City of Hyattsville v. Prince George's Cnty. Cncl. ( 2022 )


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  • City of Hyattsville, et al. v. Prince George’s County Council, et al., No. 1261, Sept. Term
    2020. Opinion by Arthur, J.
    LAND USE – MARYLAND-WASHINGTON REGIONAL DISTRICT ACT –
    JURISDICTION OF DISTRICT COUNCIL
    The Maryland-Washington Regional District Act (RDA), which covers most of
    Montgomery County and Prince George’s County, allocates certain land use functions
    between the county planning boards and the district councils. The RDA authorizes the
    district council to grant zoning map amendments. The RDA provides that the county
    planning boards have exclusive jurisdiction to make recommendations to the district
    council with respect to zoning map amendments.
    Section 27-548.26(b)(1)(B) of the Prince George’s County Code allows an owner of
    property in the development district overlay zone to request changes to the underlying
    zone of the property or to the list of allowed uses. Under this provision, the Planning
    Board must submit a recommendation to the District Council, after which the District
    Council may approve or disapprove the requested amendment. A decision to change the
    underlying zone and list of allowed uses for a property is, in substance, a decision to
    approve a zoning map amendment. The decision, therefore, falls within the District
    Council’s authority under the RDA to approve zoning map amendments.
    LAND USE – PIECEMEAL REZONING DECISIONS
    Generally, piecemeal rezoning of a property from one Euclidean zone to another may be
    granted only upon a showing of either a mistake in the prior original or comprehensive
    zoning or a substantial change in the character of the neighborhood since the time of the
    original or comprehensive zoning. As an exception, no such showing of a change or
    mistake is required to grant an application for a floating zone. To rezone a property to a
    floating zone, the local zoning body must find that the legislative prerequisites for the
    zone are satisfied and that the rezoning is compatible with the surrounding neighborhood.
    Section 27-548.26(b) of the Prince George’s County Code authorizes changes to the
    underlying zone or list of allowed uses for properties located in the development district
    overlay zone. This provision requires no showing of a change or mistake. To approve an
    application, the District Council must “find that the proposed development conforms with
    the purposes and recommendations for the Development District, . . . meets applicable
    site plan requirements, and does not otherwise substantially impair the implementation of
    any comprehensive plan applicable to the subject development proposal.” Id. § 27-
    548.26(b)(5). This legislatively-established process for making certain zoning changes is
    sufficiently analogous to the process of applying for a floating zone that it is an
    appropriate exercise of the District Council’s zoning powers. No showing of change or
    mistake is required in this context.
    LAND USE – DENSITY REGULATIONS
    Under the Prince George’s County Code, “Development District Standards” in the
    development district overlay zone may modify density regulations of the underlying
    zone. PGCC § 27-548.23(b) provides: “Development District Standards may not permit
    density in excess of the maximum permitted in the underlying zone.” Throughout the
    zoning ordinance, density means the number of dwelling units per net acre of net lot or
    tract area. Net lot area means the total area of the property, excluding: alleys, streets, and
    other public ways; and land lying within the 100-year floodplain.
    In this case, the District Council added townhouses to the list of allowed uses for a
    property in the development district overlay zone. In the underlying zone, the maximum
    density for one-family detached residences is 6.7 dwelling units per net acre. The zoning
    ordinance provides no maximum density for townhouses in the underlying zone. The
    District Council erred in approving a density of 6.7 dwelling units “per acre” for one-
    family detached residences, because that density exceeds the maximum of 6.7 dwelling
    units per net acre of net lot or tract area. The District Council also erred in approving a
    density of 9.0 dwelling units “per acre” for townhouses. Although the District Council
    could establish a density for townhouses that is different from the density for one-family
    detached residences, the District Council must express that density as a number of
    dwelling units per net acre of net lot or tract area.
    Circuit Court for Prince George’s County
    Case Nos. CAL1921492 & CAL1922819
    REPORTED
    IN THE COURT OF SPECIAL APPEALS
    OF MARYLAND
    No. 1261
    September Term, 2020
    ______________________________________
    CITY OF HYATTSVILLE, ET AL
    v.
    PRINCE GEORGE’S COUNTY COUNCIL,
    ET AL.
    ______________________________________
    Kehoe,
    Arthur,
    Wells,
    JJ.
    ______________________________________
    Opinion by Arthur, J.
    ______________________________________
    Filed: February 23, 2022
    * Leahy, J., did not participate in the Court’s
    decision to designate this opinion for
    publication pursuant to Md. Rule 8-605.1.
    Pursuant to Maryland Uniform Electronic Legal
    Materials Act
    (§§ 10-1601 et seq. of the State Government Article) this document is authentic.
    2022-02-24
    09:31-05:00
    Suzanne C. Johnson, Clerk
    This appeal concerns a decision by the Prince George’s County Council, sitting as
    the District Council, to approve zoning changes for a property located within the City of
    Hyattsville. The District Council rezoned part of the property from the “Open Space”
    zone to the “One-Family Detached Residential” zone and amended the list of allowed
    uses to permit townhouses to be constructed on the property. After the City of
    Hyattsville and several Hyattsville residents petitioned for judicial review, the Circuit
    Court for Prince George’s County affirmed the District Council’s decision.
    For the reasons set forth in this opinion, we shall uphold the District Council’s
    decision to change the zoning of the property and to amend the list of allowed uses, but
    we shall direct that this case be remanded to the District Council to reconsider its
    decision regarding the density of development permitted on the property.
    FACTUAL AND PROCEDURAL BACKGROUND
    A.     The Subject Property
    This case concerns a property located within the City of Hyattsville in Prince
    George’s County. The property includes two parcels separated by a city street, 40th
    Place. The upper parcel is approximately 3.6 acres in size, and the lower parcel is
    approximately 4.66 acres in size.
    The upper parcel formerly served as the site of the headquarters building for the
    Washington Suburban Sanitary Commission (WSSC). The building has been vacant
    since the mid-1990s. A parking lot for the former WSSC headquarters is located on the
    lower parcel. A significant percentage of the lower parcel lies within the County’s 100-
    year floodplain.1
    Adjoining properties to the north of the subject property are developed with
    single-family detached houses. Three multi-family apartment buildings sit on the
    adjoining properties located to the south of the upper parcel and to the east of the lower
    parcel. A public park known as Magruder Park sits on the adjoining properties located to
    the south and west of the subject property.
    2 B. 2004
     Sector Plan and Sectional Map Amendment
    In September 2004, the Prince George’s County Planning Board adopted a sector
    plan for the “Gateway Arts District,” which covers the City of Hyattsville and three other
    municipalities. To implement the sector plan, the Planning Board endorsed a sectional
    map amendment, which included comprehensive rezoning of the Gateway Arts District.
    The Prince George’s County Council, sitting as the District Council, approved the sector
    plan and sectional map amendment in November 2004.
    The sector plan “provides comprehensive guidance for future development” in the
    Gateway Arts District. 2004 Approved Sector Plan and Sectional Map Amendment for
    1
    The Prince George’s County zoning ordinance defines the “One Hundred (100)
    Year Floodplain” as “[t]hat area of land which would be covered by a flood that has a one
    percent (1%) chance of being equalled or exceeded in any year[.]” Prince George’s
    County Code (“PGCC”) § 27-107.01(a)(90). The 100-year floodplain is “delineated on a
    County comprehensive watershed management study approved by the County
    Stormwater Management Task Force.” PGCC § 27-124.01.
    2
    An overhead image of the property is included in Appendix A to this opinion.
    2
    the Prince George’s County Gateway Arts District, at v.3 The sector plan describes seven
    “character areas,” each with distinct characteristics. Id. at 17. Each character area has its
    own set of “Development District Standards,” which “implement the concepts and
    recommendations” for each character area. Id. at 135. The sector plan assigned the
    subject property to the “traditional residential neighborhood” or “TRN” character area,
    which is reserved primarily for single-family housing. See id. at 138.
    The 2004 sectional map amendment imposed an overlay zone known as the
    Development District Overlay (D-D-O) zone over the entire Gateway Arts District. “The
    D-D-O Zone is a mapped zone which is superimposed by a Sectional Map Amendment
    (SMA) over other zones in a designated development district, and may modify
    development requirements within the underlying zones.” Prince George’s County Code
    (“PGCC”) § 27-548.19. New development on properties in the D-D-O zone generally
    requires approval of a detailed site plan by the County Planning Board, which reviews the
    detailed site plan for its compliance with the applicable development standards. Id.
    In addition to establishing an overlay zone, the sectional map amendment changed
    the underlying zones for various properties. Before the rezoning, both parcels of the
    subject property were assigned to the “R-55” or “One-Family Detached Residential”
    zone. See PGCC § 27-430. The sectional map amendment left the upper parcel in the R-
    55 zone, but changed the lower parcel to the “O-S” or “Open Space” zone. The O-S
    zone, whose purposes include the conservation of natural resources, permits development
    3
    This document is available online at: https://www.mncppcapps.org/planning/
    publications/BookDetail.cfm?item_id=23&Category_id=1.
    3
    at a lower density relative to other residential zones. PGCC § 27-542(a). The sectional
    map amendment gave the following explanation for this change: “Rezoning to O-S
    creates the opportunity to expand parkland and reinforce the vision of the traditional
    residential neighborhood character area.” 2004 Approved Sector Plan and Sectional Map
    Amendment, at 123.
    C.     Werrlein’s Applications for Rezoning of the Property
    Long after the 2004 rezoning, a development company known as Werrlein WSSC,
    LLC, purchased the subject property. Werrlein intended to remove the former WSSC
    headquarters building and parking lot and to construct a combination of one-family
    detached residences and attached residences (i.e., townhouses) on the property.
    The existing zoning classifications for the property did not permit townhouses. In
    the traditional residential neighborhood character area of the D-D-O zone, townhouses
    are permitted if that use is allowed in the property’s underlying zone. 2004 Approved
    Sector Plan and Sectional Map Amendment, at 196. Under the County zoning ordinance,
    townhouses are not permitted in the R-55 zone, except under certain narrow
    circumstances. See PGCC § 27-441(b). One-family detached dwellings are permitted in
    the R-55 zone (id.), with a maximum density for 6.7 dwelling units per net acre of net lot
    or tract area. PGCC § 27-442(h). One-family detached dwellings are permitted in the O-
    S zone (PGCC § 27-441(b)), with a maximum density of 0.2 dwelling units per net acre
    of net lot area or tract area. PGCC § 27-442(h). Townhouses generally are not permitted
    in the O-S zone. PGCC § 27-441(b).
    On March 29, 2018, Werrlein submitted an application to the Planning Board
    4
    under PGCC § 27-548.26(b). That provision states, in relevant part, that an owner of
    property located in the approved D-D-O zone “may request changes to the underlying
    zones or the list of allowed uses, as modified by the Development District Standards.”
    PGCC § 27-548.26(b)(1)(B). In the application, Werrlein asked to “amend the Table of
    Uses . . . to allow single-family attached/detached dwellings in the [traditional residential
    neighborhood] area for this site.” The application included a conceptual site plan
    depicting the proposed development. Initially, Werrlein proposed to develop the property
    with 16 detached dwelling units and 66 attached dwelling units (i.e., townhouses), for a
    total of 82 dwelling units. The upper parcel would have both detached houses and
    townhouses, while the lower parcel would have townhouses only.4
    Werrlein subsequently submitted two amended applications. In the first amended
    application, Werrlein asked to change the zoning of the lower parcel to either the R-55
    zone or the R-10A Zone, which permits “high-density multifamily residential
    development[.]” PGCC § 27-438(a)(1)(a). The second amended application asked to
    rezone both parcels to the “M-U-I” or “Mixed Use – Infill” zone, which permits “a mix
    of residential and commercial uses as infill development in areas which are already
    substantially developed.” PGCC § 27-546.15(a).
    After a series of votes by its City Council, the City of Hyattsville notified the
    Planning Board that the City did not support Werrlein’s requests for rezoning of the
    property. Separately, however, the City reached an agreement with Werrlein to purchase
    4
    An illustration of the development proposal is included in Appendix B to this
    opinion.
    5
    1.81 acres of the lower parcel, which the City intended to use to expand Magruder Park.
    Settlement of the purchase agreement was contingent on Werrlein obtaining a zoning
    amendment. The agreement stated that no part of it should be construed as an
    endorsement, by the City, of Werrlein’s requests for a zoning amendment.
    D.     Initial Recommendation by the Planning Board
    The Prince George’s County zoning ordinance sets forth a multi-step process after
    a property owner applies for certain zoning changes in the approved development district
    overlay zone. First, the Planning Board’s technical staff must review the application and
    submit a written report. PGCC § 27-548.26(b)(3). Next, the Planning Board must hold a
    public hearing and submit a recommendation to the District Council. Id. Ultimately, the
    District Council may approve, conditionally approve, or disapprove the requested zoning
    changes. PGCC § 27-548.26(b)(5).
    After Werrlein submitted the second amended application, the Planning Board’s
    technical staff reviewed the application and issued a written report. The technical staff
    advised the Board not to endorse Werrlein’s request to rezone the property to the M-U-I
    zone, concluding that the M-U-I zone was not appropriate for the traditional residential
    neighborhood character area of the D-D-O zone. The report advised the Board, however,
    to recommend rezoning the lower parcel from the O-S zone to the R-55 zone and
    allowing “single-family attached residential development” (i.e., townhouses) on the
    property.
    The staff report observed that, under PGCC § 27-548.23(b), Development District
    Standards in the D-D-O zone “may not permit density in excess of the maximum
    6
    permitted in the underlying zone.” For that reason, the report concluded that “the single-
    family dwellings be developed consistent with the maximum allowed density of 6.7
    dwelling units per gross acre in the R-55 Zone[.]”5 The report recommended that “the
    single-family attached dwellings, which do not have a density limitation in the R-55 Zone
    because they are not generally permitted, be allowed at nine dwelling units per gross
    acre.”
    The staff report noted that, because of a special exemption included in the 2004
    enactment creating the D-D-O zone, “R-55 zoned properties in the [traditional residential
    neighborhood] character area, within the City of Hyattsville” ordinarily are exempt from
    D-D-O development standards. The report advised the Board that, to ensure that the new
    development would be compatible with the existing development on the adjoining
    properties, the entire property should be subject to all development standards for the
    traditional residential neighborhood character area of the D-D-O zone.
    On July 26, 2018, the Planning Board held a public hearing to consider Werrlein’s
    application. During the hearing, a representative of the City of Hyattsville and several
    residents from the neighborhood surrounding the property voiced their opposition to the
    application, while some residents expressed support for the application. The Planning
    Board voted to adopt the staff report’s recommendations for rezoning the property. The
    Planning Board adopted a resolution recommending that the District Council disapprove
    5
    In fact, the maximum density for one-family detached dwellings in the R-55 zone
    is 6.7 dwelling units per net acre of net lot or tract area. PGCC § 27-442(h). Net lot area
    is the total contiguous area of a lot, excluding: alleys, streets, and other public ways; and
    land lying within the 100-year floodplain. PGCC § 27-107.01(a)(161).
    7
    the request to rezone the property to the M-U-I zone and approve rezoning the lower
    parcel to the R-55 zone.
    In its resolution, the Planning Board recommended that the District Council
    “permit single-family attached residential development, in accordance with the goals and
    recommendations of the Traditional Residential Neighborhood Character Area on the
    property.” The resolution stated: “The maximum density for single-family attached is 9
    dwelling units per acre and the maximum density for single-family detached is as
    permitted in the R-55 zone, or 6.7 dwelling units per acre.” Finally, the Planning Board
    recommended approval of the conceptual site plan, subject to certain conditions. Among
    other things, the resolution stated that, prior to the issuance of any building permit,
    Werrlein would be required to “obtain approval of a detailed site plan (DSP) of the entire
    site[,]” at which point the property would “be subject to all Development District Overlay
    (D-D-O) Zone standards applicable to the Traditional Residential Neighborhood
    Character area.”
    E.     Appeal to the District Council and Remand to the Planning Board
    Sarah Eisen, along with several other Hyattsville residents, took an appeal of the
    Planning Board’s decision, urging the District Council to reject the application. Among
    their various objections, the Eisen parties asserted that the Planning Board had “failed to
    provide a legally sufficient basis” for “allowing townhouses in the R-55 zone” or for
    “allowing residential density that exceeds what is allowed in the R-55 zone.” The Eisen
    parties further argued that, because Werrlein’s second amended application had asked to
    rezone the property to the M-U-I zone, the District Council lacked the authority to rezone
    8
    the property to the R-55 zone.
    In addition, the Eisen parties asserted that the Planning Board had failed to comply
    with PGCC § 27-125.05(a), which requires the Planning Board to publish the technical
    staff report on its website at least two weeks before the public hearing in any zoning or
    site plan case. As the Eisen parties observed, the Planning Board had published the staff
    report on its website just seven days before the hearing.
    In a letter to the District Council, the City of Hyattsville expressed its “opposition
    to the process utilized in reviewing” the application. The City observed that the Planning
    Board ultimately recommended a zone different from the one requested in the
    application. In light of that change, as well as the delay in publishing the staff report, the
    City argued that it had not “receive[d] adequate notice of the proposed zoning change.”
    After a hearing at which it heard oral argument from the parties of record, the
    District Council issued an order remanding the matter to the Planning Board for a limited
    review of specific issues before the District Council’s final decision on the merits of the
    application. The District Council relied on PGCC § 27-548.26(b)(3), which provides:
    “Before final action, the District Council may remand the application to the Planning
    Board for review of specific issues.”
    In its remand order, the District Council rejected various challenges made by the
    Eisen parties. The District Council reasoned that, even though Werrlein had requested
    rezoning both parcels to the M-U-I zone, “the Planning Board was authorized to
    recommend a zone different from what the applicant requested.” The District Council
    determined, however, that the Planning Board had failed to publish a copy of the
    9
    technical staff report on its website at least two weeks before the hearing, as required by
    PGCC § 27-102.05(a). For that reason, the District Council directed the Planning Board
    to schedule a new hearing and “to allow the applicant and opposition adequate time to
    present evidence for and against the application.”
    As part of the remand, the District Council directed the Planning Board to
    “provide supplemental analysis” for the recommendation to rezone the property to the R-
    55 zone. The District Council directed the Planning Board to “focus” on the criteria
    stated in PGCC § 27-548.26(b)(1)(B)(ii) for approving requests to amend Development
    District Standards for properties in the D-D-O zone. The District Council further directed
    the Planning Board to “provide supplemental analysis and explanation of the maximum
    density per acre for single-family attached and single-family detached dwelling units for
    the R-55 Zone recommendation.”
    After the remand, the Planning Board received a supplemental memorandum from
    its technical staff and scheduled a new hearing. One of the five commissioners was
    absent from the hearing. At the conclusion of testimony and arguments, one
    commissioner moved to adopt the analysis of the staff memorandum and to recommend
    that the District Council again approve the application. The motion failed, by a tie vote,
    with two commissioners in support of the motion and two opposed. No additional
    motions were made.
    The Planning Board issued an amended resolution stating that, because the motion
    for approval had failed, the Board would forward the application “to the District Council
    for final decision, without a recommendation supporting any rezoning of the property.”
    10
    The amended resolution stated that the Board was making “NO RECOMMENDATION”
    on the request for rezoning of the property.
    F.     Final Decision of the District Council
    At a public hearing on May 13, 2019, the District Council voted to approve the
    rezoning of the lower parcel and to allow townhouses on the subject property. The
    District Council directed its staff to prepare an order conditionally approving Werrlein’s
    application. On June 10, 2019, the District Council issued its final decision approving
    the conceptual site plan and the “request to change the underlying zone of a portion of the
    subject property from Open-Space (O-S) to R-55 (One-Family Detached Residential) and
    the list of allowed uses in the Development District, to facilitate R-55 development of the
    entire 8.26 acres[.]”
    The District Council concluded that rezoning the lower parcel to the R-55 zone
    would advance the purposes and recommendations of the traditional residential
    neighborhood character area, as set forth in the sector plan. The District Council
    emphasized that the “[t]estimony was overwhelming and persuasive that the abandoned
    WSSC building and vacant parking lot on the property are an ‘eyesore’” and “are not
    compatible with the surrounding residential neighborhood.” “In stark contrast to the
    abandoned WSSC headquarters and parking lot,” the District Council wrote, “the
    Conceptual Site Plan demonstrates that the subject property will be compatible with the
    surrounding residential neighborhood when a portion of the property is rezoned to R-55,
    to facilitate R-55 development of the entire 8.26[ ]acres with single-family attached
    townhomes and detached single-family homes.”
    11
    In its written decision, the District Council endorsed the proposed densities of “9
    dwelling units per acre . . . for single-family attached units and 6.7 dwelling units per acre
    (as permitted in R-55) for single-family detached units[.]” The District Council stated
    that allowing those proposed densities would “benefit the proposed development,” would
    “further the purposes of the Development District,” and would “not substantially impair
    the implementation” of the 2004 sector plan or the applicable master plan. The District
    Council also stated that the proposed development would “enable density transition from
    the higher multi-family zone” on one side of the property and “the lower single-family
    zone” on the other side. A footnote stated that Werrlein was “propos[ing]” the
    development of 31 dwelling units on the upper parcel and 41 units on the lower parcel,
    for a total of 72 units on the 8.26-acre property.
    Overall, the District Council concluded that changing the underlying zone of the
    lower parcel and the list of allowed uses for the property would “benefit the proposed
    development,” would “further the purposes of the Development District,” and would “not
    substantially impair the implementation of” the 2004 sector plan or any other applicable
    comprehensive plan.
    G.     Petitions for Judicial Review
    The City of Hyattsville petitioned for judicial review of the District Council’s
    decision in the Circuit Court for Prince George’s County. The Eisen parties filed a
    separate petition for judicial review. The circuit court later consolidated the two
    petitions. Werrlein and the District Council each opposed the two petitions.
    In the circuit court, the City of Hyattsville argued that, under County Council of
    12
    Prince George’s County v. Zimmer Development Co., 
    444 Md. 490
     (2015), the Planning
    Board (rather than the District Council) had exclusive jurisdiction to decide whether to
    approve or disapprove Werrlein’s application. The City further argued that the Planning
    Board’s tie vote after the remand operated as an outright denial of the application. The
    City contended, therefore, that the District Council lacked the authority to make its own
    independent decision to approve the application after the Planning Board failed to
    approve it.
    In addition, the City contended that the decision to change the zoning
    classification of the lower parcel contravened Maryland’s “change-mistake” rule. See
    generally Mayor & City Council of Rockville v. Rylyns Enters., Inc., 
    372 Md. 514
    , 538-
    39 (2002). The City argued that this rule prohibited the rezoning of the lower parcel,
    absent a showing of unforeseen and significant changes in the surrounding neighborhood
    since the prior comprehensive rezoning or a mistake of fact made in the previous
    comprehensive rezoning. The City argued that, because Werrlein had made no such
    showing of either a “change” or a “mistake,” the application should have been denied.
    For their part, the Eisen parties purported to rely on a footnote within the
    enactment creating the D-D-O zone for the Gateway Arts District, which states: “R-55
    zoned properties in the [traditional residential neighborhood] character area within the
    incorporated City of Hyattsville are exempt from the development standards and will
    abide by the requirements of the R-55 Zone.” 2004 Approved Sector Plan and Sectional
    Map Amendment, at 144. The Eisen parties contended that this exemption precluded the
    District Council from changing the allowed uses or density regulations for the subject
    13
    property.
    The Eisen parties further contended that, as approved by the District Council, the
    density of the development would exceed the maximum density permitted under the
    County zoning ordinance. The Eisen parties pointed out that, for properties in the D-D-O
    zone, density may not exceed the maximum density permitted in the underlying zone.
    See PGCC § 27-548.23(b). The Eisen parties observed that, in the R-55 zone, the
    maximum density for one-family detached dwellings is 6.7 dwelling units per net acre of
    net lot area. See PGCC § 27-442(h). The Eisen parties argued that the District Council
    exceeded these limits by approving densities of 6.7 detached dwelling units “per acre”
    (rather than net acre) and nine attached dwelling units “per acre.”
    On December 14, 2020, after a hearing, the circuit court issued an order affirming
    the decision of the District Council. In a memorandum opinion accompanying its order,
    the circuit court concluded that “[t]he final decision of the District Council, on rezoning,
    amendment of the use tables, and certain density of development on the property was
    supported by substantial evidence[,]” and “was not arbitrary or capricious or based on an
    erroneous interpretation or application of the law.”
    After the circuit court entered its order affirming the decision of the District
    Council, the City of Hyattsville and the Eisen parties each filed timely notices of appeal.
    QUESTIONS PRESENTED
    In their appeals, the City of Hyattsville and the Eisen parties ask this Court to
    reverse the District Council’s decision and to direct the District Council to disapprove
    Werrlein’s application. They present an array of challenges to different components of
    14
    the District Council’s decision.
    In its appellate brief, the City of Hyattsville asks: “Did the District Council err in
    its approval of [Werrlein’s application]?” The City contends that the District Council
    lacked the authority to approve the application after the Planning Board failed to approve
    it by a majority vote. Separately, the City contends that the District Council erred by
    rezoning the lower parcel without making any finding of either a change in the character
    of the neighborhood or a mistake in the existing zoning classification. The City also
    contends that the decision to rezone the lower parcel to the R-55 zone should be reversed
    because, the City argues, that decision is “inconsistent” with the 2004 sector plan.
    In their appellate brief, the Eisen parties ask: “Did the District Council’s decision
    to authorize development of 72 dwelling units including Townhouses, at up to nine (9)
    units per gross acre, violate the Zoning Ordinance?” The Eisen parties contend that, even
    if the decision to rezone the lower parcel to R-55 should be upheld, the District Council
    lacked authority to change the list of allowed uses on the subject property to include
    townhouses. The Eisen parties further contend that the District Council erroneously
    approved densities for the subject property in excess of the maximum density permitted
    in the underlying zone.
    The District Council and Werrlein each argue that the District Council’s decision
    is supported by substantial evidence and not premised on any error of law and,
    consequently, should be affirmed.
    STANDARD OF REVIEW
    “When acting in its zoning capacity, the District Council acts as an administrative
    15
    agency.” Grant v. County Council of Prince George’s County, 
    465 Md. 496
    , 503 (2019)
    (citing County Council of Prince George’s County v. Brandywine Enters., Inc., 
    350 Md. 339
    , 342 (1998)). By statute, an aggrieved party may petition for judicial review of a
    final decision of the District Council, including an individual map amendment. Md.
    Code (2012, 2020 Supp.), § 22-407(a) of the Land Use Article (“LU”). In the judicial
    review action, the circuit court may:
    (1) affirm the decision of the district council;
    (2) remand the case for further proceedings; or
    (3) reverse or modify the decision if the substantial rights of the petitioner
    have been prejudiced because the district council’s action is:
    (i) unconstitutional;
    (ii) in excess of the statutory authority or jurisdiction of the district
    council;
    (iii) made on unlawful procedure;
    (iv) affected by other error of law;
    (v) unsupported by competent, material, and substantial evidence in
    view of the entire record as submitted; or
    (vi) arbitrary or capricious.
    LU § 22-407(e).
    In an appeal from the circuit court’s judgment, this Court’s “role is to repeat the
    task of the circuit court, i.e., to determine whether the circuit court’s review was correct.”
    Colao v. County Council of Prince George’s County, 
    109 Md. App. 431
    , 458 (1996)
    (citing Cox v. Prince George’s County, 
    86 Md. App. 179
    , 187 (1991)). Accordingly, this
    16
    Court evaluates the agency’s decision using the same standards used by the circuit court.
    See Grant v. County Council of Prince George’s County, 465 Md. at 509 (citing People’s
    Counsel for Baltimore County v. Loyola Coll. in Md., 
    406 Md. 54
    , 66 (2008)).
    “Judicial review of the final zoning action of a local administrative body . . . ‘is
    narrow; it is limited [usually] to determining if there is substantial evidence in the record
    as a whole to support the agency’s findings and conclusions, and to determin[ing] if the
    administrative decision is premised upon an erroneous conclusion of law.’” Montgomery
    County v. Butler, 
    417 Md. 271
    , 283 (2010) (quoting Marzullo v. Kahl, 
    366 Md. 158
    , 171
    (2001)). An appellate court may reverse the decision of a local zoning body “‘where the
    legal conclusions reached by that body are based on an erroneous interpretation or
    application of the zoning statutes, regulations, and ordinances relevant and applicable to
    the property that is the subject of the dispute.’” Trinity Assembly of God of Baltimore
    City v. People’s Counsel for Baltimore County, 
    407 Md. 53
    , 78 (2008) (quoting People’s
    Counsel of Baltimore County v. Surina, 
    400 Md. 662
    , 682 (2007)). Appellate courts
    “review legal questions or the agency’s conclusions of law de novo.” Grant v. County
    Council of Prince George’s County, 465 Md. at 509 (citing Koste v. Town of Oxford, 
    431 Md. 14
    , 25 (2013)).
    “The scope of judicial review of administrative fact-finding is a narrow and highly
    deferential one.” Trinity Assembly of God of Baltimore City v. People’s Counsel for
    Baltimore County, 
    407 Md. at
    78 (citing People’s Counsel for Baltimore County v.
    Loyola Coll. in Md., 
    406 Md. at 66
    ). “‘[I]n zoning matters, the zoning agency is
    considered to be the expert in the assessment of the evidence, not the court.’” Cremins v.
    17
    County Comm’rs of Washington County, 
    164 Md. App. 426
    , 437 (2005) (quoting
    Bowman Group v. Moser, 
    112 Md. App. 694
    , 699 (1996)). “[P]iecemeal rezoning”
    decisions, such as the one made by the District Council in this case, are “reviewed most
    frequently under the substantial evidence test.” County Council of Prince George’s
    County v. Zimmer Dev. Co., 
    444 Md. 490
    , 510 (2015).
    “A conclusion by a local zoning board satisfies the substantial evidence test if ‘a
    reasonable mind might accept as adequate’ the evidence supporting it.” Trinity Assembly
    of God of Baltimore City v. People’s Counsel for Baltimore County, 
    407 Md. at 78
    (quoting People’s Counsel for Baltimore County v. Loyola Coll. in Md., 
    406 Md. at 67
    ).
    In other words, “[t]he determination of the zoning authority should be upheld ‘if
    reasoning minds could reasonably reach the conclusion from facts in the record.’”
    County Council of Prince George’s County v. Zimmer Dev. Co., 444 Md. at 510 (quoting
    Cremins v. County Comm’rs of Washington County, 164 Md. App. at 438). If substantial
    evidence supports the conclusion of the zoning agency, the courts may not disturb that
    conclusion, “‘even if substantial evidence to the contrary exists.’” Cremins v. County
    Comm’rs of Washington County, 164 Md. App. at 438 (quoting White v. Spring, 
    109 Md. App. 692
    , 699 (1996)).
    In sum, unless the zoning decision is premised on an error of law, the court’s
    proper role “‘is not to substitute [its] assessment of the facts for those of the [local zoning
    agency] . . ., but merely to evaluate whether the evidence before the [agency] was “fairly
    debatable[.]”’” Trinity Assembly of God of Baltimore City v. People’s Counsel for
    Baltimore County, 
    407 Md. at 77
     (quoting Pemberton v. Montgomery County, 
    275 Md. 18
    363, 367-68 (1975)).
    I.     Nature of District Council’s Jurisdiction
    The City of Hyattsville contends that the District Council lacked the authority to
    decide whether to approve Werrlein’s application after the Planning Board failed to
    approve it. In this regard, the City advances two overlapping arguments.
    First, the City argues that the District Council should have treated the Planning
    Board’s action after the remand as a decision to disapprove Werrlein’s application. As
    recounted previously, the Planning Board initially recommended that the District Council
    conditionally approve the application. The District Council remanded the matter to the
    Planning Board and directed the Board to provide supplemental analysis regarding its
    recommendations. During the remand hearing, the Planning Board reached a tie vote on
    a motion to recommend approval of the application. The Planning Board issued an
    amended resolution stating that it was making “no recommendation” on whether to
    approve or disapprove the request for a zoning amendment. The District Council then
    proceeded to make its final decision, in which it conditionally approved the application.
    In its appellate brief, the City of Hyattsville asserts that the District Council
    “erroneously interpreted the Planning Board’s tie vote” after the remand. The City
    observes that the Planning Board has adopted its own internal rules of procedure, which
    are supplemented by Robert’s Rules of Order. The City asserts that, according to
    Robert’s Rules of Order, a tie vote on a motion requiring majority assent operates as a
    denial of the motion. The City concludes that the District Council, in its final written
    decision, “mischaracterized the result of the Planning Board’s tie vote as a ‘no
    19
    recommendation.’”6
    The City further contends that, under the division of authority established by the
    enabling statute, the Planning Board had exclusive jurisdiction to approve or disapprove
    the application, while the District Council was limited to exercising appellate jurisdiction
    over the Planning Board’s decision. The City argues, therefore, that the District Council
    could properly reverse the Planning Board’s decision only if that decision was
    unsupported by substantial evidence, arbitrary, capricious, or otherwise illegal. The City
    concludes that, because the District Council did not use that limited standard of review,
    the District Council’s decision must be reversed.
    In response, the District Council and Werrlein argue that the City’s argument rests
    on an erroneous interpretation of the respective roles of the Planning Board and the
    District Council. The District Council and Werrlein contend that, in deciding whether to
    approve an application for rezoning under PGCC § 27-548.26(b), the District Council
    exercises original jurisdiction, while the Planning Board makes a mere recommendation.
    Therefore, according to Werrlein, regardless of whether the Planning Board’s action
    operates as a decision to make no recommendation or a decision to recommend denial of
    the application, the District Council “ha[d] the authority to make the final decision as to
    6
    As the District Council points out in its brief, the Planning Board provided its
    own characterization of its own action. After discussing the implications of the tie vote
    on the record, the Planning Board issued a 24-page amended resolution stating that it was
    making “NO RECOMMENDATION” regarding the request for rezoning of the property.
    The District Council did not “mischaracterize[]” the Planning Board’s decision by
    accurately reciting the Planning Board’s official account of its own action. The error, if
    any, in determining the effect of the Planning Board’s tie vote occurred in the Planning
    Board’s proceedings, not those of the District Council.
    20
    rezoning and amending the table of uses.”7
    For the reasons explained below, we conclude that the District Council had
    original jurisdiction to decide whether to approve or disapprove the request to change the
    zoning of the lower parcel and to amend the list of allowed uses for the property. Thus,
    even if the Planning Board’s action after the remand should be treated as a
    recommendation to deny the application, the District Council was statutorily authorized
    to make its own independent decision on the merits of the application. The Planning
    Board’s tie vote in no way limited the District Council’s plenary authority to grant the
    requested zoning changes for the subject property.
    A.     Division of Authority under the Regional District Act
    “Under Maryland’s constitutional scheme, a local government’s authority to
    regulate land use may emanate only from enabling legislation of the General Assembly.”
    County Council of Prince George’s County v. Zimmer Dev. Co. (“Zimmer”), 
    444 Md. 490
    , 504 (2015) (citing Md. Const. Art. XI). The property at issue in this case is located
    in the portion of Prince George’s County governed by the Maryland-Washington
    7
    During its second hearing, the District Council considered analysis from a staff
    member regarding the effect of the Planning Board’s tie vote. The staff member
    remarked that, “under Robert’s Rules of Order, . . . a two-two tie is effectively a
    denial[,]” because it “essentially means that there was not enough support for approval.”
    The staff member stated that the Planning Board’s action after remand was “effectively . .
    . a denial of the request for the R-55 zone.” The staff member opined that, in any event,
    the exact nature of the Planning Board’s action was inconsequential because the Planning
    Board “has no authority or jurisdiction” to rezone a property or to change the list of
    allowed uses. Given these comments, it seems likely that the District Council proceeded
    on the premise that, regardless of how one should construe the Planning Board’s action
    after the remand, the District Council was still the primary and final decision-maker
    regarding the merits of the application.
    21
    Regional District Act (RDA), codified at Division II of the Land Use Article of the
    Maryland Code. The RDA “regulates planning and zoning within the Regional District,
    which includes most of Prince George’s and Montgomery Counties.” Zimmer, 444 Md.
    at 525. The RDA is “the exclusive source of zoning authority in those areas of Prince
    George’s County which it covers.” County Council of Prince George’s County v.
    Brandywine Enters., Inc., 
    350 Md. 339
    , 342 (1998).
    The RDA “divides broadly authority related to zoning, planning, and other land
    use matters between the county (district) councils, the Maryland-National Capital Park &
    Planning Commission, and the county planning boards.” Zimmer, 444 Md. at 525-26.
    The county councils for Prince George’s County and Montgomery County, consisting of
    elected council members, are the legislative branches of their respective local
    governments. See Prince George’s County Charter, Art. III, § 301; Montgomery County
    Charter, Art. I, § 101. The county councils serve as district councils for the portion of the
    regional district located in their respective counties. Md. Code (2012, 2020 Supp.), § 22-
    101 of the Land Use Article (“LU”).
    The Maryland-National Capital Park & Planning Commission consists of five
    commissioners from Prince George’s County and five commissioners from Montgomery
    County. LU § 15-102(a)(1)-(2). The Montgomery County Council appoints each
    commissioner from Montgomery County, while the Prince George’s County Executive
    appoints each commissioner from Prince George’s County. LU § 15-102(a)(3). The five
    commissioners from each county serve as the planning boards for their respective
    22
    counties. LU § 20-201.8
    The RDA grants “wide-ranging authority to the District Council to regulate zoning
    within the County.” Grant v. County Council of Prince George’s County, 
    465 Md. 496
    ,
    540 (2019). The RDA empowers the District Council to “divide the portion of the
    regional district located within its county into districts and zones of any number, shape,
    or area it may determine.” LU § 22-201(a). The RDA authorizes the District Council
    “by local law” to “adopt and amend the text of the zoning law” for the County and to
    “adopt and amend any map accompanying the text of the zoning law” for the County.
    LU § 22-104(a)(1)-(2). By local zoning ordinance, the District Council may regulate
    matters such as “the density and distribution of the population” (LU § 22-104(b)(4)), “the
    location and uses of buildings and structures” for residential and other purposes (LU §
    22-104(b)(5)), and “the uses of land” for those purposes (LU § 22-104(b)(6)).9
    8
    Multiple provisions of the RDA “seek[] to foster a degree of independence in and
    immunize, to some extent, the Commission from undue grass roots and hierarchical
    political influence.” Zimmer, 444 Md. at 527. The RDA states that commissioners must
    be persons “of ability, experience, and integrity” (LU § 15-102(b)), and “may not be
    selected as representing or supporting any special interest.” LU § 15-102(c)(2). No more
    than three of the five commissioners from each county may be members of the same
    political party. LU § 15-102(c)(1). The RDA also includes broad disclosure
    requirements and other restrictions regarding potential conflicts of interest for
    commissioners. See LU § 15-120. These provisions reflect “an intent of the State
    Legislature to prevent corruption of or the appearance of impropriety by the
    commissioners.” Zimmer, 444 Md. at 528. In short, the Commission and planning
    boards are designed to be “relatively apolitical” in nature. Id. at 527 n.34.
    9
    Furthermore, “[i]n approving any zoning map amendment,” the Prince George’s
    County District Council “may consider and adopt any reasonable requirements,
    safeguards, and conditions that: (1) may be necessary to protect surrounding properties
    from adverse effects that might accrue from the zoning map amendment; or (2) would
    further enhance the coordinated, harmonious, and systematic development of the regional
    23
    Under the RDA, the county planning boards are “responsible for planning,
    subdivision, and zoning functions that are primarily local in scope[.]” LU § 20-
    202(a)(1)(i). Except for “regional planning functions of the Commission related to or
    affecting the regional district as a planning unit” (LU § 20-202(a)(2)), the RDA
    authorizes a county planning board to “exercise, within the county planning board’s
    jurisdiction, the following powers: 1. planning; 2. zoning; 3. subdivision; 4. assignment
    of street names and house numbers; and 5. any related matter.” LU § 20-202(a)(1)(ii).
    The RDA further provides:
    (b)(1) A county planning board has exclusive jurisdiction over:
    (i) local functions, including:
    1. the administration of subdivision regulations;
    2. the preparation and adoption of recommendations to the
    district council with respect to zoning map amendments; and
    3. the assignment of street names and house numbers in the
    regional district[.]
    LU § 20-202(b)(1).
    In addition, the RDA specifies that “functions not specifically allocated” in the
    subtitle governing the county planning boards “shall be assigned to the Commission or to
    one or both of the county planning boards, as needed.” LU § 20-207(a). These
    “assignments shall: (1) be made by resolution of the Commission with the approval of the
    respective county council; and (2) carry out the policy that local or intracounty planning
    district.” LU § 22-214(a). The RDA includes no similar provision for Montgomery
    County.
    24
    functions should be performed by the county planning boards.” LU § 20-207(b).
    B.     Zimmer’s Interpretation of the Regional District Act
    The Court of Appeals’ opinion in County Council of Prince George’s County v.
    Zimmer Development Co. (“Zimmer”), 
    444 Md. 490
     (2015), written by Judge Glenn T.
    Harrell, Jr., provides a comprehensive overview of the land-use regime in Prince
    George’s County. In that case, the Court partially invalidated provisions of the local
    zoning ordinance through which the District Council purported to grant itself “original
    jurisdiction” to decide whether to approve or disapprove comprehensive design plans and
    specific design plans for proposed development of a property. Id. at 570-71. The Court
    held that the review of those types of design plans was one of the unspecified “local
    functions” that the General Assembly had delegated to the original jurisdiction of the
    Planning Board, subject to appellate review by the District Council. Id. at 569-70.
    The Zimmer case concerned a property in Prince George’s County on which a
    developer wished to construct a small retail center. Zimmer, 444 Md. at 536. In 2004,
    the developer applied for a zoning map amendment, seeking to rezone the property from
    a “Rural Residential” zone to a floating zone known as the “Local Activity Zone,” which
    would permit the use of the property for a retail center. Id. at 537. The application
    included “a Basic Plan depicting how [the developer] would develop the property
    generally[.]” Id. The County Council adopted an ordinance granting the requested
    rezoning, subject to numerous conditions. Id.
    Several years later, in 2011, the developer requested the approval of a proposed
    comprehensive design plan and specific design plan, which were among the prerequisites
    25
    for beginning actual development. Zimmer, 444 Md. at 541. The Planning Board
    approved those design plans, subject to certain conditions. Id. The District Council
    elected to review the decision and remanded the matter for the Planning Board to
    consider specific areas of concern. Id. at 545. The Planning Board then issued amended
    resolutions, again conditionally approving the design plans. Id. at 546. The District
    Council again elected to review the decision (id. at 547) and voted to disapprove the
    proposed design plans. Id. at 549-50.
    After the developer petitioned for judicial review, the circuit court reinstated the
    Planning Board’s decision to approve the comprehensive design plan and specific design
    plan. Zimmer, 444 Md. at 550. The Court of Special Appeals affirmed the circuit court’s
    judgment. Id. at 551. The reviewing courts concluded that the District Council was
    limited to exercising appellate jurisdiction over the proposed design plans, meaning that
    the District Council could reverse the Planning Board’s decision only if that decision was
    arbitrary, capricious, discriminatory, or otherwise illegal. Id. (citing County Council of
    Prince George’s County v. Zimmer Dev. Co., 
    217 Md. App. 310
    , 318-31 (2014)).
    In a subsequent appeal to the Court of Appeals, the District Council argued that
    comprehensive design plans and specific design plans were in “the nature of zoning map
    amendments[.]” Zimmer, 444 Md. at 554. The District Council argued, therefore, that
    the Planning Board’s decision was merely a recommendation, which the District Council
    “had original authority to decide differently . . ., without any deference owed or
    presumptive correctness accorded the Planning Board’s determination.” Id. The Court of
    Appeals agreed that “Planning Board decisions in Prince George’s County regarding
    26
    zoning map amendments are mere recommendations to the District Council[.]” Id. at
    554-55. The Court concluded, however, that the design plan approvals in question “were
    not zoning map amendments, nor d[id] they partake of the character of such
    [amendments].” Id. at 555. The Court explained that the “act of rezoning” the property
    had been “completed in 2004 when the District Council approved the [Local Activity
    Center] zone and the Basic Plan for the proposed development[.]” Id. The subsequent
    process for review of the design plans was meant to ensure that the proposed
    development addressed the goals for the zone established by the earlier rezoning. Id.
    The Court of Appeals held that, under the RDA, the county planning boards have
    original jurisdiction to decide whether to approve or deny comprehensive design plans
    and specific design plans. Zimmer, 444 Md. at 567-71. The Court explained that LU §
    20-202(b) “provides that the county planning boards have ‘exclusive jurisdiction’ over
    ‘local functions,’ but does not detail each of these local functions within each
    jurisdiction.” Id. at 567. “These functions,” the Court explained, “may include any local
    matter related to planning, zoning, subdivision, or assignment of street names and house
    numbers[,]” as well as other “unlisted local functions” “delegated to the planning boards
    pursuant to LU § 20-207[.]” Id. at 567-69. The Court noted that the General Assembly
    “did not itemize expressly or exhaustively each such intended function[.]” Id. at 569.
    The Court reasoned that the RDA “makes particular provision for the local
    functions that the Legislature did not intend to be within the planning board’s exclusive
    jurisdiction.” Zimmer, 444 Md. at 569. As an example, the Court pointed out that “LU §
    22-208 requires referral to the county planning boards of applications for zoning map
    27
    amendments for a ‘recommendation.’” Id. Because review of comprehensive design
    plans and specific design plans “were not among the local functions that the Legislature
    excepted from the planning boards’ exclusive jurisdiction,” the Court concluded that,
    “like other unspecified local planning functions, the Planning Board is invested with
    exclusive jurisdiction over the determination of [comprehensive design plans] and
    [specific design plans], subject to appellate review by the District Council.” Id. at 569-70
    (footnote omitted).
    The Court reasoned that, because comprehensive design plans and specific design
    plans fall within the “exclusive jurisdiction” of the county planning boards, the Planning
    Board must be the primary decision-maker regarding the merits of such a design plan.
    Zimmer, 444 Md. at 570. The Court concluded that a provision of the County zoning
    ordinance purporting to grant the District Council original jurisdiction over those
    decisions “violate[d] the division of authority established by the RDA” and was therefore
    “invalid.” Id.
    The District Council could, however, properly exercise appellate jurisdiction over
    the Planning Board’s decision to approve or disapprove a comprehensive design plan or
    specific design plan. Zimmer, 444 Md. at 572-73. Under that limited authority, the
    District Council could reverse the Planning board’s decision only “if it is not authorized
    by law, is not supported by substantial evidence of record, or is arbitrary or capricious.”
    Id. at 573. In other words, to ensure that the District Council does not “impinge on the
    original jurisdiction granted to the Planning Board” over comprehensive design plans and
    specific design plans, the District Council must employ the same “standard of review that
    28
    would be employed by the courts for the review of the same agency action[.]” Id. at 573.
    In two subsequent opinions, this Court has applied Zimmer to determine whether a
    particular function is reserved to the original jurisdiction of the county planning boards.
    In County Council of Prince George’s County v. Convenience Dollar Market/Eagle
    Management Co., 
    238 Md. App. 613
    , 638-39 (2018), this Court held that the Planning
    Board has original jurisdiction to approve or deny a property owner’s application for
    certification of a nonconforming use. In County Council of Prince George’s County v.
    FCW Justice, Inc., 
    238 Md. App. 641
    , 672 (2018), this Court held that the Planning
    Board has original jurisdiction over the review of a detailed site plan, when required as a
    condition of the approval of a subdivision application.
    On both occasions, this Court explained that the analysis of Zimmer is “primarily
    one of statutory interpretation.” County Council of Prince George’s County v. FCW
    Justice, Inc., 238 Md. App. at 668; County Council of Prince George’s County v.
    Convenience Dollar Market/Eagle Mgmt. Co., 238 Md. App. at 632. This Court
    emphasized that the critical issue in Zimmer was that the design plan approvals in
    question “‘were not among the local functions that the Legislature excepted from the
    planning boards’ exclusive jurisdiction.’” County Council of Prince George’s County v.
    FCW Justice, Inc., 238 Md. App. at 669 (quoting Zimmer, 444 Md. at 569); County
    Council of Prince George’s County v. Convenience Dollar Market/Eagle Mgmt. Co., 238
    Md. App. at 633 (quoting Zimmer, 444 Md. at 569). Because the RDA included no such
    exception for the particular functions in question, this Court concluded that those
    functions fell within the original jurisdiction of the Planning Board, subject to appellate
    29
    jurisdiction of the District Council. County Council of Prince George’s County v. FCW
    Justice, Inc., 238 Md. App. at 672 (certification of a nonconforming use); County Council
    of Prince George’s County v. Convenience Dollar Market/Eagle Mgmt. Co., 238 Md.
    App. at 638-39 (review of a detailed site plan required as a condition of the approval of a
    subdivision application).
    By contrast, in Grant v. County Council of Prince George’s County, 
    465 Md. 496
    ,
    533-40 (2019), the Court of Appeals held that the District Council exercises original
    (rather than appellate) jurisdiction when it considers decisions to grant or deny special
    exceptions and variances heard by a zoning hearing examiner. The Court explained that
    the RDA grants the District Council “extensive authority to establish zoning law and
    procedures under which special exception and variance cases are held.” Id. at 534. The
    Court cited LU § 22-301(a)-(b), which provides that the District Council may designate
    an administrative office or agency to grant special exceptions and variances and may
    establish procedures for appeals from those decisions. “Based on these grants of
    authority under the RDA,” the Court explained, the District Council had enacted
    ordinances authorizing the zoning hearing examiner to hear special exception and
    variance cases, while specifying that the District Council exercises “original jurisdiction”
    in those cases. Grant v. County Council of Prince George’s County, 465 Md. at 534.
    The Court concluded that the RDA included no statutory provision “which would limit
    the District Council’s jurisdiction in zoning cases[,]” “a sphere that would encompass
    special exception and variance applications.” Id. at 539.
    30
    C.     Jurisdiction Over Rezoning Decisions Under PGCC § 27-548.26(b)
    The present case arises from the District Council’s decision to approve an
    application to change the underlying zone or list of allowed uses for a property in the
    development district overlay zone.
    PGCC § 27-548.26(b)(1) states that “a property owner may request that the
    District Council amend development requirements for the owner’s property[.]” As
    relevant here, “[a]n owner of property in the Development District may request changes
    to the underlying zones or the list of allowed uses, as modified by the Development
    District Standards.” PGCC § 27-548.26(b)(1)(B). The application must include: a
    statement showing that the proposed development conforms with the purposes and
    recommendations of the development district; a description of any requested amendments
    to the Development District Standards applicable to a qualifying development proposal;
    and either a detailed site plan or a conceptual site plan. PGCC § 27-548.26(b)(2).
    After the filing of an application, “Technical Staff shall review and submit a report
    on the application, and the Planning Board shall hold a public hearing and submit a
    recommendation to the District Council.” PGCC § 27-548.26(b)(3). “Before final action
    the Council may remand the application to the Planning Board for review of specific
    issues.” Id. Ultimately, “[t]he District Council may approve, approve with conditions, or
    disapprove any amendment requested by a property owner under this Section.” PGCC §
    27-548.26(b)(5).10
    10
    In its appellate brief, the City cites PGCC § 27-276, which sets forth general
    procedures for review of conceptual site plans. As the City observes, PGCC § 27-
    31
    Without question, these provisions treat the District Council as the primary and
    final decision-maker on a request to change the underlying zone or allowed uses for a
    property in the development district. The Planning Board’s role is to “hold a public
    hearing and submit a recommendation to the District Council” (PGCC § 27-
    548.26(b)(3)), after which the District Council must decide whether to “approve, approve
    with conditions, or disapprove” the requested amendments. PGCC § 27-548.26(b)(5).
    Of course, the District Council “may not arrogate to itself original jurisdiction where the
    RDA places that responsibility elsewhere.” Zimmer, 444 Md. at 570. The remaining
    question, then, is whether this zoning ordinance violates the division of authority
    established by the RDA.
    In our assessment, the review process for applications under PGCC § 27-
    548.26(b)(1)(B) is compatible with the RDA provisions that govern zoning map
    amendments. LU § 22-206(a) expressly provides that “[a] district council may amend its
    zoning laws, including any maps: (1) in accordance with procedures established in its
    zoning laws; and (2) after holding an advertised public hearing.” The zoning laws
    established by a district council may include provisions for “hearings and preliminary
    determinations” by a board and procedures for “recommendations” by the county
    planning board. LU § 22-206(b)(2)-(3). The district council “may provide by local law
    276(a)(5) states that “[t]he Planning Board shall approve, approve with modification, or
    disapprove the Conceptual Site Plan[.]” The general site plan review procedures,
    however, do not prevail over the modified provisions for review of an application for
    zoning changes on a property in the D-D-O zone. See PGCC § 27-548.26(b)(3) (stating
    that “[f]iling and review of the application shall follow the site plan review procedures in
    Part 3, Division 9, except as modified in this Section”).
    32
    procedures for the county planning board . . . to follow in considering zoning map
    amendments” as long as those procedures do not otherwise conflict with the RDA. LU §
    22-208(b). Before approving any map amendment, the matter must be submitted to the
    county planning board “for a recommendation as to approval, disapproval, or approval
    with conditions.” LU § 22-208(a). The county planning board “has exclusive
    jurisdiction over . . . the preparation and adoption of recommendations to the district
    council with respect to zoning map amendments[.]” LU § 20-202(b)(1)(i)(2).
    Under these express provisions, decisions of whether to approve zoning map
    amendments are “among the local functions that the [General Assembly] [has] excepted
    from the planning boards’ exclusive jurisdiction.” Zimmer, 444 Md. at 569. The RDA
    places those decisions squarely within the authority of the District Council, while limiting
    the role of the Planning Board to making a recommendation regarding the District
    Council’s decision. The required “referral to the Planning Board by the District Council
    of a pending piecemeal zoning map amendment is to receive advisory input only.” Id. at
    554 n.62. The District Council “decides whether to grant the amendment.” Id. at 529
    n.38 (citing LU § 22-206).
    In this appeal, although the City of Hyattsville seeks the reversal of the District
    Council’s decision to rezone the lower parcel, the City attempts to characterize that
    decision as nothing more than the approval of a conceptual site plan. Under the County
    zoning ordinance, site plans are “two dimensional, scaled drawing[s] which illustrate[]
    existing and proposed features of a piece of property.” PGCC § 27-267(a). Conceptual
    site plans offer “a very general concept for developing a parcel of land” (PGCC § 27-
    33
    272(a)(1)) and serve to “illustrate approximate locations where buildings, parking lots,
    streets, green areas, and other similar physical features may be placed in the final design
    for the site[.]” PGCC § 27-272(c)(1)(B). Approval of a conceptual site plan, where
    required, is one of several sequential steps required before actual development may
    begin. See PGCC § 27-270(a) (establishing the following order of approvals: (1) zoning;
    (2) conceptual site plan; (3) preliminary plat of subdivision; (4) detailed site plan; (5)
    final plat of Subdivision; and (6) grading, building, use and occupancy permits).
    The City notes that, in Zimmer, the Court of Appeals remarked that the
    comprehensive design plans at issue in that case share some significant similarities with
    conceptual site plans. Zimmer, 444 Md. at 559 n.69. The City argues that, like the
    design plan approvals addressed in Zimmer, conceptual site plan approvals are “not
    among the local functions that the Legislature excepted from the planning boards’
    exclusive jurisdiction.” Id. at 569. The City argues that, using the same reasoning here,
    the Planning Board has exclusive jurisdiction to decide whether to approve or disapprove
    conceptual site plans. The City urges us to conclude, therefore, that the Planning Board
    had exclusive jurisdiction to decide whether to approve or deny Werrlein’s entire
    application.
    If the decision under review involved nothing more than the approval of a
    conceptual site plan, then the City’s argument might be persuasive. The target of the
    application here, however, was to obtain zoning changes. Werrlein’s application
    requested a change to the zoning classification of the subject property under PGCC § 27-
    548.26(b)(1)(B). The District Council ultimately approved rezoning of part of the
    34
    property from O-S to R-55 and changing the list of allowed uses to permit townhouses.
    A decision to change the underlying zone and allowed uses for a particular property is, in
    substance, a decision to approve a zoning map amendment. The RDA grants the District
    Council the authority to make such a decision, after referral to the Planning Board for a
    recommendation. See Zimmer, 444 Md. at 554 & n.62.
    It is true that Werrlein’s application included a conceptual site plan. When an
    owner of property in the D-D-O zone requests a change to the underlying zone or list of
    allowed uses, the application must “include . . . [a] site plan,” either a conceptual site plan
    or the detailed site plan that is required as a prerequisite for a building permit. PGCC §
    27-548.26(b)(2)(C). The apparent purpose of this application requirement is to assist the
    District Council (and the Planning Board, in its advisory capacity) in evaluating whether
    a proposal meets the criteria for the requested zoning changes. PGCC § 27-548.26(b)(5)
    states that, when deciding whether to approve a requested amendment, the District
    Council must evaluate whether “the proposed development conforms with the purposes
    and recommendations for the Development District, . . . meets applicable site plan
    requirements, and does not otherwise substantially impair the implementation of any
    comprehensive plan applicable to the subject development proposal.” Evaluating these
    criteria would be impracticable without at least some general concept of the proposed
    development, as provided by the site plan.
    In this context, the site plan serves as one component in a larger process of
    deciding whether to approve requested zoning changes. Even though a conceptual site
    plan (or detailed site plan) is required as part of the application, the District Council’s
    35
    decision to approve the application is, in substance, a decision to approve a zoning map
    amendment. That ultimate decision is one that, under the RDA, must be made by the
    District Council, not by the Planning Board. To conclude (as the City suggests) that the
    Planning Board has original jurisdiction to make such a rezoning decision would be to
    upend the process mandated by the RDA.11
    In sum, the function performed here falls within the District Council’s express
    statutory authority to approve zoning map amendments, after a referral to the Planning
    Board for advisory input. Accordingly, we reject the City’s contention that the District
    Council “usurped the Planning Board’s exclusive jurisdiction” when it made its own
    independent decision to approve zoning changes for the property.
    II.    Piecemeal Rezoning Without a Finding of Change or Mistake
    In addition to arguing that the District Council lacked authority to rezone the
    lower parcel, the City of Hyattsville contends that the District Council applied an
    incorrect standard when it made its rezoning decision. The City argues that the District
    Council erred by changing the zoning classification of the lower parcel without finding
    either a substantial change in the surrounding neighborhood since the previous
    11
    One might argue that, in this context, the decision to approve the conceptual site
    plan should be severed from the decision to approve zoning changes. In other words, one
    might argue that, even if the District Council exercises original jurisdiction over a request
    to change the underlying zone or list of allowed uses, the Planning Board has original
    jurisdiction to approve or disapprove the conceptual site plan associated with the
    application. The City of Hyattsville does not argue here that the rezoning decision should
    be severed from the site plan decision and that the site plan decision should be separately
    reviewed. Rather, the City challenges the District Council’s rezoning decision, under the
    guise of a challenge to the approval of a conceptual site plan.
    36
    comprehensive rezoning or a mistake of fact in the previous comprehensive rezoning.
    Because this argument involves the interplay between multiple concepts of zoning law,
    additional exposition is necessary.
    A.       The Change-Mistake Rule and Departures from that Rule
    In Maryland, the system commonly known as “Euclidean” zoning provides the
    “basic framework for implementation of land use controls at the local level.” County
    Council of Prince George’s County v. Zimmer Dev. Co., 
    444 Md. 490
    , 511 (2015).12
    Under a Euclidean zoning scheme, “a municipality divides an area geographically into
    particular use districts, specifying certain uses for each district.” Rouse-Fairwood Dev.
    Ltd. P’ship v. Supervisor of Assessments for Prince George’s County, 
    138 Md. App. 589
    ,
    623 (2001). “‘Each district or zone is dedicated to a particular purpose, either residential,
    commercial, or industrial,’ and the ‘zones appear on the municipality’s official zoning
    map.’” 
    Id.
     (quoting 1 Edward H. Ziegler, Rathkopf’s The Law of Zoning and Planning §
    63.01, at 63-1-2 (4th ed. rev. 1994)). Restrictions within any district or zone must apply
    uniformly to all properties within that district or zone. See LU § 4-201(b)(2)(i); LU § 22-
    201(b)(2)(i).
    Generally, “the act of zoning either may be original or comprehensive (covering a
    large area and ordinarily initiated by local government) or piecemeal (covering individual
    parcels, lots, or assemblages, and ordinarily initiated by the property owner).” Mayor &
    12
    The term “Euclidean” refers to Village of Euclid, Ohio v. Ambler Realty Co.,
    
    272 U.S. 365
     (1926), in which the United States Supreme Court upheld the
    constitutionality of a zoning ordinance that prohibited apartments and businesses in a
    residential district.
    37
    Council of Rockville v. Rylyns Enters., Inc., 
    372 Md. 514
    , 535 (2002). Original zoning
    and comprehensive rezoning “are purely legislative processes, while piecemeal rezoning
    is achieved, usually at the request of the property owner, through a quasi-judicial process
    leading to a legislative act.” Id. at 532. “The motives or wisdom of the legislative body
    in adopting an original or comprehensive zoning enjoy a strong presumption of
    correctness and validity[.]” Id. at 535 (citing Norbeck Vill. Joint Venture v. Montgomery
    County Council, 
    254 Md. 59
    , 65-66 (1969)). In other words, Maryland law recognizes a
    presumption that the zones established through the legislative process “were well planned
    and arranged and were intended to be more or less permanent, subject to change only
    when there are genuine changes in conditions.” Offutt v. Board of Zoning Appeals of
    Baltimore County, 
    204 Md. 551
    , 557 (1954).
    The Court of Appeals has long held that piecemeal rezoning of a property from
    one Euclidean zone to another may be granted only “upon a showing that there was a
    mistake in the prior original or comprehensive zoning or evidence that there has been a
    substantial change in the character of the neighborhood since the time the original or
    comprehensive zoning was put in place.” Mayor & Council of Rockville v. Rylyns
    Enters., Inc., 372 Md. at 535-36. “This requirement, known as the ‘change-mistake
    rule,’” serves to “prevent[] the arbitrary use” or the “abuse of the zoning power.” Id. at
    538. The Court of Appeals has explained:
    The “change-mistake” rule is a rule of the either /or type. The “change”
    half of the “change-mistake” rule requires that, in order for a piecemeal
    Euclidean zoning change to be approved, there must be a satisfactory
    showing that there has been significant and unanticipated change in a
    relatively well-defined area (the “neighborhood”) surrounding the property
    38
    in question since its original or last comprehensive rezoning, whichever
    occurred most recently. The “mistake” option of the rule requires a
    showing that the underlying assumptions or premises relied upon by the
    legislative body during the immediately preceding original or
    comprehensive rezoning were incorrect. In other words, there must be a
    showing of a mistake of fact. Mistake in this context does not refer to a
    mistake in judgment. Additionally, even where evidence of a change or
    mistake is adduced, there is no reciprocal right to a change in zoning, nor is
    there a threshold evidentiary standard which when met compels rezoning.
    Even with very strong evidence of change or mistake, piecemeal zoning
    may be granted, but is not required to be granted, except where a failure to
    do so would deprive the owner of all economically viable use of the
    property. In Maryland, the change-mistake rule applies to all piecemeal
    zoning applications involving Euclidian zones, including those involving
    conditional zoning.
    Mayor & City Council of Rockville v. Rylyns Enters., Inc., 372 Md. at 538-39 (collecting
    cases) (citations omitted).
    In response to the relative rigidity of Euclidean zoning, “various mechanisms have
    been designed and incorporated into the planning and zoning process to allow for
    changes in the uses allowed within a given zone while at the same time retaining the
    safeguards of the requirement of uniformity within zones.” Mayor & City Council of
    Rockville v. Rylyns Enters., Inc., 372 Md. at 536-37. One such mechanism “is the
    ‘special exception’ or ‘conditional use.’” Id. at 541. The legislative body, when it
    establishes the uses permitted in each zone, may identify additional uses that, although
    not permitted as a matter of right, will be allowed where an applicant meets certain
    standards of compatibility with neighboring properties. Id. at 541-42. The legislative
    body authorizes an administrative board to allow the enumerated uses based on a
    determination of “whether the neighboring properties in the general neighborhood would
    be adversely affected and whether the use in the particular case is in harmony with the
    39
    general purpose and intent” of applicable comprehensive plans. Schultz v. Pritts, 
    291 Md. 1
    , 11 (1981). “Because special exceptions are legislatively-created within the
    comprehensive zoning regulatory scheme, they enjoy the presumption of correctness[.]”
    Mayor & City Council of Rockville v. Rylyns Enters., Inc., 372 Md. at 542. Accordingly,
    the applicant for a special exception need not make any showing of a change or mistake.
    Id. at 543.
    In Maryland, “[d]issatisfaction with the relative inflexibility of Euclidian zoning”
    also “gave rise to the use of ‘floating zones[,]’” which occupy “the far end of the
    flexibility continuum of zoning categories from Euclidean zones.” Mayor & City
    Council of Rockville v. Rylyns Enters., Inc., 372 Md. at 540 n.15. Under this device, “the
    local zoning authority establishes in its zoning ordinance a specific zoning classification
    for a specific purpose or a class of purposes, but does not assign on the zoning map the
    classification to any property[.]” Zimmer, 444 Md. at 515. This type of zone is said “to
    ‘float’ above the local jurisdiction to which the zone may be applied through the grant of
    piecemeal zoning map amendment[.]” Id. at 516.13
    “Although the processing, review, and grant of a floating zone follows usually the
    same quasi-judicial process as Euclidian piecemeal rezonings, the change-mistake rule
    13
    Generally, the Court of Appeals has described a floating zone as “a special
    detailed use district of undetermined location, a district in which the proposed kind,
    location, size and form of structures must be pre-approved, and which, like a special
    exception use, is legislatively predeemed compatible with the areas in which it may
    thereafter be located on a particular application, provided specified standards are gratified
    and actual incompatibility is not revealed.” Chatham Corp. v. Beltram, 
    243 Md. 138
    ,
    149-50 (1966).
    40
    does not apply” to a floating zone application. Zimmer, 444 Md. at 516. “To rezone a
    property to a floating zone, the zoning authority must find generally that the legislative
    prerequisites for the zone are met and the rezoning is compatible with the surrounding
    neighborhood (much as required to grant a special exception).” Id. This showing
    “‘replaces the usual proof of change or mistake[.]’” Mayor & Council of Rockville v.
    Rylyns Enters., Inc., 372 Md. at 540 n.15 (quoting Richmarr Holly Hills, Inc. v. American
    PCS, L.P., 
    117 Md. App. 607
    , 640 (1997)). While mechanisms such as special
    exceptions and floating zones “give increased flexibility to zoning regulatory schemes,
    protection against abuse is provided by the fact that the specific requirements and
    available alternatives for each mechanism must be spelled out in detail as a part of the
    comprehensive zoning ordinance, and thus cannot be ‘made-up’ out of convenience or
    expediency on a case-by-case basis.” Mayor & Council of Rockville v. Rylyns Enters.,
    Inc., 372 Md. at 537-38.
    B.     Potential Applicability of the Change-Mistake Rule
    In the present appeal, the City of Hyattsville highlights the distinction between
    Euclidean zones and floating zones. The City asserts that, under Maryland law, a
    showing of either a change or mistake is required for piecemeal rezoning of a property,
    except when the zoning authority grants a floating zone. The City argues that, in this
    case, the District Council did not grant a floating zone. The City concludes, therefore,
    that the District Council could not change the zoning of the lower parcel absent a
    showing of either a change or mistake.
    Elaborating on its argument, the City explains that the 2004 sectional map
    41
    amendment, an instance of comprehensive rezoning, established existing zoning
    classifications for the subject property, which are presumptively correct. The sectional
    map amendment left the upper parcel in the R-55 zone and placed the lower parcel in the
    O-S zone. The City observes that “the O-S and R-55 designations are undoubtedly
    Euclidian zoning designations.” The City explains that, in the present case, the District
    Council “changed the underlying Euclidean zone of the lower parcel” from the O-S zone
    to the R-55 zone. According to the City, therefore, this change from one Euclidean zone
    to another required a showing of either a substantial change since the sectional map
    amendment or a mistake of fact made in the adoption of the sectional map amendment.
    As the City acknowledges, the sectional map amendment did more than merely
    establish ordinary, Euclidean zones for both parcels. The sectional map amendment also
    imposed an overlay zone known as the development district overlay (D-D-O) zone over
    the subject property, as well as the rest of the Gateway Arts District. Generally, “the
    overlay zone concept has been described as ‘a mapped . . . district superimposed on one
    or more established zoning districts[,]’” which “‘may be used to impose supplemental
    restrictions on uses in these districts, permit uses otherwise disallowed, or implement
    some form of density bonus or incentive zoning program.’” Cox v. Prince George’s
    County, 
    86 Md. App. 179
    , 191 (1991) (quoting 1 Edward H. Ziegler, Rathkopf’s The Law
    of Zoning and Planning (4th ed. 1990)). A property located in an overlay zone is
    “simultaneously in two zones[,]” both the overlay zone and the underlying zone. Cox v.
    Prince George’s County, 86 Md. App. at 183 n.1.
    The D-D-O zone is one of several overlay zones established in the Prince
    42
    George’s County zoning ordinance. See PGCC § 27-109(a)(7). The D-D-O zone “is
    intended to ensure that the development of land in a designated development district
    meets the goals established for the district in a Master Plan, Master Plan Amendment, or
    Sector Plan, and takes advantage of unique opportunities presented by the district.”
    PGCC § 27-548.19. The D-D-O zone is “a mapped zone which is superimposed by a
    Sectional Map Amendment (SMA) over other zones in a designated development district,
    and may modify development requirements within the underlying zones.” Id. In other
    words, the D-D-O zone is “placed over other zones on the Zoning Map, and may modify
    specific requirements of those underlying zones.” PGCC § 27-548.21.
    In its appellate brief, the City argues that the D-D-O zone does not satisfy the
    definition of a floating zone. The City emphasizes that floating zones have an
    “undetermined location” until a property owner applies for the floating zone
    classification. The City argues that the D-D-O zone, unlike a floating zone, is “a mapped
    zone that is demarcated on the relevant zoning map[.]” The City concludes that, because
    the D-D-O is not a floating zone, the decision here does not fit the floating zone
    exception to the change-mistake rule. In the City’s view, the District Council “essentially
    crafted an alternative exception to the change-mistake rule,” which, the City argues, is
    not recognized under Maryland case law.
    In response, Werrlein insists that the D-D-O zone “is the very definition of a
    floating zone, in that it has no specific location, but allows property owners to apply for
    the designation[.]” Werrlein’s suggestion that an owner of the subject property applied
    for the D-D-O zone designation is inaccurate. Neither Werrlein nor the previous owners
    43
    applied to designate the subject property as part of the D-D-O zone. The District Council
    placed the property in the D-D-O zone when it adopted the sectional map amendment in
    2004, as part of the comprehensive rezoning of the development district covering the City
    of Hyattsville and other municipalities. The parcels were already in the D-D-O zone
    when, in 2018, Werrlein requested changes to the underlying Euclidean zones.
    For its part, the District Council appears to recognize (at least tacitly) that the D-
    D-O zone does not meet the definition of a floating zone. The District Council observes
    that, in the second amended application, Werrlein asked to change the underlying zones
    of both parcels to the Mixed Use – Infill (M-U-I) zone, which the District Council says is
    a floating zone.14 In the proceedings below, the District Council rejected the request for
    reclassification to the M-U-I zone and instead approved rezoning the lower parcel from
    the O-S zone to the R-55 zone and changing the list of allowed uses to permit
    townhouses. In this regard, the District Council argues that it followed the legislative
    “requirements to amend the Overlay zone” set forth in PGCC § 27-548.26(b). The
    District Council suggests that these requirements are sufficiently similar to the
    requirements of a floating zone application that the change-mistake rule should not
    govern this type of rezoning decision.
    14
    The District Council cites PGCC § 27-546.16(b)(2), which states: “Property in
    the D-D-O zone may be reclassified from its underlying zone to the M-U-I Zone through
    the property owner application process in [PGCC §] 27-548.26(b). In the review process,
    the owner shall show that the proposed rezoning and development will be compatible
    with existing or approved future development on adjacent properties.”
    44
    C.     Legislatively Created Criteria for Amendments in the D-D-O Zone
    The record shows that the District Council made its decision under the premise
    that the relevant approval criteria were the criteria set forth in PGCC § 27.548.26(b) for
    approving amendments to the approved overlay zone, rather than the change-mistake
    requirement.15 As mentioned previously, PGCC § 27-548.26(b)(1)(B) provides that the
    owner of property in the approved development district overlay (D-D-O) zone may
    “request changes to the underlying zones or the list of allowed uses, as modified by the
    Development District Standards.” Such a request “may include requested amendments to
    the applicable Development District Standards for the applicable D-D-O Zone.” PGCC §
    27-548.26(b)(1)(B)(ii).
    To approve an application, the District Council must “find that the proposed
    development conforms with the purposes and recommendations for the Development
    District, as stated in the Master Plan, Master Plan Amendment, or Sector Plan, meets
    applicable site plan requirements, and does not otherwise substantially impair the
    implementation of any comprehensive plan applicable to the subject development
    15
    During the second hearing before the District Council, one of the Eisen parties
    argued that the application should be denied because Werrlein made no showing that the
    District Council was “in error” when it rezoned the lower parcel during the 2004
    comprehensive rezoning or that “the characteristics of the surrounding community ha[d]
    changed” since the comprehensive rezoning. A staff member advised the District
    Council, however, that the change-mistake rule was inapplicable. The staff member
    opined that the applicable criteria were those set forth in the County zoning ordinance for
    approving zoning changes for properties located in the development district overlay zone.
    Specifically, the staff member advised the District Council “to look at whether or not” the
    requested zoning changes would “comport[] with the purposes and guidelines” for the
    development district.
    45
    proposal.” PGCC § 27-548.26(b)(5). To approve requested “amendments to the
    Development District Standards,” the District Council must “find that the amended
    standards will benefit the proposed development, will further the purposes of the
    applicable Development District, and will not substantially impair implementation of any
    applicable Master Plan or Sector Plan.” PGCC § 27-548.26(b)(1)(B)(ii).
    In sum, PGCC § 27-548.26(b) establishes specific criteria for approving certain
    zoning changes for properties located in the legislatively approved D-D-O zone, without
    any direct or indirect reference to a change-mistake requirement. On its face, this
    provision purports to authorize the District Council to change the underlying zone for a
    particular property in the D-D-O zone, without any need to show a change or mistake.
    This provision includes no indication that, in addition to these criteria, an applicant must
    also prove the existence of a change in the surrounding neighborhood or mistake in the
    existing zoning classification. The District Council’s decision to ignore the change-
    mistake rule, in favor of the approval criteria set forth in PGCC § 27-548.26(b), appears
    correct, at least as far as it concerned the interpretation of the zoning ordinance.16
    What the City calls an “exception to the change-mistake rule” was not simply
    conjured up during this quasi-judicial proceeding. The “exception” used here is part of
    16
    Separate provisions of the zoning ordinance generally permit requests for
    piecemeal zoning map amendments in any “conventional zone.” See PGCC § 27-143.
    The term “conventional zone” does not include overlay zones, such as the D-D-O zone.
    See PGCC § 27-109(c). In a conventional zone, the District Council may not approve a
    map amendment unless the applicant proves the existence of a “substantial change in the
    character of the neighborhood” or “a mistake” in either the “original zoning” or “current
    Sectional Map Amendment.” PGCC § 27-157(a)(1).
    46
    the zoning ordinance itself, a defined feature of this particular overlay zone. When the
    District Council, acting in its legislative capacity, created the D-D-O zone classification
    in 2000, it also created this mechanism for changing the underlying zones and list of
    allowed uses for properties located in this overlay zone. See County Council for Prince
    George’s County Bill 8, 2000 Legislative Session (CB-8-2000). This mechanism seems
    to be a legislatively created tool to provide flexibility. Indeed, one of the express
    purposes of the D-D-O zone is “[t]o provide flexibility within a regulatory framework to
    encourage innovative design solutions[.]” PGCC § 27-548.20(a)(2).17 The provisions
    permitting certain zoning changes within the approved D-D-O zone sacrifice some of the
    stability of Euclidean zoning, in favor of advancing other goals for a particular
    development district, as set forth in a comprehensive plan for that district.
    Because this mechanism is “legislatively-created within the comprehensive zoning
    17
    The “specific purposes” of the D-D-O zone are:
    (1) To provide a close link between Master Plans, Master Plan
    Amendments, or Sector Plans and their implementation;
    (2) To provide flexibility within a regulatory framework to encourage
    innovative design solutions;
    (3) To provide uniform development criteria utilizing design standards
    approved or amended by the District Council;
    (4) To promote an appropriate mix of land uses;
    (5) To encourage compact development;
    (6) To encourage compatible development which complements and
    enhances the character of an area;
    (7) To promote a sense of place by preserving character-defining features
    within a community;
    (8) To encourage pedestrian activity; [and]
    (9) To promote economic vitality and investment.
    PGCC § 27-548.20(a).
    47
    regulatory scheme,” it is entitled to a “presumption of correctness[.]” Mayor & Council
    of Rockville v. Rylyns Enters., Inc., 372 Md. at 542. It is not obvious why this
    mechanism should be seen as more objectionable than an ordinance creating a floating
    zone. The Court of Appeals’ long-held rationale for upholding the use of floating zones,
    without any showing of change or mistake, has little to do with the fact that floating
    zones begin as unmapped zones. Rather, the Court of Appeals has upheld the use of
    floating zones because the Court has recognized that the process that a legislative body
    establishes for approving floating zone applications resembles, in important respects, the
    process for approving special exceptions. See Mayor & Council of Rockville v. Rylyns
    Enters., Inc., 372 Md. at 540 n.15 (collecting cases).
    The Court of Appeals originally approved the use of floating zones in Huff v.
    Board of Zoning Appeals of Baltimore County, 
    214 Md. 48
     (1957).18 In that case, the
    Court upheld the reclassification of a property from a residential classification to
    “Manufacturing, Restricted,” a zoning classification created by the County government
    two years previously. 
    Id. at 51
    . The local zoning ordinance authorized property owners
    to petition for the designation, subject to administrative review of development plans to
    ensure conformance with certain development standards and compatibility with the
    surrounding properties. 
    Id. at 55-56
    . The Court reasoned that the enactment of an
    ordinance authorizing property owners to apply for the new zoning classification
    18
    The Huff opinion does not use the term “floating” zone. Subsequent opinions
    explain that the type of zone analyzed in Huff was a floating zone. E.g. People’s Counsel
    for Baltimore County v. Loyola Coll. in Md., 
    406 Md. 54
    , 80 (2008); Beall v.
    Montgomery County Council, 
    240 Md. 77
    , 90-91 (1965).
    48
    “raise[d] a strong presumption that the [enactment] was correct[,]” and that the
    challengers bore the burden “to show . . . that it was wrong.” Id. at 59.
    The Court observed that the standards established for approval of the floating
    manufacturing zone were “as definite and specific and as extensive as those governing
    special exceptions . . . , if not more so[.]” Huff v. Board of Zoning Appeals of Baltimore
    County, 
    214 Md. at 62
    . The Court explained that, “as in the case of a special exception,
    there has been a prior legislative determination, as part of a comprehensive plan, that the
    use which the administrative body permits, upon application to the particular case of the
    specified standards, is prima facie proper for the environment in which it is permitted.”
    
    Id.
     Accordingly, the Court concluded that “the Manufacturing, Restricted classification
    [was] analogous to a special exception,” and that “the rules which are applicable to
    special exceptions . . . , not the general rules of original error or change in conditions of
    the character of the neighborhood, . . . control the propriety of rezoning.” 
    Id.
    The Court of Appeals later gave the following summary of the rationale of Huff
    and the cases that followed Huff:
    The floating zone is different from the establishment of an Euclidean
    zone in that it is initiated on the instigation of a land owner within the
    district rather than that of the legislative body. While this opens an avenue
    of attack on the basis that the action is taken for the benefit of an individual
    land owner rather than for the good of the community as a whole, this
    criticism is blunted by the fact that the floating zone is subject to the same
    conditions that apply to safeguard the granting of special exceptions, i.e.,
    the use must be compatible with the surrounding neighborhood, it must
    further the purposes of the proposed reclassification, and special
    precautions are to be applied to insure that there will be no discordance
    with existing uses. These precautions include such restrictions as building
    location and style, the percentage of the area covered by the building,
    minimum green area, minimum and maximum area of the use, minimum
    49
    setback from streets and other uses, requirement that a site plan be
    approved, and a provision for revocation of the classification if the
    specified restrictions are not complied with.
    Bigenho v. Montgomery County Council, 
    248 Md. 386
    , 391 (1968).
    The mechanism used here, PGCC § 27-548.26(b)(1)(B), permits changes to the
    underlying zone or list of allowed uses for properties in the approved D-D-O zone, an
    area predetermined by the legislative body, provided that the proposed changes meet
    certain standards. Specifically, an application may not be approved unless the District
    Council finds “that the proposed development conforms with the purposes and
    recommendations for the Development District, as stated in the Master Plan, Master Plan
    Amendment, or Sector Plan, meets applicable site plan requirements, and does not
    otherwise substantially impair the implementation of any comprehensive plan applicable
    to the subject development proposal.” PGCC § 27-548.26(b)(5). If granted, the zoning
    change affects only the underlying zone of the property; the property remains in the D-D-
    O zone, subject to the requirements of that zone. Consequently, new development on the
    property remains subject to the approval of a detailed site plan, to ensure compliance with
    the applicable development standards. Overall, this process incorporates safeguards
    designed to ensure that zoning changes approved under this process will be in accordance
    with the applicable comprehensive plans and will be compatible with the surrounding
    neighborhood.
    We conclude that the process that the District Council has established for
    approving certain amendments in the D-D-O zone is sufficiently analogous to the process
    for applying for a floating zone or special exception that it is an appropriate exercise of
    50
    the District Council’s zoning powers. Accordingly, the District Council did not err when
    it evaluated the application under the criteria set forth in PGCC § 27-548.26(b), instead of
    requiring a showing of either a change in the surrounding area or mistake in the existing
    zoning classification.
    III.   Role of the Sector Plan in the Rezoning Decision
    In a separate argument, the City of Hyattsville observes that the 2004 sectional
    map amendment rezoned the lower parcel from the R-55 (One-Family Detached
    Residential) zone to the O-S (Open Space) zone. The City argues that the subsequent
    decision to rezone the lower parcel to the R-55 zone and to allow townhouses on the
    property is “inherently inconsistent” with the 2004 sector plan.
    In its appellate brief, the City quotes various statements from the sector plan
    describing the “traditional residential neighborhood (TRN) character area” of the
    Gateway Arts District. For instance, the sector plan states that “[t]raditional residential
    neighborhood character areas overlay land zoned for attached and detached single-family
    housing development.” 2004 Approved Sector Plan and Sectional Map Amendment, at
    138. The “[g]oal[s]” of this character area are: to “promote development of both family-
    and artist-oriented residential development in the R-55, R-35, R-20, and R-T Zones”; to
    “preserve the single-family residential neighborhood character as the anchor of the Arts
    District, while supporting artists who produce and teach from their homes”; and to
    “enhance the ‘built-in’ natural surveillance of public areas by active neighbors on
    porches, in yards, and on the sidewalk.” Id. According to the sector plan, “[t]his
    development character reinforces the existing single-family detached residential
    51
    neighborhoods as calm, low-traffic, and child-safe.” Id. The City contends here that
    rezoning the subject property from O-S to R-55 and allowing townhouses on the property
    contravenes the “intent” of the sector plan, as described in these and other statements.
    The City does not elaborate on its premise that a purported “inconsisten[cy]”
    between a piecemeal rezoning decision and a sector plan is, by itself, a ground to reverse
    that decision. In the context of land-use regulation, “plans, which are the result of work
    done by planning commissions and adopted by ultimate zoning bodies, are advisory in
    nature and have no force of law absent statu[t]es or local ordinances linking planning and
    zoning.” Mayor & Council of Rockville v. Rylyns Enters., Inc., 
    372 Md. 514
    , 530 (2002).
    “Proposals for land use contained in a plan” such as the 2004 sector plan “constitute a
    non-binding advisory recommendation, unless a relevant ordinance or regulation, or
    specific zoning, subdivision, or other land use approval, make compliance with the plan
    recommendations mandatory.” County Council of Prince George’s County v. Zimmer
    Dev. Co., 
    444 Md. 490
    , 522 (2015) (citing Maryland-National Capital Park & Planning
    Comm’n v. Greater Baden-Aquasco Citizens Ass’n, 
    412 Md. 73
    , 98-101 (2009)).
    The City’s appellate brief does not identify any provision of the local zoning
    ordinance which might make the “intent” of the sector plan the controlling factor in
    subsequent rezoning decisions. In its reply brief, however, the City calls attention to
    PGCC § 27-548.26(b)(5), which sets forth criteria for approving applications to change
    the underlying zone or list of allowed uses for properties located in the D-D-O zone.
    This provision defines a specific role for the sector plan in the application process.
    As mentioned previously, PGCC § 27-548.26(b)(5) states that, to approve an
    52
    application and site plan, the District Council must “find that the proposed development
    conforms with the purposes and recommendations for the Development District, as stated
    in the Master Plan, Master Plan Amendment, or Sector Plan, meets applicable site plan
    requirements, and does not otherwise substantially impair the implementation of any
    comprehensive plan applicable to the subject development proposal.” Similarly, PGCC §
    27-548.26(b)(1)(B)(ii) states that, to approve any requested amendments to the
    Development District Standards, the District Council must “find that the amended
    standards will benefit the proposed development, will further the purposes of the
    applicable Development District, and will not substantially impair implementation of any
    applicable Master Plan or Sector Plan.”
    In its final decision, the District Council made express findings that the requested
    zoning changes and proposed development satisfied the criteria set forth in these two
    provisions. The District Council stated that rezoning the lower parcel and “allow[ing] 9
    dwelling units per acre . . . for single-family attached units and 6.7 dwelling units per acre
    (as permitted in R-55) for single-family detached units” would “benefit the proposed
    development,” would “further the purposes of the Development District,” and would “not
    substantially impair the implementation” of the 2004 sector plan or the applicable master
    plan. The District Council further concluded that “rezoning a portion of the property to
    R-55, to facilitate R-55 development of the entire 8.26 acres,” would “further the
    purposes of the development district,” would “conform with the purposes and
    recommendations for the development district,” would “satisf[y] the site design
    guidelines[,]” and would “not otherwise substantially impair the implementation” of the
    53
    2004 sector plan or the applicable master plan.
    In explaining those conclusions, the District Council stated that, in general, “R-55
    zoning is recommended for any infill development that will preserve the traditional
    single-family residential neighborhood character in the [traditional residential
    neighborhood] area.” The District Council observed that the subject property sits
    between neighboring properties with three types of existing uses: detached single-family
    residences, multi-family apartment buildings, and a public park. The District Council
    reasoned that rezoning the lower parcel to R-55 would “allow redevelopment of an
    under-utilized property into a residential subdivision, with a mix of single-family
    detached and attached dwelling units” which would “be compatible with the surrounding
    neighborhood.” The District Council emphasized that the proposal stood in “stark
    contrast to the abandoned WSSC headquarters and parking lot” already located on the
    subject property, which was “not compatible with the surrounding residential
    neighborhood.”
    The City of Hyattsville disagrees with the District Council’s conclusions, asserting
    that the decision to approve the application “impairs the implementation of the Sector
    Plan” and is “inconsistent with the Sector Plan’s goals, purposes, and recommendations.”
    When reviewing zoning decisions, however, “the reviewing court should not ‘zone or
    rezone or [] substitute its judgment for that of the zoning authority if the action of the
    zoning authority is based on substantial evidence and the issue is thus fairly debatable.’”
    Cremins v. County Comm’rs of Washington County, 
    164 Md. App. 426
    , 438 (2005)
    (quoting Montgomery County v. Greater Colesville Citizens’ Ass’n, 
    70 Md. App. 374
    ,
    54
    381 (1987)) (further quotation marks omitted). “There is substantial evidence to support
    the zoning agency’s conclusion if ‘reasoning minds could reasonably reach [the]
    conclusion from facts in the record[.]’” Cremins v. County Comm’rs of Washington
    County, 164 Md. App. at 438 (quoting Stansbury v. Jones, 
    372 Md. 172
    , 182-83 (2002)).
    In our assessment, it was at least fairly debatable that the requested zoning
    changes and proposed development would conform with the purposes and
    recommendations for the development district, as stated in the sector plan, and would not
    otherwise substantially impair the implementation of the sector plan. It is obvious that
    assigning a property to the R-55 zone is compatible with the goal of “promot[ing]
    development of both family and artist-oriented residential development in the R-55”
    zone. It is equally obvious that a proposal to replace a vacant government building and
    parking lot with single-family homes directly advances the goal of promoting single-
    family residential development. The sector plan expressly mentions that the traditional
    residential neighborhood character area includes “land zoned for attached and detached
    single-family housing development.” 2004 Approved Sector Plan and Sectional Map
    Amendment, at 138. In addition, the Development District Standards for the traditional
    residential neighborhood character area include specific standards for townhouses.
    Accordingly, adding townhouses to the list of allowed uses, so as to permit the
    development of a mix of both detached single-family houses and townhouses, does not
    55
    inherently conflict with the vision described in the sector plan.19 Based on the evidence
    presented, one could reasonably conclude that Werrlein’s proposal would advance the
    goals and recommendations outlined in the sector plan for this area.
    Arguing for a contrary conclusion, the City focuses on one specific statement from
    the 2004 Approved Sector Plan and Sectional Map Amendment. The “Implementation”
    part of that document includes a “Sectional Map Amendment” section, which made
    zoning changes to various properties in the Gateway Arts District. The stated rationale
    for rezoning the lower parcel at that time was: “Rezoning to O-S creates the opportunity
    to expand parkland and reinforce the vision of the traditional residential neighborhood
    character area [of the Gateway Arts District].” 2004 Approved Sector Plan and Sectional
    Map Amendment, at 123.
    This statement is more accurately regarded as part of the sectional map
    amendment, which implements the sector plan, rather than part of the sector plan itself.
    In any event, in assessing Werrlein’s application, the District Council concluded that the
    proposal was consistent with the goal of expanding parkland. The District Council noted
    that the development proposal specified that, “[w]hen rezoned to R-55, only 2.8 acres” of
    the lower parcel “w[ould] be developed with dwelling units[,]” and that Werrlein would
    “transfer the remaining 1.8 acres of the parcel to the City of Hyattsville for open
    space/parkland[.]” (Emphasis in original.) The District Council reasoned that this aspect
    19
    The District Council characterized the townhouses as a “transition” area of sorts,
    between the existing multi-family apartment buildings on one side of the subject property
    and the existing detached single-family homes on another side of the subject property.
    56
    of the development proposal would “implement the Plan’s vision to expand parkland and
    reinforce the vision of the traditional residential neighborhood character area.” That
    conclusion was at least fairly debatable.
    The City of Hyattsville also contends that, in deciding to change the zoning
    classification of the lower parcel, the District Council “failed to give adequate weight to
    the presumption that the zoning designations” established by the comprehensive rezoning
    “were correctly determined and valid.”20 This argument misapprehends the role that the
    presumption of correctness plays in the process established by PGCC § 27-548.26(b). In
    this context, the effect of the presumption of correctness is simply that the applicant bears
    the burden of affirmatively establishing that any proposed zoning changes meet the
    criteria for approval set forth in the zoning ordinance. The District Council’s express
    findings that Werrlein’s proposal met the criteria set forth in PGCC § 27-548.26(b)(5)
    and (b)(1)(B)(ii) serve as a finding that Werrlein had overcome the presumption of
    correctness. The District Council here, by focusing its decision on those criteria, properly
    employed the presumption of correctness.21
    20
    The City offers no hint as to what kind of showing would, in the City’s view, be
    adequate to rebut the presumption of correctness, short of a showing of a change since the
    comprehensive rezoning or a mistake in the comprehensive rezoning. The City’s
    argument about the presumption of correctness appears to be little more than a
    restatement of the argument that the applicant was required to show a change or mistake.
    21
    To be more exact, the presumption of correctness plays multiple roles here. One
    must presume that the District Council was correct when it assigned the lower parcel to
    the O-S zone in 2004. One must also presume that the District Council was correct when
    it assigned the property to the D-D-O zone during that same 2004 rezoning. Furthermore,
    one must presume that the District Council was correct when, in 2000, it enacted the
    ordinance creating the procedure for making certain changes in the approved D-D-O
    57
    Ultimately, the District Council’s conclusions withstand scrutiny under the
    standard for judicial review of administrative decisions. Based on the evidence
    presented, the District Council could reasonably conclude that rezoning the lower parcel
    and changing the list of allowed uses would conform with the purposes and
    recommendations for the development district, as stated in the sector plan, and would not
    substantially impair the implementation of the sector plan. Because substantial evidence
    in the record supported those conclusions, there is no basis for a court to substitute its
    judgment for that of the District Council.
    IV.    Change to List of Allowed Uses and Density Regulations
    In their appeal, the Eisen parties contend that the District Council violated the
    Prince George’s County zoning ordinance by allowing the development of townhouses
    on the subject property and by allowing a density of nine dwelling units per acre for
    townhouses. They present a two-tiered challenge to those decisions:
    1.     Did the District Council’s decision to authorize development of 72
    dwelling units including Townhouses, at up to nine (9) units per gross acre,
    violate the Zoning Ordinance?
    A.     If both properties are zoned R-55, did the decision to
    authorize 72 dwelling units including Townhouses, at up to nine (9)
    units per gross acre, violate the Zoning Ordinance?
    B.     If the rezoning of the lower parcel to R-55 was unlawful and
    the parcel remains in the O-S zone, did the decision to authorize 72
    zone. The 2004 decision that the lower parcel should have an overlay zone of D-D-O and
    an underlying zone of O-S necessarily includes a decision that the underlying O-S zone
    was subject to the change if the property owner could show that the change would satisfy
    the criteria set forth in PGCC § 27-548.26(b).
    58
    dwelling units including Townhouses, at up to nine (9) units per
    gross acre, violate the Zoning Ordinance?
    Although the Eisen parties assert that the District Council’s decision to rezone the
    lower parcel was “unlawful,” the Eisen parties provide no independent argument in
    support of that position. To the extent that the Eisen parties are challenging the rezoning
    of the lower parcel, they appear to rely on arguments made by the City of Hyattsville.
    For the reasons discussed above, we have rejected the City’s challenges to the rezoning
    decision. Consequently, we need not address the portions of the Eisen parties’ argument
    that presume that rezoning the lower property to the R-55 zone is invalid.
    A.     Authority to Change List of Allowed Uses and Density Regulations
    The Eisen parties focus not on the zoning change itself, but on the decisions to
    change the list of allowed uses and to modify the density regulations. The Eisen parties
    contend that, if both parcels have an overlay zone of D-D-O and an underlying zone of R-
    55, then the property remains “subject to the use and density limitations” of the R-55
    zone. According to the Eisen parties, the Development District Standards of the D-D-O
    zone simply “do not apply” to the subject property, because of a special exemption in the
    enactment creating the D-D-O zone. Under their theory, even though the zoning
    ordinance generally authorizes changes to the list of allowed uses and density regulations
    for properties in the D-D-O zone, that provision does not authorize those types of
    changes for this particular property.
    Under the Prince George’s County zoning ordinance, “Development District
    Standards” of a D-D-O zone serve as the means through which the District Council may
    59
    modify development requirements of the underlying zone. These Development District
    Standards must be stated in the sectional map amendment establishing the D-D-O zone.
    PGCC § 27-548.24(c). The enactment establishing the D-D-O zone must incorporate a
    “table of uses . . . showing all uses in the underlying zone that will be permitted,
    prohibited, or otherwise restricted” through those Development District Standards.
    PGCC § 27-548.22(f).
    For properties in the D-D-O zone, the uses allowed on the property and other
    regulations, including density regulations, are the same as those of the underlying zone,
    except as modified by the Development District Standards. PGCC §§ 27-548.22(a), 27-
    548.23(a). “Development District Standards may allow uses prohibited in the underlying
    zone where the uses are compatible with the goals of the Development District and
    purposes of the D-D-O Zone.” PGCC § 27-548.22(e). To achieve the goals of the
    development district and the purposes of the D-D-O zone, Development District
    Standards “may modify density regulations” of the underlying zone, may specify
    “location, size, height, design, lot coverage of structures, parking and loading, signs, open
    space, and other regulations,” and may include requirements for “specific landscaping,
    screening, and buffering[.]” PGCC § 27-548.23(b)-(d).
    The 2004 enactment establishing the Gateway Arts District D-D-O zone includes a
    section titled “Development District Standards.” 2004 Approved Sector Plan and
    Sectional Map Amendment, at 135-56. This section of the document includes a 13-page
    table of “Standards” for each character area of the development district, which are
    organized into standards for “Site Design,” “Building Design,” and “Public Space.” Id.
    60
    at 144-56. To use one example, the site design standards for the traditional residential
    neighborhood character area state that townhouses “shall have a minimum lot width of 18
    feet and shall not front a parking lot.” Id. at 146. To use another example, the building
    design standards for the traditional residential neighborhood character area state that the
    “maximum height of townhouse buildings shall be 45 feet.” Id. at 151.
    A separate section of the document is titled “Uses Permitted.” 2004 Approved
    Sector Plan and Sectional Map Amendment, at 167-99. This section includes a table
    specifying whether a particular use is permitted, permitted with a special permit, or
    prohibited in each character area. For instance, one-family detached dwellings are
    generally permitted throughout the traditional residential neighborhood character area.
    Id. at 195. Townhouses are permitted in the traditional residential neighborhood
    character area if that use is allowed in the underlying zone. Id. at 196. In the present
    case, the District Council granted a request to change the list of allowed uses, so as to
    allow townhouses on the subject property.
    In their appeal, the Eisen appellants rely heavily on a footnote attached to the top
    line of the table of “Standards” for this D-D-O zone. The footnote states: “R-55 zoned
    properties in the TRN character area within the incorporated City of Hyattsville are
    exempt from the development standards and will abide by the requirements of the R-55
    Zone.” 2004 Approved Sector Plan and Sectional Map Amendment, at 144 n.2. The
    Eisen parties refer to this footnote as the “Hyattsville Exemption.” The Eisen parties
    assert that, after the rezoning of the lower parcel, the entire subject property qualifies for
    this exemption, because it: has an underlying zoning classification of R-55; is located in
    61
    the traditional residential neighborhood character area of the D-D-O zone; and is located
    within the City of Hyattsville.
    The Eisen parties theorize that this footnote reaches far beyond the “Standards”
    table in which it appears. According to their theory, this exemption from certain
    “development standards” means that properties qualifying for the exemption are exempt
    from any “Development District Standards,” as that term is used in the zoning ordinance.
    They further argue that, if a property qualifies for this exemption, then the District
    Council may not use those Development District Standards to change the allowed uses or
    to modify the density regulations on those properties. They conclude that, because the
    subject property fits within this exemption, the District Council cannot change the list of
    allowed uses or modify the density regulations for the subject property.
    In response to these arguments, the District Council argues that the Eisen parties
    overstate the significance of the footnote in question. The District Council argues that
    the exemption set forth in the footnote “only applies” to the development standards for
    “site design, building design, and public space—not what uses or density are permitted
    in the table of uses.” (Emphasis in original.) We agree.
    In our assessment, the expansive interpretation of the footnote offered by the Eisen
    parties is implausible. The footnote states that certain properties “are exempt from the
    development standards,” but it does not say that those properties are exempt from the
    “Development District Standards,” a term that is defined in the zoning ordinance.22 The
    22
    By contrast, the introduction to the Development District Standards section lists
    ten specific “exemptions from the development district standards.” 2004 Approved
    62
    footnote appears within a 13-page table of “Standards,” which address three categories:
    “Site Design,” “Building Design,” and “Public Space.” The standards included on the
    table do not address the allowed uses of a property, nor do they include any density
    regulations. Rather, a separate section sets forth the “Uses Permitted” in each character
    area. When read in proper context, the phrase “the development standards” in the
    footnote of the “Standards” table refers to the particular standards listed on that table. It
    would be a mistake to equate the phrase “the development standards,” as used in that
    context, to encompass the entire category of “Development District Standards,” within
    the meaning of the zoning ordinance.
    Moreover, even if the footnote did exempt certain properties from the
    “Development District Standards” of the D-D-O zone, this exemption would not prohibit
    the District Council from lifting the exemption. The footnote itself is not part of the
    zoning ordinance. The footnote is included in a table within the Development District
    Standards established for this D-D-O zone. The zoning ordinance authorizes the District
    Council to approve “amendments to the Development District Standards” (PGCC § 27-
    548.26(b)(1)(B)) if the District Council finds that an applicant has satisfied certain
    criteria. Logically, this authority to amend the Development District Standards includes
    the ability to amend a footnote that is included within those Development District
    Standards.
    Sector Plan and Sectional Map Amendment for the Prince George’s County Gateway
    Arts District, at 140. The so-called Hyattsville exemption does not appear on that list.
    See id. at 140-42.
    63
    In fact, in this case, the District Council decided to lift the exemption from the
    property entirely: the District Council decided that, before the issuance of any building
    permit, Werrlein would be required to obtain approval of a detailed site plan, at which
    point the property would be “subject to all Development District Overlay (D-D-O)
    standards applicable to the Traditional Residential Neighborhood Character Area.”23 In
    doing so, the District Council treated the exemption as subject to change through the
    application process under PGCC § 27-548.26(b). We perceive no error in this aspect of
    the decision.
    Accordingly, we reject the contention that the footnote in question operates to
    prohibit changes to the list of allowed uses or to density regulations. The District Council
    was authorized to change the list of allowed uses for the subject property to include
    townhouses, provided that the District Council found that the proposal met the criteria
    listed in PGCC § 27-548.26(b)(5). The District Council was authorized to amend the
    Development District Standards, in order to modify the density regulations for the subject
    property, provided that the District Council found that the proposal met the criteria listed
    in PGCC § 27-548.26(b)(1)(b)(ii). Here, the District Council made those requisite
    findings.
    B.       Modification of Density Regulations
    The Eisen parties further observe that, to the extent that the District Council might
    23
    The District Council had previously acknowledged the existence of the
    exemption in its order of remand, which was incorporated by reference into the final
    decision.
    64
    modify the density regulations applicable to the subject property, the District Council still
    must comply with another limitation from the zoning ordinance. PGCC § 27-548.23(b)
    states: “Development District Standards may not permit density in excess of the
    maximum permitted in the underlying zone.” In its final decision here, the District
    Council decided to allow “9 dwelling units per acre . . . for single-family attached units”
    and “6.7 dwelling units per acre . . . for single-family detached units.” The Eisen parties
    argue that both of these densities exceed the maximum density permitted in the
    underlying R-55 zone.
    The Eisen parties cite PGCC § 27-442(h), which sets forth density regulations for
    properties in each residential zone of the County zoning ordinance. That table expresses
    each density as the “Maximum Dwelling Units Per Net Acre of Net Lot/Tract Area.” Id.
    In the R-55 zone, the maximum density for “[o]ne-family detached dwellings, in general”
    is 6.7 dwelling units per net acre of net lot or tract area. Id. The table includes a separate
    category for “Townhouses,” but it assigns no value for the maximum density of
    townhouses in the R-55 zone (id.), apparently because that use generally is not permitted
    in the R-55 zone, subject to only a few narrow exceptions. See PGCC § 27-441(b).
    In its decision here, the District Council appeared to recognize that the density for
    single-family detached dwelling units could not exceed the maximum density permitted
    in the underlying R-55 zone. The District Council expressed this maximum density as
    “6.7 dwelling units per acre[.]” The Eisen parties point out, however, that this statement
    does not accurately express the maximum density permitted in the R-55 zone, which is
    6.7 single-family detached dwelling units per net acre of net lot or tract area.
    65
    The Eisen parties explain that, throughout the zoning ordinance, “[d]ensity” means
    the “number of ‘Dwelling Units’ per acre of ‘Net Lot Area.’” PGCC § 27-107.01(a)(66).
    The term “Net Lot Area” is defined as the “total contiguous area” of a lot “excluding: (i)
    ‘Alleys,’ ‘Streets,’ and other public ways; and (ii) Land lying within a ‘One Hundred
    (100) Year Floodplain[.]’” PGCC § 27-107.01(a)(161). The Eisen parties observe that,
    throughout its written decisions, the District Council never expressed density in terms of
    dwelling units per net acre. The Eisen parties further note that, whenever the District
    Council discussed the acreage of the property, the District Council uniformly referred to
    estimates of the total area of the property, which includes at least one public street, as
    well as land lying within the 100-year floodplain.
    The Eisen parties conclude that the District Council’s decision to allow “6.7
    dwelling units per acre” exceeds the maximum allowed density of 6.7 dwelling units per
    net acre of net lot or tract area. If the District Council’s decision is read literally to allow
    “6.7 dwelling units per acre,” and not 6.7 dwelling units per net acre of net lot or tract
    area, we must agree with the Eisen parties. The District Council erred in failing to
    express the maximum density for one-family detached dwellings as 6.7 dwelling units per
    net acre of net lot or tract area. In their respective appellate briefs, neither the District
    Council nor Werrlein provide any defense of this aspect of the decision.
    In its final decision, the District Council also decided to modify the applicable
    density regulations “to allow 9 dwelling units per acre” for townhouses. The Eisen
    parties argue that this modification also exceeds the maximum density permitted in the R-
    55 zone. According to the Eisen parties, the “maximum density” or “maximum
    66
    residential density” in the R-55 zone is 6.7 dwelling units per net acre, under PGCC § 27-
    442(h). These assertions are not exactly correct.
    Under PGCC § 27-442(h), there is no singular “maximum density” or “maximum
    residential density” in the R-55 zone. The density allowed for a particular type of
    dwelling unit varies based on the type of dwelling. The table of density regulations lists
    “One-family detached dwellings, in general” and “Townhouses” in separate categories.
    For some residential zones, the maximum density for one-family detached dwellings
    differs from the maximum density for townhouses.24 Thus, it is incorrect to say that 6.7
    dwelling units per net acre is the maximum density for townhouses in the R-55 zone.
    Strictly speaking, the zoning ordinance defines no maximum density for townhouses in
    the R-55 zone. As the District Council states in its brief, the decision here did not exceed
    the maximum density for townhouses in the zoning ordinance, because the ordinance
    includes no maximum density to exceed for townhouses.
    Under circumstances such as these, where the District Council adds a type of
    dwelling unit to the list of allowed uses, and where the underlying zone establishes no
    maximum density for that type of dwelling unit, the District Council must establish one
    in the first instance. Otherwise, the District Council’s authority under PGCC § 27-
    24
    For instance, in the R-20 zone, the maximum density for one-family detached
    dwellings is 6.7 dwelling units per net acre, but the maximum density for townhouses is
    16.33 dwelling units per net acre. PGCC § 27-442(h). In the R-T, R-30, R-30C, R-18,
    and R-18C zones, the maximum density for one-family detached dwellings is 6.7
    dwelling units per net acre, but the maximum density for townhouses is 6.0 dwelling
    units per net acre (or 8.0 dwelling units per net acre for certain townhouses approved
    before November 1, 1996). Id. In the R-T zone, the maximum density in the
    “Townhouse, Transit Village” category is 12.0 dwelling units per net acre. Id.
    67
    548.26(b) to amend the list of allowed uses might be rendered nugatory. In establishing
    such a maximum density, one governing limitation is that the District Council “may
    modify density regulations only to meet the goals of the Development District and the
    purposes of the D-D-O Zone.” PGCC § 27-548.23(b). In addition, to amend
    Development District Standards to set a new maximum density where the zoning
    ordinance prescribes none, the District Council must find that “the amended standards
    will benefit the proposed development, will further the purposes of the applicable
    Development District, and will not substantially impair implementation of any applicable
    Master Plan or Sector Plan.” PGCC § 27-548.26(b)(1)(B)(ii).
    The Eisen parties make no direct challenge to the District Council’s express
    finding that allowing a density of “9 dwelling units per acre” for townhouses satisfied the
    criteria for approving amendments to the Development District Standards. Nevertheless,
    the Eisen parties have established at least one error in the decision to establish a
    maximum density for townhouses. The density that the District Council establishes for
    townhouses should be expressed as a specific number of dwelling units per net acre of net
    lot or tract area. See PGCC §§ 27-107.01(a)(66), 27-442(h). The District Council erred
    to the extent that it approved a density in terms of “dwelling units per acre” rather than
    “net acre,” as required by the zoning ordinance. This error may be significant for a
    property on which the number of net acres may be substantially less than the total acreage
    of the property.
    The Eisen parties contend that the District Council’s error in expressing density as
    a number of dwelling units “per acre” is sufficient to require a reversal of the decision.
    68
    Their adversaries dispute that contention. Werrlein asserts that the District Council’s
    decision regarding density was not “set-in-stone” but “just the first phase of a three-stage
    process.” Werrlein assures us that additional “details” will be “filled in through the
    preliminary plan of subdivision process and the detailed site plan[] process[.]”
    In its brief, the District Council informs us that some of these processes have
    already taken place. The District Council asks this Court to take judicial notice of
    subsequent developments regarding Werrlein’s proposed development on the subject
    property.25 In April 2020, the Planning Board approved a preliminary plan of subdivision
    for the development of “15 single-family detached dwelling units” and “15 townhouses”
    on the upper parcel, with conditions for approving an additional dwelling unit. A petition
    for judicial review of that decision is currently pending in the circuit court in a separate
    case. In June 2020, the Planning Board approved a detailed site plan for the development
    of “15 single-family attached units and 16 single-family detached units” on the upper
    parcel. The District Council later upheld that decision, and no action for judicial review
    of the detail site plan decision remains pending.
    The District Council suggests that these subsequent decisions regarding the upper
    parcel may have eliminated some of the grounds for the Eisen parties’ density objections.
    As we see it, however, the ongoing nature of the development approval process
    demonstrates why the error in establishing the maximum density for the subject property
    25
    In an appendix to its brief, the District Council included copies of various
    documents related to subsequent decisions by the Planning Board and the District
    Council. This Court may take judicial notice of the adjudicative facts reflected in those
    official public documents. See Chesek v. Jones, 
    406 Md. 446
    , 456 n.8 (2008).
    69
    must be corrected. The decision under review here establishes the maximum densities
    that may be allowed on the entire subject property, not just the upper parcel. At all
    subsequent stages for approval of Werrlein’s proposed development, on either parcel, the
    administrative decision-makers will determine whether the proposed development
    actually conforms with the maximum densities established by the District Council’s
    zoning decision. Unless corrected, the error here in overstating the density allowed on
    the property may continue to affect each subsequent decision.26
    In sum, although the zoning ordinance authorized the District Council to change
    the list of allowed uses and to modify density regulations for the property, the District
    Council erred by approving densities in terms of dwelling units “per acre” instead of net
    acre. On remand, the District Council must establish densities for one-family detached
    residences and for townhouses, expressed as a number of dwelling units per net acre of
    net lot or tract area.
    CONCLUSION
    For the reasons stated in this opinion, the District Council’s decision must be
    affirmed in part, but not in its entirety. The decision must be affirmed insofar as it
    changed the underlying zone of the upper parcel from the O-S zone to the R-55 zone.
    The decision must also be affirmed insofar as it changed the list of allowed uses to allow
    townhouses on the subject property.
    26
    The final approval of the detailed site plan for the upper parcel includes a
    condition that, “[p]rior to certification,” the detailed site plan must be revised to
    “[p]rovide a correct Density Calculation Table, in accordance with the approved
    Conceptual Site Plan” that is under review here.
    70
    The decision must be reversed to the extent that it modified the density regulations
    on the subject property to allow “6.7 dwelling units per acre . . . for single-family
    detached units” and “9 dwelling units per acre . . . for single-family attached units.” The
    District Council may not allow a density for one-family detached dwelling units that
    exceeds 6.7 dwelling units per net acre of net lot or tract area. The District Council may
    establish a density for townhouses that is different from the density for one-family
    detached dwelling units, but the District Council may do so only to meet the goals of the
    Development District and the purposes of the D-D-O Zone. The density that the District
    Council establishes for townhouses must be expressed as a number of dwelling units per
    net acre of net lot or tract area.
    JUDGMENT OF THE CIRCUIT COURT
    FOR PRINCE GEORGE’S COUNTY
    VACATED. CASE REMANDED TO THE
    CIRCUIT COURT WITH DIRECTIONS
    TO AFFIRM THE DECISION OF THE
    DISTRICT COUNCIL IN PART, REVERSE
    THE DECISION IN PART, AND REMAND
    THE CASE TO THE DISTRICT COUNCIL
    FOR FURTHER PROCEEDINGS
    CONSISTENT WITH THIS OPINION.
    COSTS TO BE PAID 50% BY THE CITY
    OF HYATTSVILLE, 25% BY THE EISEN
    APPELLANTS, 12.5% BY PRINCE
    GEORGE’S COUNTY, AND 12.5% BY
    WERRLEIN WSSC, LLC.
    71
    APPENDIX A
    APPENDIX B
    The correction notice(s) for this opinion(s) can be found here:
    https://mdcourts.gov/sites/default/files/import/appellate/correctionnotices/cosa/1261s20cn.pdf