Zoning Report
Tucson, AZ Zoning
Tucson regulates land use through its Unified Development Code (UDC), which applies citywide and is supplemented by an Administrative Manual and a Technical Standards Manual. The city uses a broad set of base zones ranging from rural and single-family districts to office, commercial, and higher-intensity mixed-use areas, plus multiple overlay zones that can add extra rules in specific locations. Based on the sources provided, Tucson also has active entitlement and public-hearing processes for rezonings, special exceptions, appeals, and variances, with recent policy attention on accessory dwelling units and large-scale data center regulations.
Last researched May 2026
Zoning Districts in Tucson, AZ
RH
Rural Homestead zone intended to preserve rural character and orderly growth in rural areas.
Allowed uses: single-family residential (implied by zone description)
SR
Suburban Ranch zone for very low-density, large-lot single-family development and suburban ranch uses.
Allowed uses: single-family residential, suburban ranch uses
SH
Suburban Homestead zone for low-density, large-lot single-family development and suburban ranch and agriculture uses.
Allowed uses: single-family residential, suburban ranch uses, agriculture uses
RX-1
Suburban Residence zone for low-density single-family development, agriculture, and other compatible neighborhood uses.
Allowed uses: single-family residential, agriculture, compatible neighborhood uses
RX-2
Suburban Residence zone for low-density single-family development, agriculture, and compatible neighborhood uses.
Allowed uses: single-family residential, agriculture, compatible neighborhood uses
R-1
Urban Residence zone for low-density single-family development plus schools, parks, and public services.
Allowed uses: single-family residential, schools, parks, public services
R-2
Urban Residence zone for medium-density single-family and multifamily residential development plus public-serving uses.
Allowed uses: single-family residential, multifamily residential, schools, parks, public services
R-3
Urban Residence zone for higher-density residential development and other uses compatible with adjoining residential uses.
Allowed uses: residential development, other compatible uses
MH-1
Mobile Home zone for low- to medium-density residential development on individual lots and within mobile home parks.
Allowed uses: mobile homes on individual lots, mobile home parks, single-family residential
MH-2
Mobile Home zone for medium-density residential development of mobile homes on lots and within parks.
Allowed uses: mobile homes on individual lots, mobile home parks, single-family residential, residential care services
O-1
Office zone for administrative, medical outpatient, and professional office uses that complement nearby residential areas.
Allowed uses: administrative offices, medical outpatient, professional offices, residential uses in some cases
O-2
Office zone for office, medical, civic, and other uses reasonably compatible with adjoining residential uses.
Allowed uses: office, medical, civic, residential uses in some cases
O-3
Office zone for mid-rise office, medical, civic, and select other compatible uses.
Allowed uses: office, medical, civic, select other uses, residential uses in some cases
C-1
Low-intensity commercial zone intended to remain compatible with adjacent residential uses.
Allowed uses: low-intensity commercial, residential uses in some cases
C-2
General commercial zone serving community and regional markets.
Allowed uses: general commercial, residential uses in some cases
C-3
Mid-rise general commercial zone used downtown and in major activity centers.
Allowed uses: general commercial, higher-intensity commercial, residential uses in some cases
OCR-1
Office/Commercial/Residential zone intended for high-rise development in major activity centers or transit centers with encouraged mixed development.
Allowed uses: office, commercial, residential, mixed-use development
Recent Zoning Changes
The clearest recent adopted change in the provided sources is Tucson's October 2024 accessory dwelling unit amendment, which took effect November 21, 2024 and expanded ADU allowances in response to Arizona House Bill 2720. The provided planning materials also show an active 2026 review of proposed large-scale data center regulations, but the source set does not confirm final adoption.
Setbacks, Lot Size & Height Limits in Tucson, AZ
Tucson's dimensional rules vary significantly by district, with very large minimum lot sizes in rural and suburban zones and progressively higher densities in urban residential, office, and commercial districts. The strongest dimensional evidence in the provided sources comes from the city's July 2020 dimensional summary, which the city expressly says is for general reference only and should be cross-checked against Article 6 of the UDC.
| District | Standard | Requirement |
|---|---|---|
| RH | minimum lot area | 180,000 sq ft — From city summary table; verify in Article 6. |
| RH | maximum residential density | 1 unit — From city summary table. |
| RH | maximum building height | 25 feet — From city summary table. |
| SR | minimum lot area | 144,000 sq ft — From city summary table; verify in Article 6. |
| SR | maximum residential density | 1 unit — From city summary table. |
| SR | maximum building height | 25 feet — From city summary table. |
| SH | minimum lot area | 36,000 sq ft — From city summary table. |
| SH | maximum residential density | 2 units — From city summary table. |
| SH | maximum building height | 20 feet — From city summary table. |
| RX-1 | minimum lot area | 36,000 sq ft — From city summary table. |
| RX-1 | maximum residential density | 1 unit — From city summary table. |
| RX-1 | maximum building height | 20 feet — From city summary table. |
| RX-2 | minimum lot area | 16,000 sq ft — From city summary table. |
| RX-2 | maximum residential density | 1 unit — From city summary table. |
| RX-2 | maximum building height | 20 feet — From city summary table. |
| R-1 | minimum lot area | SF: 7,000 — Table also shows SF: 10,000 and nonresidential exceptions; verify parcel-specific applicability. |
| R-1 | maximum lot coverage | 70 — From city summary table. |
| R-1 | maximum building height | 25 — From city summary table. |
| R-1 | perimeter yard | 6' or 2/3(H); 10' or 3/4(H) — Adjacency-based according to summary footnote. |
| R-2 | minimum lot area | 5,000 — From city summary table. |
| R-2 | maximum residential density | MF: 15/ACRE — Table also shows 1 for some situations. |
| R-2 | maximum lot coverage | SF: 70; MF: 75 — From city summary table. |
| R-2 | maximum building height | 25 — From city summary table. |
| R-3 | minimum lot area | SF: 5,000 — Multifamily shown separately as density limit. |
| R-3 | maximum residential density | MF: 36/ACRE — From city summary table. |
| R-3 | maximum lot coverage | 70 — From city summary table. |
| R-3 | maximum building height | SF/CIVIC/ADMIN & PROF OFFICES: 25; MF/NONRES: 40 — From city summary table. |
| MH-1 | minimum lot area | SF/MH: 7,000 — From city summary table. |
| MH-1 | maximum residential density | MF/MH PARK: 8/ACRE — Table also shows 1 for SF/MH. |
| MH-1 | maximum lot coverage | 70 — From city summary table. |
| MH-1 | maximum building height | 25 — From city summary table. |
| MH-2 | minimum lot area | SF/MH: 5,000 — From city summary table. |
| MH-2 | maximum residential density | MF/MH PARK: 15/ACRE — Table also shows 1 for SF/MH. |
| MH-2 | maximum lot coverage | SF/MH/RES CARE SERVICES: 70; MF/MH PARK: 75 — From city summary table. |
| MH-2 | maximum building height | 25 — From city summary table. |
| O-1 | minimum lot area | RES: 7,000; NON: 10,000 — From city summary table. |
| O-1 | maximum residential density | 8/ACRE — From city summary table. |
| O-1 | maximum lot coverage | 70 — From city summary table. |
| O-1 | maximum building height | RES/OFFICE:16; OTHER:25 — From city summary table. |
| O-2 | minimum lot area | RES: 5,000; NON: 0 — From city summary table. |
ADU, Rental & Special Use Rules in Tucson, AZ
ADU
Accessory dwelling units, also called casitas, are permitted on residential lots in Tucson, subject to city regulations. Tucson first allowed them citywide on residential lots in late 2021, and the Mayor and Council adopted additional amendments in October 2024 to comply with state law and remove or relax several prior constraints.
- ADUs are permitted on residential lots / in zones that allow residential uses
- 2024 amendments increased the number of ADUs allowed per lot
- 2024 amendments changed how the maximum size of an ADU is calculated
- 2024 amendments adjusted ADU height limits
- 2024 amendments removed minimum parking requirements
Cannabis / marijuana uses
The permit review lanes include a 'Marijuana Use Authorization' permit type in the Standard Lane, and Zoning Examiner agendas show dispensary-related cases. The provided sources do not include the substantive zoning standards for cannabis uses.
- Marijuana Use Authorization appears in Standard Lane with a 20-business-day review goal
Overlay Districts in Tucson, AZ
Hillside Development Zone (HDZ)
Overlay listed in Article 5 of the UDC for hillside development areas.
Scenic Corridor Zone (SCZ)
Overlay listed in Article 5 of the UDC for scenic corridor areas.
Major Street and Routes Setback Zone (MS&R)
Overlay listed in Article 5 of the UDC affecting setbacks along major streets and routes.
Gateway Corridor Zone (GCZ)
Overlay listed in Article 5 of the UDC for gateway corridors.
Airport Environs Zone (AEZ)
Overlay listed in Article 5 for airport environs.
Environmental Resource Zone (ERZ)
Overlay listed in Article 5 for environmental resources.
“H” Historic Preservation Zone (HPZ) and “HL” Historic Landmark (HL)
Historic overlay / designation system listed in Article 5. The permit page states any development in an HPZ or HL requires a permit and Historic Preservation Design Review.
Drachman School Overlay Zone (DSO)
Neighborhood-specific overlay with its own permitted uses, setbacks, parking, lighting, landscaping, and design review sections in Article 5.9.
Tucson, AZ Zoning FAQ
Are ADUs allowed in Tucson, AZ?
Accessory dwelling units, also called casitas, are permitted on residential lots in Tucson, subject to city regulations. Tucson first allowed them citywide on residential lots in late 2021, and the Mayor and Council adopted additional amendments in October 2024 to comply with state law and remove or relax several prior…
What are the setback requirements in Tucson, AZ?
Setbacks vary by district. Examples — R-1: 6' or 2/3(H); 10' or 3/4(H). Always confirm the exact yard requirements for your district with Tucson, AZ.
What is the minimum lot size in Tucson, AZ?
Minimum lot size depends on the zoning district — RH: 180,000 sq ft; SR: 144,000 sq ft; SH: 36,000 sq ft; RX-1: 36,000 sq ft.
How tall can buildings be in Tucson, AZ?
Height limits are set per district — RH: 25 feet; SR: 25 feet; SH: 20 feet; RX-1: 20 feet.
What zoning districts are in Tucson, AZ?
Tucson, AZ includes districts such as RH, SR, SH, RX-1, RX-2, R-1, R-2, R-3.
Are there flood zones or overlay districts in Tucson, AZ?
Tucson's zoning framework clearly references several environmental and hazard overlays, including hillside, airport environs, environmental resource, and floodplain-related review tracks. The provided materials also show that floodplain permits exist and that parcel-level flood boundaries are mapped separately.
Have there been recent zoning changes in Tucson, AZ?
The clearest recent adopted change in the provided sources is Tucson's October 2024 accessory dwelling unit amendment, which took effect November 21, 2024 and expanded ADU allowances in response to Arizona House Bill 2720.
Common questions about Tucson, AZ zoning
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Deal-fit, approval path & risk flags for Tucson, AZ
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- Zoning Code City of Tucson — Confirmed that Tucson uses the Unified Development Code as its zoning code, identified supplemental manuals, urban overlay districts, MapTucson, and listed sunset-date notes for IID and sign standards.
- Summary of Dimensional Standards - City of Tucson — Provided base zone descriptions and the main dimensional values used in the zoning districts and dimensional standards sections.
- Accessory Dwelling Units Code Amendment City of Tucson — Provided the clearest adopted recent change and substantive special-use standards for ADUs, including the October 2024 amendment.
- Permits City of Tucson — Provided permit process overview, impact fee note, MapTucson / PRO references, and confirmation that HPZ, NPZ, and HL development requires Historic Preservation Design Review.
- Permit Review Lanes City of Tucson — Supplied published review targets for Express, Fast, Standard, and Complex lanes and listed permit classes such as ADUs, zoning compliance, floodplain use, marijuana use authorization, special districts, and historic review.
- Planning Commission City of Tucson — Documented current planning commission activity, especially the June 2026 large-scale data center regulations review.
- Zoning Examiner City of Tucson — Provided current rezoning and special-exception hearing examples and explained the Zoning Examiner's role in public hearings.
- 3.10. BOARD OF ADJUSTMENT APPEALS AND VARIANCES — Confirmed that the UDC includes formal appeals and variance procedures under the Board of Adjustment.
- Modifications, Appeals & Variances City of Tucson — Confirmed city-administered pathways for zoning modifications and variances.
- 5.9.7. HEIGHT AND SETBACK STANDARDS — Confirmed the UDC article structure, especially overlay zones including DSO, NPZ, CCT, IID, and UOD, though detailed text was not captured in the excerpt.
- 9.3. NONCONFORMING STRUCTURE — Confirmed Article 9 structure and that Tucson has rules for reconstruction, expansion, loss of nonconforming status, and nonconforming parking areas.
- Sec. 5.3.6: Nonconforming Use — Provided historical zoning administrator interpretations on nonconforming use and grandfathered parking situations; used cautiously as older guidance.
This summary is AI-generated from public municipal sources and is not legal, engineering, or land-use advice. Always verify zoning with Tucson, AZ officials before making decisions.