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Tucson, AZ Unified Development Code
TUCSON, AZ UNIFIED DEVELOPMENT CODE
UNIFIED DEVELOPMENT CODE
ARTICLE 1: GENERAL PROVISIONS
ARTICLE 2: REVIEW AUTHORITIES AND POWERS
ARTICLE 3: GENERAL PROCEDURES
ARTICLE 4: ZONES
ARTICLE 5: OVERLAY ZONES
ARTICLE 6: DIMENSIONAL STANDARDS AND MEASUREMENTS
ARTICLE 7: DEVELOPMENT STANDARDS
ARTICLE 7A: SIGN STANDARDS
ARTICLE 8: LAND DIVISION, LAND SPLIT, AND SUBDIVISION STANDARDS
ARTICLE 9: NONCONFORMING USES, BUILDINGS AND STRUCTURES
ARTICLE 10: ENFORCEMENT AND PENALTIES
ARTICLE 11: DEFINITIONS AND RULES OF CONSTRUCTION
PARALLEL REFERENCES
ADMINISTRATIVE MANUAL
TECHNICAL STANDARDS MANUAL
Tucson Administrative Directives
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6.3.4.   DIMENSIONAL STANDARD AND EXCEPTIONS TABLES
TABLE 6.3-1.A: DIMENSIONAL STANDARDS FOR THE RH, SR, SH, RX-1, & RX-2 ZONES
TABLE 6.3-1.B: EXCEPTIONS TO THE RH, SR, SH, RX-1, & RX-2 DIMENSIONAL STANDARDS
TABLE 6.3-2.A: DIMENSIONAL STANDARDS FOR THE R-1, R-2, R-3, MH-1, & MH-2 ZONES
TABLE 6.3-2.B: EXCEPTIONS TO THE R-1, R-2, R-3, MH-1, & MH-2 DIMENSIONAL STANDARDS
TABLE 6.3-3.A: DIMENSIONAL STANDARDS FOR THE O-1, O-2, & O-3 ZONES
TABLE 6.3-3.B: EXCEPTIONS TO THE O-1, O-2, & O-3 DIMENSIONAL STANDARDS
TABLE 6.3-4.A: DIMENSIONAL STANDARDS FOR THE C-1, C-2, C-3, OCR-1, & OCR-2 ZONES
TABLE 6.3-4.B: EXCEPTIONS TO THE C-1, C-2, C-3, OCR-1, & OCR-2 DIMENSIONAL STANDARDS
TABLE 6.3-5.A: DIMENSIONAL STANDARDS FOR THE P-I, I-2, & I-2 ZONES
TABLE 6.3-5.B: EXCEPTIONS TO THE P-I, I-1, & I-2 DIMENSIONAL STANDARDS
TABLE 6.3-6.A: DIMENSIONAL STANDARDS FOR THE OS, IR, P, & RV ZONES
TABLE 6.3-6.B: EXCEPTIONS TO THE OS, IR, P, & RV DIMENSIONAL STANDARDS
TABLE 6.3-7.A: DIMENSIONAL STANDARDS FOR THE NC, RVC, & MU ZONES
TABLE 6.3-7.B: EXCEPTIONS TO THE NC, RVC, & MU DIMENSIONAL STANDARDS
TABLE 6.3-1.A: DIMENSIONAL STANDARDS FOR THE RH, SR, SH, RX-1, & RX-2
Note: Several variables factor into determining a use’s required dimensional standards. See Section 6.3.2, Determining a Use’s Dimensional Standards, for further details.
Dimensional Standard
RH
SR
SH
RX-1
RX-2
Dimensional Standard
RH
SR
SH
RX-1
RX-2
Residential (maximum)
1/180,000 sf
1/144,000 sf
2/36,000 sf
1/36,000 sf
1/16,000 sf
/ (minimum)
180,000 sf
144,000 sf
36,000 sf
36,000 sf
16,000 sf
(maximum)
Res: N/A
Nonres: 20%
Res: N/A
Nonres: 15%
Res: N/A
Nonres: 15%
Res: N/A
Nonres: 15%
Res: N/A
Nonres: 15%
Height (maximum)
30'
30'
30'
30'
25'
[Standard based on the proposed use’s adjacency to a residential or nonresidential or ]
Section 6.4.5.C
Section 6.4.5.C
Section 6.4.5.C
Section 6.4.5.C
Section 6.4.5.C
Res Use Res
25'
25'
20'
20'
20'
Res Use Nonres
(H)
(H)
(H)
(H)
(H)
Nonres Use Res
4(H)
4(H)
20'
20'
20'
Nonres Use Nonres
0'
0'
0'
0'
0'
 
Key:
(H) = Height of the proposed exterior wall
MF = Multifamily (Section 6.3.3.C)
MH = Mobile Home Dwelling (Section 6.3.3.A)
MH Park = Mobile Home Park (Section 6.3.3.B)
N/A = Not Applicable
Nonres = Nonresidential (Section 6.3.3.D or .E, whichever is applicable)
Res = Residential (Section 6.3.3.H or .I, whichever is applicable)
SF = Single- Use (Section 6.3.3.J)
sf = square feet
= to
TABLE 6.3-1.B: EXCEPTIONS TO THE RH, SR, SH, RX-1, & RX-2 DIMENSIONAL STANDARDS
Use
Exceptions to the ’s Dimensional Standard
Use
Exceptions to the ’s Dimensional Standard
RH
•    Production, limited to stable or riding school (P)
•   Travelers’ Accommodations, Lodging (S)
 
(min.) = 10
(max.) = 10%
Renewable Energy Production (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
SR
Golf Course (P)
(min.) = 30  
•    Production, limited to commercial stables (P)
•   Travelers’ Accommodation, Lodging (P)
(min.) = 10
 
•   Communications, limited to wireless communication and (S)
•   Day care: Child Care (P and S)
•   Distribution system (S)
•   Parks and Recreation (P)
•   Religious Use (P)
(max.) = 50%
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
Protective Service (P - government owned and operated only)
(max.) = 50%
Height (max.) = 25'
 
Use
Exceptions to the ’s Dimensional Standard
Use
Exceptions to the ’s Dimensional Standard
SH
Golf Course (P)
(min.) = 30
Nonres Use to Res (min.) = 4(H)
•    Production, limited to commercial stables (P)
(min.) = 10
•   Travelers’ Accommodation, Lodging (P)
Nonres Use to Res (min.) = 4(H)
Service (P)
(min.) = 144,000 sf
Nonres Use to Res (min.) = 4(H)
Cemetery (S)
(min.) = 1
(max.) = 20%
Nonres Use to Res (min.) = 4(H)
•   Communications (P)
•   Parks and Recreation (P)
•   Religious Use (P)
(max.) = 50% 7
Motion Picture Industry (S)
(min.) = 36
Nonres Use to Res (min.) = 4(H)
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
Protective Service (P - government owned and operated only)
(max.) = 50%
Height (max.) = 25'
 
Use
Exceptions to the ’s Dimensional Standard
Use
Exceptions to the ’s Dimensional Standard
RX-1
Golf Course (P)
(min.) = 30
Nonres Use to Res (min.) = 4(H)
Travelers’ Accommodation, Lodging (P)
(min.) = 10
Nonres Use to Res (min.) = 4(H)
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
RX-2
Golf Course (P)
(min.) = 30
Nonres Use to Res (min.) = 4(H)
Educational Use: Elementary and Secondary School (P and S)
Nonres Use to Nonres (min.) = (H)
Crop Production (P)
(max.) = 50%
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
 
Key:
Max. = Maximum permitted
Min. = Minimum requirement
P = Permitted Use
S = Special Exception Use
Uses without a “P” or “S” indicates that the use is permitted in the
(Am. Ord. 11070, 5/14/2013)
TABLE 6.3-2.A: DIMENSIONAL STANDARDS FOR THE R-1, R-2, R-3, MH-1, & MH-2
Note: Several variables factor into determining a use’s required dimensional standards. See Section 6.3.2, Determining a Use’s Dimensional Standards, for further details.
Dimensional Standard
R-1
R-2
R-3
MH-1
MH-2
Dimensional Standard
R-1
R-2
R-3
MH-1
MH-2
Residential (maximum)
SF:1/7,000 sf
SF: 1/5,000 sf
SF: 1/5,000 sf
SF/MH: 1/7,000 sf
SF/MH: 1/5,000 sf
SF (2 units): 2/10,000 sf
MF: 15/
MF: 36/
MF/MH Park: 8/
MF & MH Park: 15/
/ (minimum)
SF (1 unit): 7,000 sf
SF (2 units): 10,000 sf
Nonres: see Exceptions
5,000 sf
SF: 5,000 sf
MF/Nonres: 0
7,000 sf
5,000 sf
(maximum)
70%
SF: 70%
MF: 75%
Nonres: see Exceptions
70%
70%
SF, MH, Res. Care Services: 70%
MF & MH Park: 75%
Nonres: see Exceptions
Height (maximum)
25'
25'
SF, Civic Uses, & Admin/Prof Offices: 25'
MF/Nonres: 40'
25'
25'
[Standard based on the proposed use’s adjacency to a residential or nonresidential or ]
Section 6.4.5.C
Section 6.4.5.C
Section 6.4.5.C
Section 6.4.5.C
Section 6.4.5.C
Res Use Res.
6' or 2/3(H)*
6' or 2/3(H)*
6' or 2/3(H)*
6' or 2/3(H)*
6' or 2/3(H)*
Res Use Nonres  
10' or ¾(H)*
10' or ¾(H)*
10' or ¾(H)*
10' or ¾(H)*
10' or ¾(H)*
Nonres Use Res or Nonres  
10' or ¾(H)*
10' or ¾(H)*
10' or ¾(H)*
10' or ¾(H)*
10' or ¾(H)*
 
* The greater of the two dimensions applies
Key:
(H) = of the proposed exterior wall
MF = Multifamily (Section 6.3.3.C)
MH = Mobile Home Dwelling (Section 6.3.3.A)
MH Park = Mobile Home Park (Section 6.3.3.B)
N/A = Not Applicable
Nonres = Nonresidential (Section 6.3.3.D or .E, whichever is applicable)
Res = Residential (Section 6.3.3.H or .I, whichever is applicable)
SF = Single- Use (Section 6.3.3.J)
sf = square feet
= to
(Am. Ord. 11070, 5/14/2013)
TABLE 6.3-2.B: EXCEPTIONS TO THE R-1, R-2, R-3, MH-1, & MH-2 DIMENSIONAL STANDARDS
 
Use
Exceptions to the ’s Dimensional Standard
R-1
Educational Use: Elementary and Secondary School (P & S)
(min.) = 20,000 sf
(max.) = 15%
Nonres Use to Nonres (min.) = (H)
•   Cultural use (S)
•   Parks and Recreation (P)
•   Religious use (P)
(min.) = 20,000 sf
(max.) = 60%
 
Cultural Use (P - government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
Day Care, Adult and Child (P & S)
(min.) = 7,000
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
Protective Service (P - government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
 
Use
Exceptions to the ’s Dimensional Standard
Use
Exceptions to the ’s Dimensional Standard
R-2
Educational Use: Elementary and Secondary School (P & S)
(min.) = 20,000 sf
(max.) = 15%
•   Cultural Use (S)
•   Parks and Recreation (P)
•   Religious Use (P)
(min.) = 20,000 sf
(max.) = 60%
Cultural Use (P - government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
Day Care, Adult (P)
(max.) = N/A
Day Care, Child – max. 30 children (P)
(min.) = 14,000 sf
(min.) = see Sec. 4.9.4.H.4
Day Care, Child – unlimited # of children (S)
(min.) = see Sec. 4.9.4.H.7
(min.) = see Sec. 4.9.4.H.4
Day Care, Child with extended hours (S)
(min.) & (min.) = see Sec. 4.9.4.H.9
Distribution System (S)
(max.) = N/A
(min.) (facility, walls and equipment) = 20' from any residential zone
Medical Services (S)
(min.) = 1.5
(max.) = 70%
Single-family, Attached (P)
(min.) = Equivalent to multi-family density (2,904 sf)
Residential Care Services, Adult Care Service or Physical and Behavioral Health Services – Max 10 residents
(max.) = 70%
•   Residential Care Services, Adult Care Service or Physical and Behavioral Health Services – Max 15 residents
•   Residential Care Services: Rehabilitation Service – children's facilities (P)
(max.) = N/A
Res. Use adjacent to Res. Zone (min.) = 10' or 3/4 (H)
Residential Care Services, Adult Care Service or Physical and Behavioral Health Services – unlimited number of residents
(min.) = 3 acres
(max.) = 50%
(min.) = 25' from all   residential zones
•   Residential Care Services: Rehabilitation Service or Shelter Care - Max. 15 residents (S)
•   Residential Care Services: Shelter Care – victims of domestic violence (P)
(min.) = 20,000 sf
Residential Care Services: Rehabilitation Service or Shelter Care – unlimited number of residents (S)
(min.) = 1.5 acres
(max.) = 60%
(min.) = 20' from all   residential zones
•   Cemetery (P)
•   Communications (P)
•   Communications, limited to wireless communication and (S)
•   Crop production (P)
(max.) = N/A
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
Administrative and Professional Office
(P - government owned and operated only)
(min.) = 43,560 sf
(max.) = 20%
Nonres. Use to Res. (min.) = 2(H)
Nonres. Use to Nonres. (min.) = 0
Postal Service
(P - Government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
Protective Service
(P - government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
 
Use
Exceptions to the ’s Dimensional Standard
Use
Exceptions to the ’s Dimensional Standard
R-3
Educational Use: Elementary and Secondary School
(P & S)
(min.) = 20,000 sf
(max.) = 15%
Cultural Use (S)
(min.) = 20,000 sf; (max.) = 60%
Day Care: Child – max 100 children (P)
(min.) = 10,000 sf
(min.) = See Sec. 4.9.4.H.4
Day Care: Child – unlimited number of children (S)
(min.) = 200 sf per child multiplied by the maximum enrollment for which the center is licensed, plus 4,000 sf
(min.) = See Sec. 4.9.4.H.4
Day Care: Child – extended hours for any number of children (S)
(min.) and (min.) = See Sec. 4.9.4.H.9
Distribution System (S)
(min.) = N/A
(min.) = of the facility, including walls or equipment, is 20' from any residential zone
Single-family, Attached (P)
(min.) = Equivalent to multi-family density (1,210 sf)
Residential Care Services: Rehabilitation Service – children's facilities (P)
(min.) = 0
Res. Use to Res. or Nonres. Zone (min.) = 10' or 3/4 (H)
Residential Care Services: Shelter Care – victims of domestic violence (P)
(min.) = 0
(max.) = 40'
Res. Use to Res. or Nonres. Zone (min.) = 10' or 3/4 (H)
Residential Care Services: Rehabilitation Service or Shelter Care – max 20 residents (S)
(min.) = 20,000 sf
Residential Care Services: Rehabilitation Service or Shelter Care – unlimited number of residents (S)
(min.) = 1.5 acres
(max.) = 40'
(max.) = 60%
Res. Use to Res. or Nonres. Zone (min.) = 20' from all   residential zones
•   Civic Assembly (P - Government owned and operated only)
•   Cultural Use (S)
•   Parks and Recreation (P)
•   Religious Use (P)
(min.) = N/A
•   Cemetery (P)
•   Communications (P)
•   Communications, limited to wireless communication and (S)
•   Crop Production (P)
•   Day Care: Adult Day Care (P)
•   Group Dwelling (P)
•   Medical Service (S)
•   Residential Care Services: Adult Care Service or Physical and Behavioral Health Service (P)
(min.) = N/A
Nonres Use to Res (min.) = 1½(H)
Nonres Use to Nonres (min.) = 0
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
Administrative and Professional Office
(P - government owned and operated only)
(min.) = 72,000 sf
(max.) = 60%
Nonres. Use to Res. (min.) = 2(H)
Nonres. Use to Nonres. (min.) = 0
 
Use
Exceptions to the ’s Dimensional Standard
Use
Exceptions to the ’s Dimensional Standard
MH-1
Educational Use: Elementary and Secondary School
(P & S)
(min.) = 20,000 sf
(max.) = 15%
 
•   Parks and Recreation (P)
•   Religious Use (P)
(min.) = 20,000 sf
 
Single-family, Attached (P)
(min.) = Equivalent to multi-family density (5,445 sf)
 
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A; Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
 
Communications, limited to wireless communication and (S)
(min.) = 5,000 sf
 
Cultural Use (P - government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
 
Protective Service
(P - government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
 
Use
Exceptions to the ’s Dimensional Standard
Use
Exceptions to the ’s Dimensional Standard
MH-2
•   Mobile Home Park (P)
•   Multifamily (P)
(max.) = 75%
 
Educational Use: Elementary and Secondary School
(P & S)
(min.) = 20,000 sf
(max.) = 15%
 
•   Parks and Recreation (P)
•   Religious Use (P)
(min.) = 20,000 sf
(max.) = 60%
 
Single-family, Attached (P)
(min.) = Equivalent to multi-family density (2,904 sf)
 
Renewable Energy Generation (S)
(min.) = 0
(max.) = N/A
Height (max.) = 16'
Nonres Use to Nonres (min.) = (H)
 
•   Communications (P)
•   Communications, limited to wireless communication and (S)
•   Crop Production (P)
•   Distribution System (S)
(max.) = N/A
 
Administrative and Professional Office
(P - government owned and operated only)
(min.) = 43,560 sf
(max.) = 20%
Nonres. Use to Res. (min.) = 2(H)
Nonres. Use to Nonres. (min.) = 0
 
Cultural Use (P - government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
 
Protective Service
(P - government owned and operated only)
(min.) = 20,000 sf
(max.) = 60%
 
Key:
Max. = Maximum permitted
Min. = Minimum requirement
P = Permitted Use
S = Special Exception Use
Uses without a “P” or “S” indicate the use is permitted within the
(Am. Ord. 11070, 5/14/2013; Am. Ord. 11127, 11/6/2013; Am. Ord. 11996, 3/21/2023)
TABLE 6.3-3.A: DIMENSIONAL STANDARDS FOR THE O-1, O-2, & O-3
Note: Several variables factor into determining a use’s required dimensional standards. See Section 6.3.2, Determining a Use’s Dimensional Standards, for further details.
Dimensional Standard
0-1
0-2
0-3
Dimensional Standard
0-1
0-2
0-3
Residential (maximum)
8/
8/
22/
/ (minimum)
Res: 7,000 sf
Nonres: 10,000 sf
Res: 5,000 sf
Nonres: 0 sf
Res: 5,000 sf
Nonres: 0 sf
(maximum)
Res: 70%
Nonres: N/A
Res: 70%
Nonres: N/A
Res: 75%
Nonres: N/A
Height (maximum)
Res, Office: 16'
Other: 25'
26'
Res: 25'
Nonres: 40'
[Standard based on the proposed use’s adjacency to a residential or nonresidential or ]
Section 6.4.5.C
Section 6.4.5.C
Section 6.4.5.C
Res Use Res or Nonres  
10' or ¾(H)*
10' or ¾(H)*
10' or ¾(H)*
Nonres Use Res or Nonres  
10' or ¾(H)*
10' or ¾(H)*
10' or ¾(H)*
 
* The greater of the two dimensions applies
Key:
(H) = of the proposed exterior wall
MF = Multifamily (Section 6.3.3.C)
MH = Mobile Home Dwelling (Section 6.3.3.A)
MH Park = Mobile Home Park (Section 6.3.3.B)
N/A = Not Applicable
Nonres = Nonresidential (Section 6.3.3.D or .E, whichever is applicable)
Res = Residential (Section 6.3.3.H or .I, whichever is applicable)
SF = Single- Use (Section 6.3.3.J)
sf = square feet
= to
(Am. Ord. 11070, 5/14/2013)
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