Tucson, AZ Zoning
Districts & Requirements
Every zoning district in Tucson with permitted uses, setbacks, height limits, and density requirements — in plain English. Tucson uses a Unified Development Code (UDC) with traditional Euclidean zoning — zones progress from low-density residential (R-1) through high-intensity commercial (C-3) and industrial (I-2). In December 2025, the city approved a Middle Housing amendment allowing duplexes, triplexes, fourplexes, townhouses, and cottage courts in all residential zones citywide (except rural). The Downtown Infill Incentive District (IID) overlays much of the urban core with relaxed standards to encourage density.
15
Zoning districts
8
Overlay districts
549,000
Population
2025
Code adopted
Quick Reference
Find your district, see what you can do. Click any row for details.
| District | At a glance | Height | Coverage |
|---|---|---|---|
| R-1 | Standard single-family lots. Now allows middle housing (duplex-fourplex) under the 2025 amendment. | 28 ft | 40% |
| R-2 | Medium-density multifamily. 3,000 SF per unit. The bridge between single-family and apartment-scale. | 36 ft | 50% |
| R-3 | High-density apartments. Up to ~14 units/acre. Three stories, 40-ft height. Major apartment projects. | 40 ft | 50% |
| O-3 | Intensive office with residential and limited retail. 40-ft height. Good mixed-use conversion play. | 40 ft | 50% |
| C-1 | Neighborhood commercial. Low-intensity retail compatible with adjacent residential. 40-ft height. | 40 ft | 70% |
| C-2 | Community-scale commercial. Drive-throughs allowed. Auto-oriented uses. 40-ft height. | 40 ft | 70% |
| C-3 | Regional commercial. Highest-intensity retail. 75-ft height. Big-box, auto malls, entertainment. | 75 ft | 75% |
| OCR-1 | Mid-rise mixed-use. Office, commercial, and high-density residential. Up to 75 ft. | 75 ft | 80% |
| OCR-2 | High-rise mixed-use. Up to 300 ft. Tucson's most permissive commercial zoning. | 300 ft | 80% |
| MU | General mixed-use. Residential, commercial, and office. Medium density with 40-ft height. | 40 ft | 70% |
| NC | Small-scale commercial nodes. Limited size and hours. Designed to serve surrounding residents. | 28 ft | 50% |
| P-I | Clean industrial parks. Office, R&D, light manufacturing in enclosed buildings. No outdoor operations. | 40 ft | 60% |
| I-1 | Light manufacturing, warehousing, distribution. Some outdoor operations. Wider buffers to residential. | 40 ft | 70% |
| I-2 | Heavy manufacturing, processing, outdoor storage. Largest setbacks. Fewest use restrictions. | 50 ft | 75% |
| PAD | Custom zoning with negotiated standards. Flexible but requires approval. Common for large projects. | Per approved plan | Per approved plan |
Residential — Single-Family
1 district in Tucson
R-1
ResidenceTucson's workhorse single-family district. 6,000 SF lots, 50-ft wide. The 2025 Middle Housing amendment now permits duplexes through fourplexes by right — a significant change to R-1's development potential.
What you can build
- ✓Single-family home
- ✓Duplex, triplex, fourplex (middle housing)
- ✓Townhouses and cottage courts
- ✓ADU (750 SF max or 50% of primary)
- ✓Home occupation
- ✗Large apartment complexes (5+ units)
- ✗Commercial or retail
- ✗Industrial
Key numbers
- Height
- 28 ft
- Lot min
- 6,000 SF
- Width
- 50 ft
- Coverage
- 40%
- Front
- 20 ft
- Side
- 5 ft (3 ft accessory)
- Rear
- 15 ft (3 ft accessory)
What this means in practice
40% coverage on 6,000 SF = 2,400 SF footprint. Two stories gets you ~4,500 SF. The middle housing play changes R-1 math completely — a fourplex on a standard lot pencils for small-scale investors who previously needed R-2 or R-3 zoning. Watch for lot width constraints on attached products.
Residential — Medium Density
1 district in Tucson
R-2
ResidenceMedium-density residential allowing apartments, townhouses, and all single-family types. 3,000 SF per unit density translates to roughly 14 units per acre — enough to make small apartment projects pencil.
What you can build
- ✓Single-family home + ADU
- ✓Duplex through fourplex
- ✓Townhouses
- ✓Small apartment buildings
- ✓Group dwellings
- ✗Standalone commercial
- ✗Industrial
- ✗High-rise (height-limited)
Key numbers
- Height
- 36 ft
- Lot min
- 3,000 SF per unit
- Width
- 50 ft
- Coverage
- 50%
- Front
- 20 ft
- Side
- 5 ft (10 ft abutting R-1)
- Rear
- 15 ft
What this means in practice
3,000 SF per unit on a half-acre (21,780 SF) = 7 units. At 50% coverage and 36 ft height (3 stories), a half-acre site yields ~32,000 SF gross. Where R-2 abuts R-1, no structure can exceed 1 story within 50 ft of the boundary or 2 stories within 100 ft — plan your site layout accordingly.
Residential — High Density
1 district in Tucson
R-3
ResidenceTucson's highest-density residential-only zone. Allows large apartment complexes at up to ~14 units per acre. 40-ft height opens up three full stories. Most garden-style apartment complexes in Tucson sit in R-3.
What you can build
- ✓Large apartment buildings
- ✓Townhouse complexes
- ✓All lower-density housing types
- ✓Group dwellings
- ✓Senior housing
- ✗Standalone commercial or retail
- ✗Industrial
- ✗Office (need O-1+ or C-1+)
Key numbers
- Height
- 40 ft
- Lot min
- 3,000 SF per unit
- Width
- 50 ft
- Coverage
- 50%
- Front
- 20 ft
- Side
- 10 ft
- Rear
- 15 ft
What this means in practice
On a 1-acre R-3 site: ~14 units at 50% coverage and 3 stories = ~65,000 SF gross. That supports 40-50 apartments depending on unit mix. Surface parking works at this density — you don't need structured. R-3 is Tucson's bread-and-butter apartment zone and well-understood by lenders.
Office
1 district in Tucson
O-3
Office IntensiveThe most flexible office district. Allows office parks, medical complexes, multifamily residential, and limited retail. Found along major corridors like Broadway, Speedway, and Grant Road.
What you can build
- ✓Office buildings and medical offices
- ✓Multifamily residential
- ✓Limited retail (accessory to office)
- ✓Day care and personal services
- ✓Hotels
- ✗General retail or big-box
- ✗Drive-throughs
- ✗Industrial or manufacturing
Key numbers
- Height
- 40 ft
- Lot min
- 6,000 SF
- Width
- 60 ft
- Coverage
- 50%
- Front
- 20 ft
- Side
- 10 ft
- Rear
- 15 ft
What this means in practice
O-3 is often overlooked for residential development, but the multifamily entitlement is real. If you find an underperforming O-3 office site on a corridor, evaluate it as a residential conversion or redevelopment play. The 40-ft height and 50% coverage yield the same building envelope as R-3 but with commercial income potential.
Commercial — Neighborhood
2 districts in Tucson
C-1
CommercialLow-intensity commercial designed to serve surrounding neighborhoods. Retail, restaurants, personal services, and offices. Found at intersections and small commercial nodes scattered through residential areas.
What you can build
- ✓Neighborhood retail and restaurants
- ✓Office and professional services
- ✓Personal services (salon, dry cleaner)
- ✓Multifamily residential
- ✓Mixed-use buildings
- ✗Drive-throughs (conditional use)
- ✗Auto sales, repair, or service
- ✗Outdoor storage or display
- ✗Industrial
Key numbers
- Height
- 40 ft
- Lot min
- None
- Width
- None
- Coverage
- 70%
- Front
- 0 ft (20 ft abutting residential)
- Side
- 0 ft (10 ft abutting residential)
- Rear
- 0 ft (15 ft abutting residential)
What this means in practice
C-1 at 70% coverage with 0-ft setbacks to commercial neighbors is a real density play compared to residential zones. A 10,000 SF C-1 corner lot = 7,000 SF footprint, 3 stories = 21,000 SF mixed-use. The residential adjacency setbacks are the constraint — if you're surrounded by commercial, you can build lot-line to lot-line.
NC
Neighborhood CommercialSmall-scale commercial serving immediately adjacent neighborhoods. Size-limited to prevent big-box intrusion. Quieter operating hours. Found at minor intersections within residential areas.
What you can build
- ✓Small retail and convenience
- ✓Restaurants (limited size)
- ✓Personal services
- ✓Office
- ✓Day care
- ✗Drive-throughs
- ✗Auto-oriented uses
- ✗Large-format retail
- ✗Industrial
- ✗Bars or nightclubs
Key numbers
- Height
- 28 ft
- Lot min
- None
- Width
- None
- Coverage
- 50%
- Front
- 10 ft
- Side
- 10 ft
- Rear
- 15 ft
What this means in practice
NC is intentionally constrained — 28-ft height, 50% coverage, and no drive-throughs keep it neighborhood-scale. The play here is small-format: coffee shops, neighborhood restaurants, small offices. If you need more intensity, look for a C-1 or MU rezoning path. NC sites rarely justify ground-up construction — adaptive reuse of existing structures is more common.
Commercial — Community
1 district in Tucson
C-2
CommercialTucson's general-purpose commercial district. Auto-oriented uses, drive-throughs, larger retail. Found along major corridors like Speedway, Broadway, Grant, and Oracle. This is where the strip malls are.
What you can build
- ✓Retail and restaurants
- ✓Drive-throughs
- ✓Auto sales and service
- ✓Office and professional services
- ✓Hotels and motels
- ✓Multifamily residential
- ✗Heavy manufacturing
- ✗Salvage or wrecking yards
- ✗Outdoor heavy equipment storage
Key numbers
- Height
- 40 ft
- Lot min
- None
- Width
- None
- Coverage
- 70%
- Front
- 0 ft
- Side
- 0 ft (10 ft abutting residential)
- Rear
- 0 ft (15 ft abutting residential)
What this means in practice
C-2 is where the redevelopment opportunities are. Aging strip malls on half-acre C-2 sites along Speedway or Broadway are prime mixed-use conversion candidates. At 70% coverage and 40-ft height, a half-acre site yields ~45,000 SF of mixed-use — retail on the ground floor, 20-30 apartments above. Compare land cost to R-3 sites and run the numbers.
Commercial — Regional
1 district in Tucson
C-3
CommercialTucson's most intensive commercial zone. Large-format retail, auto malls, entertainment complexes, and regional shopping centers. Found near freeway interchanges and major arterial intersections like I-10/I-19.
What you can build
- ✓Large-format retail and big-box
- ✓Auto malls and dealerships
- ✓Entertainment and recreation
- ✓Office buildings
- ✓Hotels
- ✓Multifamily residential
- ✗Heavy industrial manufacturing
- ✗Salvage or wrecking yards
Key numbers
- Height
- 75 ft
- Lot min
- None
- Width
- None
- Coverage
- 75%
- Front
- 0 ft
- Side
- 0 ft (15 ft abutting residential)
- Rear
- 0 ft (15 ft abutting residential)
What this means in practice
The jump from 40 ft (C-2) to 75 ft (C-3) is significant — 5-6 stories. On a 2-acre C-3 site at 75% coverage: ~65,000 SF footprint, 5 floors = 325,000 SF gross. That's a major mixed-use project. C-3 parcels near I-10 interchanges trade at a premium because the entitlement supports hotel, office, and large retail.
Mixed Use
1 district in Tucson
OCR-1
Office/Commercial/ResidentialTucson's mid-rise mixed-use district. Allows office, commercial, and high-density residential in the same building or site. Found in activity centers and along transit corridors.
What you can build
- ✓Office towers (mid-rise)
- ✓Apartment buildings
- ✓Retail and restaurants
- ✓Hotels
- ✓Mixed-use buildings
- ✗Heavy industrial
- ✗Salvage or wrecking
- ✗Outdoor heavy equipment storage
Key numbers
- Height
- 75 ft
- Lot min
- None
- Width
- None
- Coverage
- 80%
- Front
- 0 ft
- Side
- 0 ft (15 ft abutting residential)
- Rear
- 0 ft (15 ft abutting residential)
What this means in practice
75 ft at 80% coverage = 5-6 stories of mixed-use, built nearly lot-line to lot-line on commercial frontages. On a 1-acre site: ~35,000 SF footprint, 5 floors = 175,000 SF. That's 120-150 apartments or a substantial office building with ground-floor retail. Structured parking is likely at this intensity.
Mixed Use — High Rise
1 district in Tucson
OCR-2
Office/Commercial/ResidentialTucson's highest-intensity mixed-use zone. 300-ft height limit accommodates true high-rise development. Found in major activity centers — primarily downtown and along the streetcar corridor. FAR up to 10.5 with IID overlay.
What you can build
- ✓High-rise office towers
- ✓Apartment towers
- ✓Hotels (full-service)
- ✓Large-scale retail
- ✓Entertainment and cultural facilities
- ✓Mixed-use towers
- ✗Heavy industrial
- ✗Salvage or outdoor storage
Key numbers
- Height
- 300 ft
- Lot min
- None
- Width
- None
- Coverage
- 80%
- Front
- 0 ft
- Side
- 0 ft
- Rear
- 0 ft
What this means in practice
OCR-2 is Tucson's trophy zoning — 300 ft with 0-ft setbacks on all sides. A half-acre OCR-2 site could theoretically support 500,000+ SF of development. Practically, Tucson's market hasn't pushed above 15-20 stories, but the entitlement is there. Pair with the IID overlay for parking reductions and additional incentives. Below-grade or structured parking is mandatory.
Mixed Use — General
1 district in Tucson
MU
Mixed UseTucson's general-purpose mixed-use zone permitting low to medium density residential alongside commercial uses from the O-3 through C-2 intensity range. Encourages walkable, integrated development.
What you can build
- ✓Mixed-use buildings
- ✓Apartments and townhouses
- ✓Retail and restaurants
- ✓Office
- ✓Live/work units
- ✗Heavy commercial (auto sales, drive-throughs)
- ✗Industrial
- ✗Outdoor storage
Key numbers
- Height
- 40 ft
- Lot min
- None
- Width
- None
- Coverage
- 70%
- Front
- 0 ft
- Side
- 0 ft (10 ft abutting residential)
- Rear
- 0 ft (15 ft abutting residential)
What this means in practice
MU is designed for walkable infill — no drive-throughs, no auto-oriented uses. The 0-ft setbacks and 70% coverage create a street-wall condition. On a quarter-acre site: ~7,600 SF footprint, 3 stories = 22,800 SF mixed-use. The typical MU product is ground-floor retail with 2 floors of apartments above.
Industrial — Park
1 district in Tucson
P-I
Park IndustrialTucson's cleanest industrial zone. All operations must be conducted within enclosed structures. Designed for office parks, R&D facilities, and light manufacturing. Found in planned industrial areas like the Tucson Tech Park corridor.
What you can build
- ✓Office and R&D facilities
- ✓Light manufacturing (enclosed)
- ✓Warehouse and distribution
- ✓Data centers
- ✓Limited retail (accessory)
- ✗Outdoor manufacturing or storage
- ✗Heavy industrial processing
- ✗Residential (caretaker only)
- ✗General retail
Key numbers
- Height
- 40 ft
- Lot min
- None
- Width
- None
- Coverage
- 60%
- Front
- 20 ft
- Side
- 0 ft (20 ft abutting residential)
- Rear
- 0 ft (20 ft abutting residential)
What this means in practice
P-I is where tech companies, defense contractors, and clean manufacturers land. The enclosed-operations requirement keeps it compatible with adjacent uses. If a P-I site is near a developing residential or commercial corridor, evaluate the rezoning potential — converting to MU or OCR-1 can significantly increase land value.
Industrial — Light
1 district in Tucson
I-1
Light IndustrialLight industrial allowing manufacturing, processing, and warehousing with limited external impacts. Some outdoor operations permitted. Larger setbacks buffer residential neighbors.
What you can build
- ✓Light manufacturing and assembly
- ✓Warehouse and distribution
- ✓Truck terminals
- ✓Auto repair and body shops
- ✓Contractor yards
- ✗Heavy manufacturing with major emissions
- ✗Residential (caretaker only)
- ✗General retail
Key numbers
- Height
- 40 ft
- Lot min
- None
- Width
- None
- Coverage
- 70%
- Front
- 20 ft
- Side
- 0 ft (25 ft abutting residential)
- Rear
- 0 ft (25 ft abutting residential)
What this means in practice
I-1 sites on the south side and near the airport are the last-mile logistics play. At 70% coverage, a 2-acre site yields ~61,000 SF of warehouse footprint — enough for a mid-size distribution facility. If you're near downtown or the streetcar line, the long-term value may be in a rezoning to commercial or mixed-use.
Industrial — Heavy
1 district in Tucson
I-2
Heavy IndustrialTucson's heaviest zoning. Manufacturing, processing, salvage, outdoor storage. Minimal use restrictions but significant setback requirements to buffer adjacent properties.
What you can build
- ✓Heavy manufacturing and processing
- ✓Salvage and recycling operations
- ✓Large-scale outdoor storage
- ✓Mining and extraction
- ✓Utility installations
- ✗Residential (caretaker only)
- ✗Schools or day care
- ✗Hospitals
Key numbers
- Height
- 50 ft
- Lot min
- None
- Width
- None
- Coverage
- 75%
- Front
- 25 ft
- Side
- 10 ft (25 ft abutting residential)
- Rear
- 10 ft (25 ft abutting residential)
What this means in practice
I-2 land is cheap but the use restrictions on neighboring properties can limit exit strategies. If you're buying I-2 near a transitioning area, check the comprehensive plan — the city may have future land use designations that support a rezoning. I-2 sites near I-10 or the airport have the strongest industrial fundamentals.
Planned Development
1 district in Tucson
PAD
Planned Area DevelopmentMaster-planned communities with custom dimensional standards negotiated through the rezoning process. PADs can mix uses, adjust setbacks, modify density, and create unique development standards. Common for large subdivisions, mixed-use centers, and master-planned communities.
What you can build
- ✓Per approved development plan
- ✓Can include any mix of uses
- ✓Custom density and height
- ✓Phased development
- ✗Anything not in the approved plan
- ✗Modifications require amendment process
Key numbers
- Height
- Per approved plan
- Lot min
- Per approved plan
- Width
- Per approved plan
- Coverage
- Per approved plan
- Front
- Per approved plan
- Side
- Per approved plan
- Rear
- Per approved plan
What this means in practice
PAD is the most common rezoning path for large projects in Tucson. You negotiate everything — uses, density, height, setbacks, design standards. The trade-off is time and cost: expect 6-12 months for the rezoning process including neighborhood meetings, Planning Commission, and Mayor & Council votes. If your project doesn't fit a standard zone, PAD is your path.
Development Bonus Program
Tucson's primary density incentive is the Downtown Infill Incentive District (IID), which offers parking reductions (as low as zero in some subdistricts), modified setbacks, increased FAR, and streamlined review for projects in the greater downtown area. The 2025 Middle Housing amendment is the other major incentive — duplexes through fourplexes are now permitted by right in all residential zones citywide, no rezoning needed. For affordable housing, the city offers fee waivers, expedited review, and GPLET (Government Property Lease Excise Tax) incentives through the Tucson Industrial Development Authority. If you're building downtown, stack the IID overlay with GPLET for the best pro forma.
Overlay Districts
Downtown Infill Incentive District (IID)
Covers greater downtown including Rio Nuevo, Downtown Core, Fourth Avenue, Main Gate, Iron Horse, and Warehouse subdistricts. Provides relaxed parking requirements, modified setbacks, increased FAR, and height bonuses to encourage urban infill. The IID has been the primary tool enabling downtown Tucson's development boom — hotels, apartments, and adaptive reuse projects. If your site is in the IID, you likely have more entitlement than the base zone suggests. Check the subdistrict for specific incentives.
Historic Preservation Zones (HPZ)
Tucson has over 30 HPZs including Barrio Viejo, El Presidio, Armory Park, West University, Fort Lowell, Sam Hughes, Pie Allen, and Iron Horse. All exterior modifications visible from the public right-of-way require design review by a neighborhood advisory board. Demolition requires separate review. Budget 1-3 extra months for HPZ review on any project. New construction must be compatible with the historic character — modern designs are possible but need careful navigation.
Hillside Development Zone (HDZ)
Applies to slopes greater than 15%. Limits grading, requires enhanced site design, and protects natural landforms. Common on the north and east sides of Tucson near the Catalina Foothills. Buildable area is significantly reduced on steep sites — run a topo survey before making an offer. Native plant preservation requirements add cost.
Scenic Corridor Zone (SCZ)
Protects views along designated scenic routes including Gates Pass Road, Tanque Verde Road, and parts of Ina Road. Height limits, enhanced setbacks, and view corridor protections apply. Structures must be sited to minimize impact on mountain views. If you're on a scenic corridor, expect additional design review and possible height reductions below the base zone maximum.
Environmental Resource Zone (ERZ)
Protects sensitive environmental areas including riparian corridors, washes, and habitats. Encroachment into buffer areas is restricted. Common along the Rillito, Pantano, and Santa Cruz River corridors. If your site includes or abuts a major wash, the ERZ can significantly reduce buildable area. Get a site assessment early.
Gateway Corridor Zone (GCZ)
Enhanced development standards for major entry corridors into Tucson including I-19 frontage, Oracle Road, and Ajo Way. Height restrictions, setback requirements, and design standards aim to improve the visual quality of these gateways. Additional landscaping and screening requirements apply.
Airport Environs Zone (AEZ)
Covers areas around Tucson International Airport and Davis-Monthan Air Force Base. Noise contour maps determine use restrictions — residential is prohibited or conditional in high-noise areas. Height limits protect flight paths. If your site is in the AEZ, check the noise district before committing — it can kill residential projects entirely.
Neighborhood Preservation Zone (NPZ)
Overlay protecting established neighborhood character with standards for setbacks, materials, and architectural compatibility. Less restrictive than HPZ — no advisory board review — but infill projects must match existing scale and design patterns. Found in older neighborhoods that want protection without full historic designation.
Frequently Asked Questions
How do I check zoning for a specific property in Tucson?
Use the Pima County GIS portal (gis.pima.gov) or the City of Tucson's mapping tools — enter an address to see the base zone and any overlays. Pay attention to overlay districts like the IID, HPZ, or ERZ, which can significantly change what you can build beyond the base zone standards.
What is the Middle Housing amendment?
Approved in December 2025, it allows duplexes, triplexes, fourplexes, townhouses, and cottage courts by right in all residential zones citywide — except rural zones (RH). No rezoning required. This applies to R-1, R-2, R-3, and all other residential districts. Arizona state law (HB 2721) mandated middle housing within one mile of downtown, but Tucson went further and applied it citywide.
What is the Infill Incentive District?
The IID is a zoning overlay covering greater downtown Tucson with multiple subdistricts: Rio Nuevo, Downtown Core, Fourth Avenue, Main Gate (near UA), Iron Horse, Warehouse, and others. It provides relaxed parking requirements, modified setbacks, increased FAR, and streamlined design review. Most new downtown development uses IID incentives. Check which subdistrict your site falls in — the incentives vary.
Can I build an ADU in Tucson?
Yes, in all residential zones. ADUs are limited to 750 SF or 50% of the primary dwelling size, whichever is smaller. One additional off-street parking space is required. With the Middle Housing amendment, you now also have the option to build a duplex, triplex, or fourplex instead of (or in addition to) an ADU — compare the economics.
What are the historic preservation zone requirements?
Tucson has over 30 HPZs. Any exterior modification visible from the public right-of-way requires design review by the zone's advisory board. Demolition of contributing structures requires separate review and is difficult to obtain. New construction must be compatible with the historic character but does not have to replicate historic styles. Budget 1-3 extra months for the review process.
How does the airport noise zone affect development?
The Airport Environs Zone (AEZ) uses noise contour maps to restrict uses near Tucson International Airport and Davis-Monthan AFB. In high-noise areas (65+ DNL), new residential is prohibited or requires sound attenuation. Height limits protect flight paths. Always check the noise contour before pursuing residential projects near the airport or base — it can eliminate the use entirely.
What is a PAD rezoning?
Planned Area Development is Tucson's custom zoning tool. You negotiate uses, density, height, setbacks, and design standards through the rezoning process. Expect 6-12 months including neighborhood meetings, Planning Commission, and Mayor & Council approval. PADs are common for large projects that don't fit standard zones. The flexibility is the upside; the timeline and uncertainty are the trade-offs.
Get the full property profile for
any address in Tucson
Permitted uses, setbacks, density, buildable area, overlays, and nearby development activity — for a specific parcel, not just the district.