Mook v. Bd. of Cty. Comm'rs 18SC499, Bd. of Assessment Appeals v. Kelly 18SC544, Bd. of Cty. Comm'rs v. Hogan ( 2020 )


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    ADVANCE SHEET HEADNOTE
    February 18, 2020
    
    2020 CO 12
    Nos. 18SC434, Mook v. Bd. of Cty. Comm’rs; 18SC499, Bd. of Assessment
    Appeals v. Kelly; 18SC544, Bd. of Cty. Comm’rs v. Hogan—Property Taxation—
    Statutory Interpretation.
    In these three cases, the supreme court considers the definition of
    “residential land” in section 39-1-102(14.4)(a), C.R.S. (2019). “‘Residential land’
    means a parcel or contiguous parcels of land under common ownership upon
    which residential improvements are located and that is used as a unit in
    conjunction with the residential improvements located thereon.” 
    Id. Thus, for
    undeveloped property to qualify as residential land it must be: (1) contiguous with
    residential land; (2) used as a unit with residential land; and (3) under common
    ownership with residential land.
    In Mook, the supreme court considers the contiguity requirement and holds
    that only parcels of land that physically touch qualify as “contiguous parcels of
    land.” In Hogan, the supreme court addresses the “used as a unit” requirement
    and holds that a residential improvement isn’t needed on each contiguous and
    commonly owned parcel of land and that a landowner can satisfy this requirement
    by using multiple parcels of land together as a collective unit of residential
    property. And in Kelly, the supreme court addresses the “common ownership”
    requirement and holds that county records dictate whether properties are held
    “under common ownership.”
    The supreme court affirms the court of appeals’ judgment in Mook, affirms
    the court of appeals’ judgment in Hogan and remands for further proceedings
    consistent with this opinion, and reverses the court of appeals’ judgment in Kelly.
    The Supreme Court of the State of Colorado
    2 East 14th Avenue • Denver, Colorado 80203
    
    2020 CO 12
    Supreme Court Case No. 18SC434
    Certiorari to the Colorado Court of Appeals
    Court of Appeals Case No. 17CA437
    Petitioners:
    Gilbert D. Mook, Trustee; and Carol S. Mook, Trustee,
    v.
    Respondents:
    Board of County Commissioners of Summit County, Colorado and Board of
    Assessment Appeals.
    Judgment Affirmed
    en banc
    February 18, 2020
    *****
    Supreme Court Case No. 18SC499
    Certiorari to the Colorado Court of Appeals
    Court of Appeals Case No. 17CA431
    Petitioners:
    Board of Assessment Appeals and Board of County Commissioners of Summit
    County, Colorado,
    v.
    Respondent:
    Karen L. Kelly, Trustee.
    Judgment Reversed
    en banc
    February 18, 2020
    *****
    Supreme Court Case No. 18SC544
    Certiorari to the Colorado Court of Appeals
    Court of Appeals Case No. 17CA433
    Petitioner:
    Board of County Commissioners of Summit County, Colorado,
    v.
    Respondents:
    Marilyn Hogan and Marc Hogan.
    Judgment Affirmed
    en banc
    February 18, 2020
    Attorneys for Petitioners Gilbert D. Mook and Carol S. Mook; Respondent
    Karen L. Kelly; and Respondents Marilyn Hogan and Marc Hogan:
    Ryley Carlock & Applewhite
    F. Brittin Clayton III
    Denver, Colorado
    2
    Attorneys for Petitioner/Respondent Board of County Commissioners of
    Summit County, Colorado:
    Jeffrey L. Huntley, County Attorney
    Juliane T. DeMarco, Assistant County Attorney
    Franklin Celico, Special Assistant County Attorney
    Breckenridge, Colorado
    Attorneys for Respondent/Petitioner/Amicus Curiae Board of Assessment
    Appeals:
    Philip J. Weiser, Attorney General
    Emmy A. Langley, Assistant Solicitor General
    Krista Maher, Assistant Attorney General
    Evan P. Brennan, Assistant Attorney General
    Denver, Colorado
    Attorneys for Amici Curiae Boards of County Commissioners of the Counties
    of Boulder, Chaffee, Douglas, Eagle, Garfield, Grand, Jefferson, La Plata,
    Larimer, Mesa, Park, Pitkin, Routt, and San Miguel:
    Michael A. Koertje, Boulder County Attorney’s Office
    Boulder, Colorado
    Jennifer A. Davis, Chaffee County Attorney’s Office
    Salida, Colorado
    Dawn L. Johnson, Douglas County Attorney’s Office
    Castle Rock, Colorado
    Christina C. Hooper, Eagle County Attorney’s Office
    Katherine Parker
    Eagle, Colorado
    Katharine Johnson, Garfield County Attorney’s Office
    Glenwood Springs, Colorado
    Christopher Leahy, Grand County Attorney’s Office
    Hot Sulphur Springs, Colorado
    Rebecca Klymkowsky, Jefferson County Attorney’s Office
    Rachel Bender
    Jason Soronson
    Golden, Colorado
    3
    Kathleen L. Moore, La Plata County Attorney’s Office
    Durango, Colorado
    David P. Ayraud, Larimer County Attorney's Office
    Frank N. Haug
    Fort Collins, Colorado
    J. Patrick Coleman, Mesa County Attorney’s Office
    John R. Rhoads
    Andrea Nina Atencio
    Grand Junction, Colorado
    Michow Cox & McAskin LLP
    Christiana McCormick
    Marcus McAskin
    Greenwood Village, Colorado
    Laura C. Makar, Pitkin County Attorney’s Office
    Aspen, Colorado
    Erick Knaus, Routt County Attorney’s Office
    Lynaia South
    Steamboat Springs, Colorado
    Amy T. Markwell, San Miguel County Attorney’s Office
    Telluride, Colorado
    Attorneys for Amici Curiae Colorado Counties, Inc. and the Special Districts
    Association of Colorado:
    Hall & Evans, L.L.C.
    Mark S. Ratner
    Denver, Colorado
    Attorneys for Amicus Curiae Durango School District 9-R:
    Semple, Farrington, Everall & Case, P.C.
    Darryl L. Farrington
    Denver, Colorado
    JUSTICE HOOD delivered the Opinion of the Court.
    4
    ¶1        These three Summit County property tax cases enable us to unravel the
    mysteries of what constitutes “residential land” under section 39-1-102(14.4)(a),
    C.R.S. (2019).
    ¶2        Why is this definition important? Residential land is taxed at a lower rate
    than vacant land. And while we will only explore these three cases (and a
    companion case) today, hundreds of Colorado property owners assert that their
    combinations of residential and vacant parcels qualify as “residential land” under
    section 39-1-102(14.4)(a). They all seek corresponding tax abatements.
    ¶3        Section 39-1-102(14.4)(a) defines residential land as “a parcel or contiguous
    parcels of land under common ownership upon which residential improvements
    are located and that is used as a unit in conjunction with the residential
    improvements located thereon.”
    ¶4        This means that for vacant land to qualify as residential land, it must be:
    (1) contiguous with residential land; (2) used as a unit with residential land; and
    (3) under common ownership with residential land.          We address one of these
    statutory requirements in each case before us today.1
    1   We granted certiorari on the following issues:
    1. In Mook to review: [REFRAMED] Whether properties must be physically
    touching to satisfy the “contiguous parcels” requirement of section
    39-1-102(14.4)(a), C.R.S. (2018).
    5
    ¶5     We conclude as follows:
    • In Mook, we hold that only parcels of land that physically touch qualify
    as “contiguous parcels of land.”
    • In Hogan, we hold that a residential improvement isn’t needed on each
    contiguous and commonly owned parcel of land and that a landowner
    can satisfy the “used as a unit” requirement by using multiple parcels
    of land together as a collective unit of residential property.
    • In Kelly, we hold that county records dictate whether parcels are held
    under “common ownership.”
    I. Facts and Procedural History
    ¶6     We begin by summarizing the facts and procedural history of each case.
    A. Mook
    ¶7     The Mooks own two parcels of land in Summit County. One parcel contains
    the Mooks’ house, and it’s classified as residential land (“the residential parcel”).
    The other parcel is undeveloped, and it’s classified as vacant land (“the subject
    parcel”). The parties agree that these two parcels don’t physically touch—the
    Homeowners’ Association (“HOA”) owns an approximately seventeen-foot-wide
    2. In Hogan to review: [REFRAMED] Whether the court of appeals properly
    construed the “used as a unit” requirement of section 39-1-102(14.4)(a),
    C.R.S. (2018).
    3. In Kelly to review: [REFRAMED] Whether record title of all relevant
    properties must be held by the same person or entity to satisfy the “common
    ownership” requirement of section 39-1-102(14.4)(a), C.R.S. (2018).
    6
    strip of land that completely separates the two properties. That strip provides
    other members of the HOA access to adjacent public land.
    ¶8    The Mooks petitioned the Board of County Commissioners of Summit
    County (“BCC”) to reclassify the subject parcel from vacant land to residential
    land. The BCC denied their petition, and the Mooks appealed to the Board of
    Assessment Appeals (“BAA”). The BAA upheld the BCC’s decision. Notably, the
    BAA determined that contiguous parcels are those that are “physically
    connected.” Here, the residential and subject parcels don’t physically touch, and
    the BAA “was not persuaded that the use of the subject lot in conjunction with the
    residential lot was sufficient to defeat the plain meaning of contiguity.” Thus, the
    BAA concluded that the two parcels aren’t contiguous, and it denied the Mooks’
    appeal.
    7
    ¶9    The Mooks again appealed; however, a unanimous division of the court of
    appeals affirmed the BAA. Mook v. Bd. of Cty. Comm’rs, No. 17CA0437, ¶ 7 (May
    3, 2018).   The division concluded that the plain and ordinary meaning of
    contiguous is “touching along boundaries often for considerable distances.” 
    Id. at ¶
    13 (quoting Contiguous, Webster’s Third New International Dictionary (2002)).
    Accordingly, the division held that for two parcels to be contiguous under section
    39-1-102(14.4)(a), the boundaries of those parcels must touch. 
    Id. Therefore, it
    upheld the BAA’s determination that the subject parcel isn’t contiguous to the
    residential parcel. 
    Id. at ¶
    14.
    ¶10   We granted the Mooks’ petition for certiorari review.
    B. Hogan
    ¶11   The Hogans own three parcels of land in Summit County. Together, these
    parcels form an “L” shape. One parcel contains the Hogans’ house, and it’s
    classified as residential land (“the residential parcel”).
    ¶12   A second parcel directly touches the residential parcel. Part of the Hogans’
    deck extends from their house onto this parcel. Although originally classified as
    vacant land, the Hogans successfully petitioned to reclassify this parcel as
    residential land (“the reclassified parcel”). That reclassification is not before us.
    8
    ¶13    A third parcel directly touches the reclassified parcel. This parcel contains
    an unpaved driveway, but it’s otherwise undeveloped.          This parcel remains
    classified as vacant land (“the subject parcel”).
    ¶14    The Hogans appealed the subject parcel’s classification to the BCC, which
    upheld the vacant-land classification. The Hogans then filed an appeal with the
    BAA.
    ¶15    Both Marc Hogan and the county assessor testified before the BAA
    regarding the Hogans’ use of the subject parcel. Mr. Hogan testified that the
    Hogans use the subject parcel to walk their dog, gather firewood, park vehicles
    and a trailer, and secure scenic views with a privacy buffer. The county assessor
    concluded that the Hogans don’t use the subject parcel as a unit with the
    residential and reclassified parcels. In making that determination, she relied on
    9
    the Assessors’ Reference Library (“ARL”).2 According to the assessor, these ARL
    guidelines required the Hogans to engage in more “active” uses of the property if
    the parcels are to be deemed “used as a unit.” Further, she concluded that the
    subject parcel must contain a residential improvement, which it does not. The
    BAA agreed. The Hogans appealed.
    ¶16   A division of the court of appeals reversed the BAA, holding that the BAA
    erred regarding the “used as a unit” requirement. Hogan v. Bd. of Cty. Comm’rs,
    
    2018 COA 86
    , ¶¶ 1, 14, __ P.3d __. The division first concluded that the two ARL
    guidelines, on which the assessor based her classification, impose requirements
    that exceed section 39-1-102(14.4)(a)’s plain language. See 
    id. at ¶¶
    17–18, 23.
    Further, the division noted that the statute doesn’t require that landowners engage
    in “active” property uses; thus, the BAA erred to the extent it concluded that only
    “active” uses can satisfy the “used as a unit” element. 
    Id. at ¶
    ¶ 29, 35. Finally, the
    division concluded that the statute’s plain language doesn’t require that each
    parcel contain a residential improvement. See 
    id. at ¶
    42. The division therefore
    2The tax code requires the Property Tax Administrator to produce manuals,
    procedures, and instructions to aid assessors in their valuation and assessment of
    property taxes. § 39-2-109(1)(e), C.R.S. (2019). Thus, the Property Tax
    Administrator produces the ARL, which assessors are required to follow.
    Huddleston v. Grand Cty. Bd. of Equalization, 
    913 P.2d 15
    , 17–18 (Colo. 1996).
    10
    remanded this case with directions for the BAA to “employ the correct legal
    standards . . . and redetermine whether the Hogans are entitled to reclassification
    of [the subject parcel].” 
    Id. at ¶
    46.
    ¶17   We granted the BCC’s petition for certiorari review.
    C. Kelly
    ¶18   Karen L. Kelly serves as the trustee for two separate trusts that each own a
    parcel of land in Summit County. A house sits on one parcel, which is classified
    as residential land (“the residential parcel”).          The other parcel remains
    undeveloped, and it’s classified as vacant land (“the subject parcel”). Title to the
    residential parcel is held in a qualified personal residence trust (the Karen L. Kelly
    2011 Irrevocable Trust), while title to the subject parcel is held in a revocable family
    trust (the Karen L. Kelly 1990 Declaration of Trust). Ms. Kelly is the settlor, trustee,
    and beneficiary of each trust.
    ¶19   Ms. Kelly petitioned the BCC to reclassify the subject parcel from vacant
    land to residential land. The BCC denied her petition, and Ms. Kelly appealed to
    the BAA. Ms. Kelly argued that “‘common ownership’ exists whenever there is a
    common thread of ownership or control” between record owners. Thus, as the
    beneficiary of each trust, Ms. Kelly argued that she held the residential and subject
    parcels under common ownership. The BAA disagreed and upheld the BCC’s
    decision. Describing the trusts as two “separate and distinct legal entit[ies],” the
    11
    BAA was “persuaded that the ownership of the subject parcel is separate and
    distinct from the ownership of the adjacent residential lot.”
    ¶20   Ms. Kelly again appealed, and a division of the court of appeals reversed
    the BAA. Kelly v. Bd. of Cty. Comm’rs, 
    2018 COA 81M
    , ¶ 41, __ P.3d __. Focusing
    on the term “ownership,” the division recognized that dictionaries and caselaw
    define that word broadly, in a manner that goes “beyond bare record title and
    instead focuses on who has the power to possess, use, enjoy, and profit from the
    property.” 
    Id. at ¶
    ¶ 14–16. It then noted another court of appeals’ decision, HDH
    Partnership v. Hinsdale County Board of Equalization, 
    2017 COA 134
    , ¶ 11, __ P.3d __,
    rev’d, 
    2019 CO 22
    , 
    438 P.3d 742
    , which addressed how to determine property
    ownership for tax assessment purposes.        Kelly, ¶ 18.   The Hinsdale division
    concluded that record title creates a rebuttable presumption of ownership, but
    courts may look beyond record title to ascertain which party actually “enjoys most
    of the traditional benefits of real property ownership.” See ¶¶ 16, 26. Such
    evidence can establish a non-record owner as the “true owner” of the property
    who should be assessed the property taxes. See 
    id. at ¶¶
    26, 51.
    ¶21   The Kelly division similarly concluded that, while county records establish
    a presumption of ownership, taxpayers may rebut that presumption by
    introducing evidence of “a person’s or an entity’s right to possess, use, and control
    the contiguous parcels.”     ¶¶ 21–22.     Applying that standard, the division
    12
    determined that Ms. Kelly, as the trustee and beneficiary of each trust, enjoyed the
    “traditional benefits of real property ownership” for each parcel. 
    Id. at ¶
    28
    (quoting Hinsdale, ¶ 26).     Therefore, she held the parcels “under common
    ownership,” as required by section 39-1-102(14.4)(a). 
    Id. at ¶
    41.
    ¶22   We granted the BCC’s and the BAA’s petitions for certiorari review.
    II. Analysis
    ¶23   We begin with the standard of review and applicable principles of statutory
    construction. We then explain the constitutional and statutory contexts in which
    this definitional conundrum surfaces. Finally, we address the three elements of
    residential land—"contiguous parcels,” “used as a unit,” and “common
    ownership”—in Mook, Hogan, and Kelly, respectively.
    A. Standard of Review and Principles of Statutory
    Interpretation
    ¶24   We review de novo issues of statutory interpretation. Boulder Cty. Bd. of
    Comm’rs v. HealthSouth Corp., 
    246 P.3d 948
    , 951 (Colo. 2011). When interpreting a
    statute, “[o]ur primary objective is to effectuate the intent of the General Assembly
    by looking to the plain meaning of the language used, considered within the
    context of the statute as a whole.” Bly v. Story, 
    241 P.3d 529
    , 533 (Colo. 2010). In
    the absence of a statutory definition, “we construe a statutory term in accordance
    with its ordinary or natural meaning.” Cowen v. People, 
    2018 CO 96
    , ¶ 14, 
    431 P.3d 215
    , 218 (quoting FDIC v. Meyer, 
    510 U.S. 471
    , 476 (1994)). “In applying the plain
    13
    meaning of statutory language, we must ‘give consistent effect to all parts of [the]
    statute, and construe each provision in harmony with the overall statutory
    design.’” 
    Id. at ¶
    13, 431 P.3d at 218 
    (alteration to original) (quoting Larrieu v. Best
    Buy Stores, L.P., 
    2013 CO 38
    , ¶ 12, 
    303 P.3d 558
    , 561). Further, “[w]e must adopt a
    construction that avoids or resolves potential conflicts, giving effect to all
    legislative acts, if possible.” People v. Stellabotte, 
    2018 CO 66
    , ¶ 32, 
    421 P.3d 174
    ,
    180.
    B. The Gallagher Amendment
    ¶25    Before 1982, Colorado used a uniform taxation system. The tax authority
    assessed “each of the various classes of real and personal property” at an equal
    rate. Colo. Const. art. X, § 3(1)(a) (amended 1982). But in 1982, Colorado voters
    approved the Gallagher Amendment, which set the assessment rate for residential
    real property3 at twenty-one percent but fixed the assessment rate for “all other
    taxable property” at twenty-nine percent. Colo. Const. art. X, § 3(1)(b).
    ¶26    Further, the Gallagher Amendment requires the legislature to annually
    adjust the tax rate for residential real property. 
    Id. This ensures
    that the amount
    of state taxes derived from residential real property assessment remains constant.
    3 “Residential real property . . . shall include all residential dwelling units and the
    land, as defined by law, on which such units are located . . . .” Colo. Const. art. X,
    § 3(1)(b).
    14
    
    Id. Because of
    this requirement, the General Assembly has continually lowered
    the assessment rate for residential real property. See § 39-1-104.2, C.R.S. (2019).
    ¶27   During the years relevant to these three appeals (2013–2015), the assessment
    rate for residential real property was 7.96 percent. 
    Id. at §
    -104.2(n)–(o). In contrast,
    the tax rate for vacant land remained at twenty-nine percent. § 39-1-104(1), C.R.S.
    (2019).   Thus, to receive a preferential tax rate for their subject parcels, the
    landowners here sought to prove that their properties qualify as residential land
    under section 39-1-102(14.4)(a).
    ¶28   To qualify as residential land, property must contain a residence. See Colo.
    Const. art. X, § 3(1)(b) (defining “residential real property” to “include all
    residential dwelling units and the land, as defined by law, on which such units are
    located” (emphasis added)).         However, section 39-1-102(14.4)(a) expressly
    contemplates the classification of multiple parcels as residential land. In those
    situations, each parcel need not contain an independent residential dwelling unit.
    However, any undeveloped parcels must be: (1) contiguous with residential land;
    (2) used as a unit with residential land; and (3) under common ownership with
    residential land.   See § 39-1-102(14.4)(a).    We address one of these statutory
    requirements in each case we decide today.
    15
    C. Mook: “Contiguous Parcels”
    ¶29   The parties dispute what it means for parcels to be “contiguous.” The
    Mooks claim that parcels need not touch one another. The BCC asserts the
    opposite. We agree with the BCC that the parcels must physically touch to be
    contiguous.
    1. Under the Plain Language of Section 39-1-102(14.4)(a),
    “Contiguous Parcels” Must Physically Touch
    ¶30   Section 39-1-102(14.4)(a) defines “residential land” to include “contiguous
    parcels of land.” But the statute doesn’t define “contiguous.” In the absence of a
    statutory definition, “we may consider a definition in a recognized dictionary.”
    Cowen, ¶ 
    14, 431 P.3d at 218
    –19.
    ¶31   Dictionaries define the term “contiguous” to mean “[t]ouching at a point or
    along a boundary; adjoining.” Contiguous, Black’s Law Dictionary (11th ed. 2019)
    (“Texas and Oklahoma are contiguous.”); Contiguous, New Oxford American
    Dictionary (3d ed. 2010) (“sharing a common border; touching; the 48 contiguous
    states”). Therefore, “contiguous parcels of land” are those that physically touch.
    ¶32   This construction finds further support in the tax code, the ARL, and court
    of appeals caselaw. For example, section 39-27-101(19), C.R.S. (2019), defines a
    “Part 121 air carrier” to mean “an aircraft operator that conducts operations . . .
    between any two points within the forty-eight contiguous states of the United
    States.” (Emphasis added.) That statutory language mirrors the definitions and
    16
    examples provided in the dictionaries cited above. In reference to an assessor’s
    duty to prepare and maintain county maps, the ARL defines “contiguous parcels”
    as “adjoining parcels, under a common ownership and within the same tax area.”
    2 Div. of Prop. Taxation, Dep’t of Local Affairs, Administrative and Assessment
    Procedures 14.2 (rev. Oct. 2019) [hereinafter ARL] (emphasis added); see Merriam-
    Webster Dictionary, https://www.merriam-webster.com/dictionary/adjoining;
    [https://perma.cc/9MZ8-9NEJ] (defining adjoining as “touching or bounding at
    a point or line”). And two unanimous divisions of the court of appeals have
    likewise concluded that “contiguous,” as it’s used in section 39-1-102(14.4)(a),
    refers to parcels of land that physically touch. Bringle Family Tr. v. Bd. of Cty.
    Comm’rs, 
    2018 COA 64
    , ¶ 17, __ P.3d __ (“Thus, we conclude that subsection
    102(14.4)(a)’s language unambiguously means that two parcels must actually
    touch to be contiguous and, thereby, to constitute residential property.”); Mook,
    ¶ 13 (“Hence, for two parcels to be contiguous under section 39-1-102(14.4)(a), the
    boundaries of the two parcels must touch at some point.”).
    ¶33   In support of their argument that we should interpret “contiguous” more
    broadly, the Mooks cite several Colorado statutes that define contiguous land to
    include areas that don’t physically touch.
    • Section 31-12-104(1)(a), C.R.S. (2019), addresses municipal annexation
    and requires contiguity between the annexing municipality and the to-
    be-annexed property. However, the statute clarifies that “[c]ontiguity
    17
    shall not be affected by” platted streets or alleys, public or private rights-
    of-way, public or private transportation rights-of-way, public lands, or
    “natural or artificial waterway[s].” 
    Id. • Section
    31-12-702, C.R.S. (2019), allows landowners to petition to de-
    annex “contiguous tracts” of agricultural or farm land from a town, but
    it states that “[i]ntersecting highways or intervening railroads” won’t
    defeat contiguity.
    • Section 9-5-101(6), C.R.S. (2019), which defines the term “project” as it’s
    used in the standards for accessible housing, states that contiguity isn’t
    defeated “by a property line or by a public or private road.”
    • And section 30-28-302(5), C.R.S. (2019), states that, in a subdivision
    exemption plat, a “‘[p]arcel’ means a contiguous area of land, except for
    intervening easements and rights-of-way . . . .”
    Although these statutes address topics distinct from property taxation, the Mooks
    assert that these sources establish that parcels remain “contiguous” even if
    physically separated by intrusions like roads or rights-of-way.
    ¶34      But these statutes hurt, rather than help, the Mooks’ argument. If the
    legislature believed the term “contiguous” referred to both touching and non-
    touching parcels, there would have been no need for it to clarify in these statutes
    that contiguity isn’t defeated by physical separation.
    ¶35      The legislature could have used similar language to qualify “contiguous” in
    section 39-1-102(14.4)(a). But it didn’t. And “[j]ust as important as what the statute
    says is what the statute does not say.” Auman v. People, 
    109 P.3d 647
    , 656 (Colo.
    2005).     Thus, we construe the legislature’s decision to omit such qualifying
    language from section 39-1-102(14.4)(a) as intentional, see 
    id. at 657,
    and, of course,
    18
    we must refrain from adding words to the statute, see People v. Diaz, 
    2015 CO 28
    ,
    ¶ 12, 
    347 P.3d 621
    , 624.
    ¶36   Further, were we to construe “contiguous” to encompass both touching and
    non-touching parcels of land, we arguably would render superfluous the language
    in those other statutes clarifying that certain physically separated parcels remain
    contiguous. We seek to avoid constructions that would render statutory language
    superfluous.   Pineda-Liberato v. People, 
    2017 CO 95
    , ¶ 39, 
    403 P.3d 160
    , 166.
    Therefore, we decline to construe contiguous so broadly. Instead, we conclude
    that the plain language of section 39-1-102(14.4)(a) requires that parcels must
    physically touch to be contiguous.
    ¶37   Despite the seeming clarity of the plain language, the Mooks encourage us
    to look further in gleaning legislative intent. They raise several arguments in
    support of their contention that this court should construe the phrase “contiguous
    parcels” to encompass vacant parcels that don’t physically touch the homeowner’s
    existing residential parcel. We address those arguments below.
    2. The Mooks’ Remaining Arguments
    ¶38   First, the Mooks provide alternate definitions of “contiguous” from
    dictionaries in circulation when the General Assembly adopted section
    39-1-102(14.4)(a) in 1983.    Those dictionaries defined contiguous to mean
    “touching at a point or along a boundary” or “[i]n close proximity.”           See
    19
    Contiguous, Black’s Law Dictionary (5th ed. 1979). The Mooks urge this court to
    credit those definitions as more representative of the legislature’s intent when it
    passed section 39-1-102(14.4)(a). And the Mooks assert that these dictionaries at
    the very least render the phrase “contiguous parcels” susceptible to more than one
    reasonable interpretation and thus ambiguous. See Cowen, ¶ 
    12, 431 P.3d at 218
    .
    ¶39   However, “[m]ost words have multiple definitions; the inquiry must focus
    on the manner and context in which they are used.” Burns v. McGraw-Hill Broad.
    Co., 
    659 P.2d 1351
    , 1357 n.2 (Colo. 1983). After examining the manner and context
    of the language in section 39-1-102(14.4)(a), in conjunction with other statutes that
    explicitly clarify when contiguity isn’t defeated by physical separation, we
    conclude the General Assembly intended the phrase “contiguous parcels” to only
    encompass those parcels that physically touch. Thus, we decline to find the statute
    ambiguous.
    ¶40   Second, the Mooks contend that this court’s decision in Douglas County Board
    of Equalization v. Clarke, 
    921 P.2d 717
    (Colo. 1996), indicates that contiguous land
    can include non-touching parcels. In Clarke, we considered the definition of
    “agricultural land” in section 39-1-102(1.6)(a)(I), C.R.S. (1994). 
    Clarke, 921 P.2d at 720
    –21. That statute defined agricultural land, in part, as “[a] parcel of land . . .
    used as a farm or ranch.” 
    Id. at 720.
    In construing the statutory term “parcel,” we
    concluded that “a parcel is generally defined as a contiguous body of land.” 
    Id. at 20
    722 (emphasis added). We elaborated that “contiguity need not be absolute, and
    may exist irrespective of intervening roads, easements or natural intrusions.” 
    Id. at 722
    n.9. The Mooks contend that, although not binding, that language is
    persuasive and indicates that “contiguity of land is not an absolute concept, and
    [it] may exist despite intervening roads and easements.”
    ¶41   But Clarke is inapposite. Clarke involved a different property classification—
    namely agricultural land, not residential land.          And the agricultural land
    subsection at issue in Clarke didn’t explicitly require contiguity between various
    parcels.    See 
    id. at 720–21.
      We simply used the term contiguous to define
    “parcel”—the actual statutory term at issue. 
    Id. at 722
    . Because the legislature
    intended “contiguous”—as it’s used in the residential land subsection—to require
    that parcels physically touch, the Mooks’ reliance on Clarke is misplaced.
    ¶42   The     Mooks    also   cite   out-of-state   authority,   which   they   assert:
    (1) demonstrates how other jurisdictions have construed the term “contiguous” to
    include non-touching parcels; or, alternately, (2) highlights how some courts have
    interpreted contiguous to require physical touching while others haven’t, thereby
    rendering the term ambiguous. We are unpersuaded: Even if the definition of
    contiguous may be up for grabs in other states, our legislature, for the reasons
    stated, made its intention plain here.
    21
    ¶43   Finally, the Mooks assert that we should adopt a broad definition of
    contiguous to reduce the relative tax burden on residential property owners. See,
    e.g., Vail Assocs., Inc. v. Bd. of Assessment Appeals, 
    765 P.2d 593
    , 594–95 (Colo. App.
    1988) (“Legislative hearings and particularly the final conference committee
    report demonstrates that the legislative intent was to grant homeowners a
    modicum of tax relief.”). Moreover, they contend that any ambiguity should be
    resolved in favor of the taxpayer.       Because we base our holding in section
    39-1-102(14.4)(a)’s plain language, we need not rely on such extrinsic
    considerations to determine the meaning of contiguous. We therefore respectfully
    reject these remaining arguments.
    3. The Residential Parcel and the Subject Parcel Aren’t
    “Contiguous Parcels of Land”
    ¶44   The subject parcel and the residential parcel don’t physically touch. They’re
    completely separated by a strip of land owned by the HOA. Thus, these parcels
    don’t qualify as “contiguous parcels of land” and can’t satisfy the “residential
    land” definition in section 39-1-102(14.4)(a).
    D. Hogan: “Used as a Unit”
    ¶45   Disagreement abounds regarding what property use satisfies the “used as a
    unit” requirement.     Several divisions of the court of appeals have come to
    conflicting conclusions when construing this element of the residential land
    definition. See Martin Tr. v. Bd. of Cty. Comm’rs, 
    2019 COA 18
    , __ P.3d __; Twilight
    22
    Ridge, LLC v. Bd. of Cty. Comm’rs, 
    2018 COA 108
    , __ P.3d __; Hogan, 
    2018 COA 86
    ;
    Rust v. Bd. of Cty. Comm’rs, 
    2018 COA 72
    , __ P.3d __; Fifield v. Pitkin Cty. Bd. of
    Comm’rs, 
    2012 COA 197
    , 
    292 P.3d 1207
    . In reviewing these uniformly thoughtful
    and thorough opinions, we largely adopt the analysis employed by the Hogan
    division and by Judge Hawthorne in his dissent in Martin Trust. In doing so, we
    conclude that a landowner must use multiple parcels of land together as a
    collective unit of residential property to satisfy the “used as a unit” requirement.
    1. The Assessor Applied Incorrect Legal Standards to
    Deny the Hogans’ Petition to Reclassify the Subject
    Parcel
    ¶46   In denying the Hogans’ petition for reclassification, the county assessor:
    (1) concluded that none of the Hogans’ uses of the subject parcel satisfy the “used
    as a unit” requirement according to the ARL guidelines; (2) construed the
    “residential land” definition to require that the Hogans engage in more “active”
    uses of the property; and (3) testified that the subject parcel must contain a
    residential improvement to be classified as residential land, which the subject
    parcel does not. The BAA upheld the BCC’s application of the residential land
    definition in section 39-1-102(14.4)(a) and affirmed the assessor’s decision.
    ¶47   We defer to the Property Tax Administrator’s and the BAA’s construction
    of section 39-1-102(14.4)(a) if that statute “is subject to different reasonable
    interpretations and the issue[s] come[] within [their] special expertise.”
    23
    
    Huddleston, 913 P.2d at 17
    . For the reasons stated below, we agree with the court
    of appeals that no such deference is warranted as to the three actions described
    above. On the contrary, none of those requirements correspond to the plain
    language of section 39-1-102(14.4)(a). Thus, the assessor erred by relying on them
    to classify the Hogans’ subject parcel, and the BAA erred in upholding the
    assessor’s application of the statute.
    a. The ARL Guidelines
    ¶48    The ARL provides assessors with the following guidelines to consider when
    deciding whether property qualifies as “residential land” under section
    39-1-102(14.4)(a):
    • Are the contiguous parcels under common ownership?
    • Are the parcels considered an integral part of the residence and
    actually used as a common unit with the residence?
    • Would the parcel(s) in question likely be conveyed with the
    residence as a unit?
    • Is the primary purpose of the parcel and associated structures to
    be for the support, enjoyment, or other non-commercial activity
    of the occupant of the residence?
    
    ARL, supra, at 6
    .11–.12. The ARL further states that “[i]f answers to all of these
    criteria are yes, then it is likely that the parcel would fall under the residential
    classification.” 
    Id. at 6.12.
    24
    ¶49   The assessor relied on the second (integral) and third (conveyed as a unit)
    ARL guidelines to determine whether the Hogans satisfied the “used as a unit”
    statutory requirement.
    i. Integral
    ¶50   The assessor interpreted the second guideline—“[a]re the parcels
    considered an integral part of the residence and actually used as a common unit
    with the residence?”—to mean the subject parcel must be “necessary” or
    “essential” to the Hogans’ use of the residential and reclassified parcels. And the
    BAA found that the assessor correctly applied the ARL guidelines to deny the
    Hogans’ petition for reclassification.
    ¶51   But, as the division below noted, this construction has no basis in the
    statutory language. The statute requires that contiguous parcels of land be “used
    as a unit.” “Used” means “employed in accomplishing something.” Merriam-
    Webster     Dictionary,     https://www.merriam-webster.com/dictionary/used;
    [https://perma.cc/TST4-WKK5]. A “unit” refers to “a single thing, person, or
    group that is a constituent of a whole.”               Merriam-Webster Dictionary,
    https://www.merriam-webster.com/dictionary/unit;
    [https://perma.cc/2MDU-7E4D]. Thus, these definitions suggest the Hogans
    must employ the subject property as a constituent part of a larger whole. In other
    25
    words, the Hogans should treat all three parcels—the residential, reclassified, and
    subject parcels—as a single residential unit and use it accordingly.
    ¶52   Integral means “formed as a unit with another part” and “composed of
    constituent parts.”     Merriam-Webster Dictionary, https://www.merriam-
    webster.com/dictionary/integral;     [https://perma.cc/MSG9-ZZV7].          Those
    definitions align with the foregoing definitions of “used” and “unit.” However,
    the terms “necessary” and “essential” connote more than mere unity. Necessary
    is defined as “absolutely needed,” while essential means “of the utmost
    importance.”          Merriam-Webster        Dictionary,   https://www.merriam-
    webster.com/dictionary/necessary; [https://perma.cc/5LKP-CD7A]; Merriam-
    Webster Dictionary, https://www.merriam-webster.com/dictionary/essential;
    [https://perma.cc/49WJ-QX85]. These terms do not track the statutory language,
    and using them significantly narrows the plain meaning of “used as a unit.”
    Therefore, we disapprove of the assessor’s decision to engraft them here. See
    HealthSouth 
    Corp., 246 P.3d at 951
    (“We do not add words to a statute.”). We agree
    with the court of appeals that the assessor and the BAA erred to the extent that
    they rejected the Hogans’ uses of the subject parcel for the reason that they were
    unnecessary or inessential to the Hogans’ use of the residential parcel.
    26
    ii. Conveyed as a Unit
    ¶53   Applying the third ARL guideline—“[w]ould the parcel[] in question likely
    be conveyed with the residence as a unit?”—the assessor concluded that the
    Hogans were likely to sell the subject parcel separately from the residential and
    reclassified parcels. She noted that the Hogans’ deck extends from their house on
    the residential parcel onto the reclassified parcel. So, “[i]t was logical . . . [the
    residential and reclassified parcels] would be conveyed together.” In contrast, the
    assessor pointed out how Mr. Hogan purchased the subject parcel separately, “at
    a very favorable price. And due to appreciation in Summit, it’s more than likely
    that Mr. Hogan may sell this separately.” The assessor noted that this factor
    weighed against classifying the subject parcel as residential land.
    ¶54   But section 39-1-102(14.4)(a) defines residential land as property that “is used
    as a unit.” (Emphasis added.) And we previously construed identical language
    in the tax code to refer only to an owner’s present use of property. See Boulder Cty.
    Bd. of Equalization v. M.D.C. Constr. Co., 
    830 P.2d 975
    , 980–81 (Colo. 1992)
    (addressing the definition of agricultural land). In M.D.C. Construction, we noted
    that a parcel qualifies as a “farm” when the land “is used to produce agricultural
    products . . . ,” and a parcel qualifies as a “ranch” when the land “is used for grazing
    livestock . . . .” 
    Id. at 981.
    We concluded that this plain language directs assessors
    27
    to consider only an owner’s present use of land for classification purposes,
    “without regard to any future intent on the part of the owner.” 
    Id. at 980–81.
    ¶55   Here too, the legislature’s use of the present tense—“is used”—in section
    39-1-102(14.4)(a) directs assessors to classify property as residential land according
    to how the owner presently uses the land. The ARL guidelines erroneously focus
    on the owner’s future plans with respect to the subject property. Therefore, the
    court of appeals correctly concluded that the assessor and the BAA erred by
    relying on such guidance to classify the Hogans’ subject parcel.
    b. “Active” Use
    ¶56   In addition to relying on the ARL guidelines to support her classification,
    the assessor stated that the county typically looks for “active” property uses,
    which she described as involving the construction of “some type of structure,” like
    “fire pits and . . . outdoor living areas . . . where there’s some investment in the
    property to make it an outdoor area.” Because the Hogans hadn’t made any
    structural improvements to the property, the assessor concluded that their
    “passive” uses were insufficient to satisfy the “used as a unit” requirement.
    ¶57   But, as previously noted, “used” simply means “employed in accomplishing
    something.”          Merriam-Webster          Dictionary,   https://www.merriam-
    webster.com/dictionary/used; [https://perma.cc/TST4-WKK5].              The Hogans
    could employ the subject parcel in accomplishing something, such as walking their
    28
    dog or viewing nature, without engaging in those “active” uses described by the
    assessor. Thus, the statute’s plain language doesn’t so limit the permissible uses
    of residential land. The court of appeals properly concluded that the assessor
    erred by relying on this “active” use requirement to deny the Hogans’ petition and
    that it was error for the BAA to uphold such an application of section
    39-1-102(14.4)(a).
    c. Residential Improvements
    ¶58   Finally, the assessor interpreted section 39-1-102(14.4)(a) to require that the
    subject parcel contain a residential improvement.4 Because the subject parcel
    didn’t contain a residential improvement, the assessor concluded that she couldn’t
    reclassify it as residential land.
    ¶59   However, the plain language of section 39-1-102(14.4)(a) doesn’t require
    each parcel of land in a multi-parcel assemblage to contain a residential
    improvement.      The statute expressly contemplates the classification of both
    single-parcel and multi-parcel properties. Parsing the statutory language so that
    4 The tax code defines “residential improvements” to include “a building, or that
    portion of a building, designed for use predominantly as a place of residency by a
    person, a family, or families. The term includes buildings, structures, fixtures,
    fences, amenities, and water rights that are an integral part of the residential use.”
    § 39-1-102(14.3).
    29
    it only addresses single-parcel properties, the statute reads: “‘Residential land’
    means a parcel . . . of land . . . upon which residential improvements are located
    and that is used as a unit in conjunction with the residential improvements located
    thereon.” § 39-1-102(14.4)(a). In the multi-parcel context, section 39-1-102(14.4)(a)
    defines “residential land” as “contiguous parcels of land under common
    ownership upon which residential improvements are located and that is used as a
    unit in conjunction with the residential improvements located thereon.”
    ¶60   In stating the “used as a unit” requirement, the legislature refers to the
    “contiguous parcels of land under common ownership” as a collective group that
    must together (not individually, parcel-by-parcel) satisfy that element.          
    Id. Notably, the
    legislature used the singular verb “is” in both the single parcel and
    multi-parcel definitions. This indicates that, like a single parcel of land, a multi-
    parcel assemblage should be treated as a singular unit of property when applying
    section 39-1-102(14.4)(a). And the last part of the definition requires a landowner
    to use multiple parcels “as a unit in conjunction with the residential improvements
    located thereon.” 
    Id. (emphases added).
    The term “thereon” refers to the multi-
    parcel “unit.” Thus, the statute only requires that landowners use the collective
    unit of property (composed of multiple, individual parcels) together with the
    residential improvements located on that collective unit. Nothing in the statute
    mandates that these residential improvements exist on each parcel.
    30
    ¶61   If the legislature intended to require that each parcel contain a residential
    improvement, it could have said as much.              It didn’t.   Instead, section
    39-1-102(14.4)(a) only refers to residential improvements as they exist on a greater,
    multi-parcel piece of property. Thus, we agree with the court of appeals that
    section 39-1-102(14.4)(a) doesn’t require each parcel to contain a residential
    improvement.
    ¶62   Here, the Hogans’ house qualifies as a residential improvement under
    section 39-1-102(14.3), thereby satisfying this requirement as it applies to the
    Hogans’ three-parcel assemblage of land. Thus, the assessor erred by denying the
    Hogans’ petition for reclassification because the subject parcel doesn’t also contain
    a residential improvement.
    2. The Correct Legal Standard for Determining Whether
    Property Use Satisfies the “Used as a Unit” Requirement
    ¶63   Thus far, we’ve rejected the legal standards the assessor and the BAA
    applied to determine whether the Hogans’ use of the subject parcel satisfied the
    “used as a unit” requirement. However, as evidenced by the multitude of cases
    pending around the state, assessors need more guidance on how to construe and
    apply this element of the residential land definition.       Therefore, we supply
    additional direction below.
    ¶64   As a reminder, section 39-1-102(14.4)(a) defines “residential land” to mean
    “a parcel or contiguous parcels of land under common ownership upon which
    31
    residential improvements are located and that is used as a unit in conjunction with
    the residential improvements located thereon.”
    ¶65   From that plain language, two principles emerge as essential to defining the
    “used as a unit” requirement. First, the Hogans must use their three parcels of
    land (the residential, reclassified, and subject parcels; the “contiguous parcels of
    land under common ownership”) as a “unit,” i.e., as though they’re a greater,
    single parcel of land. Second, the Hogans should use that collective piece of
    property “in conjunction with the residential improvements located thereon,” i.e.
    their house. § 39-1-102(14.4)(a).
    ¶66   Yet the parties disagree regarding what type of use landowners must
    engage in to prove they use any undeveloped parcels of land in conjunction with
    residential improvements located on different parcels. Because the Hogans seek
    to reclassify the subject parcel under the multi-parcel definition of residential land,
    the BAA and the BCC would have us require the Hogans to engage in some
    heightened use of the subject parcel (beyond mere dog-walking, nature-watching,
    and privacy-maintaining) to prove that it’s actually “used as a unit” with the
    residential improvements located on the Hogans’ residential and reclassified
    parcels.
    ¶67   But the Hogans argue that we shouldn’t construe the statute to impose
    different use requirements for single parcels of land and multi-parcel assemblages
    32
    of land. Instead, the Hogans contend that their use of the subject parcel satisfies
    the “used as a unit” requirement because their multi-parcel assemblage contains a
    dwelling and they don’t use the subject parcel for any non-residential purpose.
    ¶68   We agree with the Hogans. First, the statute’s plain language provides no
    basis for imposing a heightened use requirement on landowners seeking to
    reclassify property as residential land by satisfying the multi-parcel definition. In
    regard to both single-parcel properties and multi-parcel properties, the statute
    simply states that a landowner must use the property as a unit in conjunction with
    the residential improvements located thereon. There’s no textual distinction
    between how this requirement applies in the single-parcel context versus the
    multi-parcel context.
    ¶69   Second, the Hogans are correct that, to obtain a residential land
    classification, landowners must refrain from engaging in non-residential property
    uses. The last sentence of section 39-1-102(14.4)(a) provides that “[t]he term
    [residential land] does not include any portion of the land that is used for any
    purpose that would cause the land to be otherwise classified . . . .” Together the
    tax code and the ARL provide assessors with use-based definitions that
    33
    correspond     to   the   various   property   classes. 5   For   example,    section
    39-1-102(1.6)(a)(I)(A) defines agricultural land as “[a] parcel of land . . . that was
    used the previous two years and presently is used as a farm or ranch.” (Emphases
    added.) Additionally, the ARL states that “[c]ommercial property includes all
    lands, improvements, and personal property used as a commercial enterprise.”
    
    ARL, supra, at 6
    .28 (emphasis added). So, if a landowner’s property use satisfies
    one of these other definitions, such use cannot satisfy the “used as a unit”
    requirement.
    ¶70   But however relatively straightforward it might be to distinguish residential
    land from agricultural or commercial land, the cases addressing the “used as a
    unit” requirement demonstrate the inherent difficulty in differentiating vacant
    land from undeveloped residential land. The tax code defines “vacant land” as
    “any lot, parcel, site, or tract of land upon which no buildings or fixtures, other
    than minor structures” and “site improvements” are located. § 39-1-103(14)(c)(I),
    C.R.S. (2019).6 Thus, vacant land is generally undeveloped.
    5 The ARL lists the following property classes for assessors to choose from when
    classifying land: vacant; residential; commercial; industrial; agricultural; natural
    resources; producing mines; oil and gas; state assessed; and exempt. 
    ARL, supra, at 6
    .1.
    6“‘Minor structures’ means improvements that do not add value to the land on
    which they are located and that are not suitable to be used for and are not actually
    34
    ¶71   And because we conclude that each contiguous parcel need not contain a
    residential improvement, there will be times (such as the present) when
    landowners seek to reclassify undeveloped property from vacant land to
    residential based solely on their purported use of that parcel in conjunction with a
    contiguous and commonly owned residential parcel. How, in those situations, are
    assessors to determine whether a landowner’s use of undeveloped property
    qualifies the land for a residential land classification over a vacant land
    classification?
    ¶72   The fourth ARL guideline—“[i]s the primary purpose of the parcel and
    associated structures to be for the support, enjoyment, or other non-commercial
    activity of the occupant of the residence?”—remains instructive here. 
    ARL, supra, at 6
    .12. This guideline doesn’t incorporate requirements that go beyond the text
    of the statute.    Instead, it (1) confirms that landowners should use any
    undeveloped parcels as an extension of their residence, and (2) gives greater
    meaning to what type of property use satisfies the “used as a unit” requirement.
    used for any commercial, residential, or agricultural purpose.”          
    Id. at §
    -103(14)(c)(II)(A). “‘Site improvements’ means streets with curbs and gutters,
    culverts and other sewage and drainage facilities, and utility easements and
    hookups for individual lots or parcels.” 
    Id. at §
    -103(14)(c)(II)(B).
    35
    Further, it provides appropriate limiting language, noting that those qualifying
    uses should be the “primary purpose of the parcel.” 
    Id. ¶73 Previous
    decisions by the court of appeals support a similar understanding
    of the type of use that satisfies the “used as a unit” requirement. In Gyurman v.
    Weld County Board of Equalization, 
    851 P.2d 307
    , 308 (Colo. App. 1993), the county
    classified part of a landowner’s property as residential land and part as vacant
    land. The landowner appealed this mixed-use classification to the BAA, which
    reclassified all of the landowner’s property as residential land. 
    Id. at 308–09.
    Notably, like the Hogans, the landowner testified that he used his land to “look[]
    at the wildlife that was out there and [to] keep[] people off of it.” 
    Id. at 308.
    The
    county asserted that this use didn’t prove that the landowner used his entire land
    as a unit in conjunction with his residence. See 
    id. at 308–09.
    However the BAA
    determined that such use did qualify the landowner’s property for residential
    classification.   
    Id. at 309.
      And a division of the court of appeals affirmed,
    concluding that the landowner’s evidence provided “ample support” for the
    BAA’s determination that the landowner’s property uses satisfied the “used as a
    unit” requirement for the entirety of his property. 
    Id. at 309–10.
    ¶74    True, Gyurman addresses how the “used as a unit” requirement operates in
    the single-parcel context. But, as we’ve already noted, there’s nothing in section
    39-1-102(14.4)(a) to indicate that the “used as a unit” requirement applies
    36
    differently when a landowner seeks to reclassify a single parcel of land versus a
    multi-parcel assemblage of land. Thus, Gyurman demonstrates how property uses
    such as those contemplated by the fourth ARL guideline and testified to by the
    Hogans are sufficient to satisfy the “used as a unit” requirement.
    ¶75   Finally, section 39-1-102(14.4)(a) provides the “residential land” definition
    that assessors must rely on to classify property. In contrast, the legislature defined
    “vacant land” in section 39-1-103(14) to assist assessors “in determining the actual
    value of vacant land.” § 39-1-103(14)(a) (emphasis added). And it expressly limited
    the application of that definition, noting that it is only “[f]or the purposes of this
    subsection 14.”    
    Id. at §
    -103(14)(c)(I) (emphasis added).         When statutes
    irreconcilably conflict, “we have adopted a canon of statutory construction that a
    specific statutory provision ‘acts as an exception to that general provision, carving
    out a special niche from the general rules to accommodate a specific
    circumstance.’” Stellabotte, ¶ 
    32, 421 P.3d at 180
    (quoting Martin v. People, 
    27 P.3d 846
    , 852 (Colo. 2001)).
    ¶76   Whether the Hogans’ subject parcel satisfies the “used as a unit”
    requirement is an issue of classification, not valuation. And, the residential land
    definition addresses the specific circumstances present here.        That definition
    expressly permits the reclassification of undeveloped property if the parcel is
    contiguous to residential land, commonly owned with residential land, and used
    37
    as a unit with residential land. And the Hogans seek to reclassify not just any
    undeveloped parcel but one that is contiguous to, and under common ownership
    with, their residential land and which they purportedly use in conjunction with
    their home. Thus, to the extent the residential land definition irreconcilably
    conflicts with the vacant land definition, we elect to apply the residential land
    definition here.
    ¶77   The plain language of section 39-1-102(14.4)(a), the ARL, and relevant court
    of appeals caselaw indicate that, to satisfy the “used as a unit” requirement, a
    landowner must use multiple parcels of land together as a collective unit of
    residential property. This is the standard the BAA should apply on remand to
    determine whether the Hogans’ use of the subject parcel satisfies the “used as a
    unit” requirement of section 39-1-102(14.4)(a).
    E. Kelly: “Common Ownership”
    ¶78   Based on the plain language of the tax code, county records establish
    property ownership and thus indicate whether parcels are held under “common
    ownership.”
    1. Under the Plain Language of the Tax Code, Property
    Ownership is Determined According to Record Title
    ¶79   Ms. Kelly asserts that “common ownership” is best understood as a distinct
    phrase, so this court shouldn’t construe that phrase by separating it into its
    constituent words—“common” and “ownership.” She thus urges this court to
    38
    look past the statutory language and instead interpret “common ownership” to
    encompass “overlapping equity ownership and control.”
    ¶80   However, section 39-5-102(1), C.R.S. (2019), directs that “[o]wnership of real
    property shall be ascertained by the assessor from the records of the county clerk
    and recorder . . . .” (Emphasis added.) “There is a presumption that the word
    ‘shall’ when used in a statute is mandatory.” Riley v. People, 
    104 P.3d 218
    , 221
    (Colo. 2004). Thus, according to the plain language of the tax code, assessors must
    rely on county records to determine whether properties are held under “common
    ownership.”
    ¶81   We came to the same conclusion in Hinsdale, when we held that assessors
    should consult county records to determine property ownership when assessing
    taxes. ¶ 
    22, 438 P.3d at 747
    . We based our decision on section 39-5-102(1), noting
    that “property tax valuation and assessment in Colorado is premised on the notion
    that the party holding record title to the property is the fee owner responsible for
    property taxes.” 
    Id. at ¶
    ¶ 22, 
    25, 438 P.3d at 747
    , 748 (emphasis added). Hinsdale
    therefore rejected the court of appeals’ use of a substance-over-form analysis that
    would’ve allowed individuals to overcome record title by presenting evidence that
    a non-record owner “enjoy[ed] most of the traditional benefits of real property
    ownership,” thus becoming the “true owner” for purposes of tax assessment. See
    
    id. at ¶¶
    14–15, 
    40, 438 P.3d at 746
    , 751.
    39
    ¶82   Ms. Kelly asserts that Hinsdale addressed a sufficiently distinct issue—
    determining ownership for tax assessment, not tax classification—such that we need
    not align our decision in this case with Hinsdale. She argues that assessors can
    “utilize record title to determine ‘ownership’ for purposes of tax liability as
    required by [Hinsdale], while simultaneously considering unrecorded instruments
    to determine ‘common ownership’ under section -102(14.4)(a).”
    ¶83   However, nothing in the plain language of section 39-5-102(1) limits its
    application to property tax assessment or indicates that other sources of ownership
    should control in property tax classification cases. Therefore, we won’t require
    assessors to use different standards when classifying property and assessing taxes.
    ¶84   Further, in Hinsdale we noted several policy considerations that weighed in
    favor of using county records to determine property ownership. ¶ 
    46, 438 P.3d at 752
    . Upon reviewing the Hinsdale division’s decision, we stated that the rebuttable
    presumption analysis “could have unintended consequences”; for example, it
    “could significantly burden county assessors, who often have limited resources.”
    
    Id. And the
    Kelly division’s analysis fosters those exact concerns. Kelly would
    leave individuals free to rebut an assessor’s “common ownership” determination
    by raising conflicting evidence of ownership not reflected in the county records.
    Assessors would then have to wade through this evidence to determine whether
    40
    the individual established common ownership despite not holding record title.
    We again decline to burden assessors with this task.
    ¶85   We recognize that Ms. Kelly isn’t urging this court to affirm the court of
    appeals by relying on the division’s analysis. However, her suggested alternative
    approach is even more problematic than the rebuttable presumption framework
    adopted by the court of appeals. The Kelly division at least would have allowed
    assessors to initially rely on county records to determine ownership. Yet Ms. Kelly
    argues that assessors should consider unrecorded evidence of equity ownership
    and control during the initial classification stage. Ms. Kelly’s approach would thus
    place an even greater burden on assessors. Therefore, we reject such a framework
    for determining ownership under section 39-1-102(14.4)(a). Instead, we direct
    assessors to rely on county records when deciding whether properties are held
    under “common ownership.”
    2. The Residential Parcel and the Subject Parcel Aren’t
    Held “Under Common Ownership”
    ¶86   The parties don’t dispute that, according to the county records, a different
    trust owns each of the two parcels. Thus, those two parcels aren’t held under
    41
    common ownership as required by section 39-1-102(14.4)(a), and the subject parcel
    can’t qualify as residential land.7
    III. Conclusion
    ¶87   We affirm the court of appeals’ judgment in Mook. We affirm the court of
    appeals’ judgment in Hogan and, on remand, direct the BAA to apply the legal
    standards we articulate today to determine whether the Hogans’ use of the subject
    parcel satisfies the “used as a unit” requirement of section 39-1-102(14.4)(a). We
    reverse the court of appeals’ judgment in Kelly.
    7 Ms. Kelly asserts that we should define “common ownership” to encompass
    overlapping ownership interests. The BCC and the BAA favor a narrower
    construction, which would require that identical parties hold record title to each
    contiguous parcel. Because distinct trusts own each parcel, the outcome of this
    case remains the same no matter how we define “common.” Therefore, we decline
    to decide whether “common ownership” refers to identical ownership or merely
    overlapping ownership.
    42