APPLICABILITY
Tucson Unified Development Code § 7.6.2
in effect7.6.2. APPLICABILITY
The provisions of this section apply to the following:
A. All new development
Development
Any human alteration to the state of land, including its vegetation, soil, geology, or hydrology, for any residential, commercial, industrial, utility, or other use, such as, but not limited to, clearing, grubbing, or grading of land, and structural improvements, e.g., buildings, walls, fences, signs, and vehicular use areas.
; and,
B. Expansion of existing development
Development
Any human alteration to the state of land, including its vegetation, soil, geology, or hydrology, for any residential, commercial, industrial, utility, or other use, such as, but not limited to, clearing, grubbing, or grading of land, and structural improvements, e.g., buildings, walls, fences, signs, and vehicular use areas.
, as provided below:
1. Buildings
Building
A structure having a roof supported by columns, posts, or walls and intended for the shelter, housing, or enclosure of any person, entity, animal, process, equipment, goods, or materials of any kind or nature.
Greater Than 10,000 Square Feet
On sites
Site
The land area consisting of a portion of a lot, an entire lot, or contiguous lots, not including dedicated public property, designated for development as a single entity.
where the gross floor area
Gross Floor Area
The sum of the horizontal areas of all floors of all buildings, including accessory buildings on a lot, measured from the exterior faces of the exterior walls or from the centerline of walls separating two buildings and includes elevator shafts and the stairwells at each story. Gross floor area includes floor space with structural headroom of six feet and six inches or more used for mechanical equipment; penthouses; attic space; interior balconies; mezzanines; and service bays but does not include any interior space used for parking, loading, or loading space that is incidental to the principal use.
of the existing building
Building
A structure having a roof supported by columns, posts, or walls and intended for the shelter, housing, or enclosure of any person, entity, animal, process, equipment, goods, or materials of any kind or nature.
(s) is more than 10,000 square feet, expansion in square footage of land area, floor area
Floor Area
Same as Gross Floor Area.
Gross Floor Area
The sum of the horizontal areas of all floors of all buildings, including accessory buildings on a lot, measured from the exterior faces of the exterior walls or from the centerline of walls separating two buildings and includes elevator shafts and the stairwells at each story. Gross floor area includes floor space with structural headroom of six feet and six inches or more used for mechanical equipment; penthouses; attic space; interior balconies; mezzanines; and service bays but does not include any interior space used for parking, loading, or loading space that is incidental to the principal use.
, lot coverage
Lot Coverage
The area of a lot covered by buildings, storage areas, and vehicular use areas. For specific application standards, refer to Section 6.4.3.
, or vehicular use area
Vehicular Use Area
Any area of a site or structure used for the movement, parking, or standing of motor vehicles. The vehicular use area includes access drives, maneuvering areas, refuse collection locations, loading spaces, and any landscaping and screening within ten feet of these areas.
as follows:
a. If the expansion is less than 25%, the standards of this section apply only to the proposed expansion. Existing development
Development
Any human alteration to the state of land, including its vegetation, soil, geology, or hydrology, for any residential, commercial, industrial, utility, or other use, such as, but not limited to, clearing, grubbing, or grading of land, and structural improvements, e.g., buildings, walls, fences, signs, and vehicular use areas.
on the site
Site
The land area consisting of a portion of a lot, an entire lot, or contiguous lots, not including dedicated public property, designated for development as a single entity.
is subject to the zoning standards in effect at the time the existing development
Development
Any human alteration to the state of land, including its vegetation, soil, geology, or hydrology, for any residential, commercial, industrial, utility, or other use, such as, but not limited to, clearing, grubbing, or grading of land, and structural improvements, e.g., buildings, walls, fences, signs, and vehicular use areas.
received zoning approval.
b. If the expansion is 25% or greater or if expansions as of February 15, 1991, cumulatively result in a 25% or greater expansion in land area, floor area
Floor Area
Same as Gross Floor Area.
Gross Floor Area
The sum of the horizontal areas of all floors of all buildings, including accessory buildings on a lot, measured from the exterior faces of the exterior walls or from the centerline of walls separating two buildings and includes elevator shafts and the stairwells at each story. Gross floor area includes floor space with structural headroom of six feet and six inches or more used for mechanical equipment; penthouses; attic space; interior balconies; mezzanines; and service bays but does not include any interior space used for parking, loading, or loading space that is incidental to the principal use.
, lot coverage
Lot Coverage
The area of a lot covered by buildings, storage areas, and vehicular use areas. For specific application standards, refer to Section 6.4.3.
, or vehicular use area
Vehicular Use Area
Any area of a site or structure used for the movement, parking, or standing of motor vehicles. The vehicular use area includes access drives, maneuvering areas, refuse collection locations, loading spaces, and any landscaping and screening within ten feet of these areas.
, the standards of this section apply to the entire site
Site
The land area consisting of a portion of a lot, an entire lot, or contiguous lots, not including dedicated public property, designated for development as a single entity.
.
2. Buildings
Building
A structure having a roof supported by columns, posts, or walls and intended for the shelter, housing, or enclosure of any person, entity, animal, process, equipment, goods, or materials of any kind or nature.
10,000 Square Feet or Less
On sites
Site
The land area consisting of a portion of a lot, an entire lot, or contiguous lots, not including dedicated public property, designated for development as a single entity.
where the gross floor area
Gross Floor Area
The sum of the horizontal areas of all floors of all buildings, including accessory buildings on a lot, measured from the exterior faces of the exterior walls or from the centerline of walls separating two buildings and includes elevator shafts and the stairwells at each story. Gross floor area includes floor space with structural headroom of six feet and six inches or more used for mechanical equipment; penthouses; attic space; interior balconies; mezzanines; and service bays but does not include any interior space used for parking, loading, or loading space that is incidental to the principal use.
of the existing building
Building
A structure having a roof supported by columns, posts, or walls and intended for the shelter, housing, or enclosure of any person, entity, animal, process, equipment, goods, or materials of any kind or nature.
(s) is 10,000 square feet or less, expansions in square footage of land area, floor area
Floor Area
Same as Gross Floor Area.
Gross Floor Area
The sum of the horizontal areas of all floors of all buildings, including accessory buildings on a lot, measured from the exterior faces of the exterior walls or from the centerline of walls separating two buildings and includes elevator shafts and the stairwells at each story. Gross floor area includes floor space with structural headroom of six feet and six inches or more used for mechanical equipment; penthouses; attic space; interior balconies; mezzanines; and service bays but does not include any interior space used for parking, loading, or loading space that is incidental to the principal use.
, lot coverage
Lot Coverage
The area of a lot covered by buildings, storage areas, and vehicular use areas. For specific application standards, refer to Section 6.4.3.
, or vehicular use area
Vehicular Use Area
Any area of a site or structure used for the movement, parking, or standing of motor vehicles. The vehicular use area includes access drives, maneuvering areas, refuse collection locations, loading spaces, and any landscaping and screening within ten feet of these areas.
as follows.
a. If the expansion is less than 50%, the standards of this section apply only to the proposed expansion. Existing development
Development
Any human alteration to the state of land, including its vegetation, soil, geology, or hydrology, for any residential, commercial, industrial, utility, or other use, such as, but not limited to, clearing, grubbing, or grading of land, and structural improvements, e.g., buildings, walls, fences, signs, and vehicular use areas.
on the site
Site
The land area consisting of a portion of a lot, an entire lot, or contiguous lots, not including dedicated public property, designated for development as a single entity.
is subject to the zoning standards in effect at the time the existing development
Development
Any human alteration to the state of land, including its vegetation, soil, geology, or hydrology, for any residential, commercial, industrial, utility, or other use, such as, but not limited to, clearing, grubbing, or grading of land, and structural improvements, e.g., buildings, walls, fences, signs, and vehicular use areas.
received zoning approval.
b. If the expansion is 50% or greater or if expansions as of February 15, 1991, cumulatively result in a 50% or greater expansion in land area, floor area
Floor Area
Same as Gross Floor Area.
Gross Floor Area
The sum of the horizontal areas of all floors of all buildings, including accessory buildings on a lot, measured from the exterior faces of the exterior walls or from the centerline of walls separating two buildings and includes elevator shafts and the stairwells at each story. Gross floor area includes floor space with structural headroom of six feet and six inches or more used for mechanical equipment; penthouses; attic space; interior balconies; mezzanines; and service bays but does not include any interior space used for parking, loading, or loading space that is incidental to the principal use.
, lot coverage
Lot Coverage
The area of a lot covered by buildings, storage areas, and vehicular use areas. For specific application standards, refer to Section 6.4.3.
, or vehicular use area
Vehicular Use Area
Any area of a site or structure used for the movement, parking, or standing of motor vehicles. The vehicular use area includes access drives, maneuvering areas, refuse collection locations, loading spaces, and any landscaping and screening within ten feet of these areas.
, the standards of this section apply to the entire site
Site
The land area consisting of a portion of a lot, an entire lot, or contiguous lots, not including dedicated public property, designated for development as a single entity.
.
Source: City of Tucson, Tucson Code (Charter and General Ordinances) and Unified Development Code (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/tucson/latest/tucson_az_udc/0-0-0-5877Fetched: 10/28/2026