R-3 Zone in Tucson, AZ
R-3 zoning district rules in Tucson, AZ. Permitted uses, setbacks, height limits, and lot coverage requirements.
The R-3 zone in Tucson, AZ is a residential district (Multi-Family Low Density). Permits multi-family housing at low density, typically up to 4 units. Allows triplexes and fourplexes in addition to single-family and duplex uses. This zone requires a 15 ft front setback, 5 ft side setback, and 15 ft rear setback. Maximum building height is 40 feet (3 stories). Maximum lot coverage is 65%.
Common Permitted Uses
- Single-family homes
- Duplexes
- Triplexes
- Fourplexes
Permits multi-family housing at low density, typically up to 4 units. Allows triplexes and fourplexes in addition to single-family and duplex uses.
Setback Requirements
| Setback Type | Requirement |
|---|---|
| Front Setback | 15 feet |
| Side Setback | 5 feet |
| Rear Setback | 15 feet |
Tucson UDC. High-density multifamily — near employment centers and transit corridors.
Height Limits
- Max Height
- 40 feet
- Max Stories
- 3
Tucson UDC. High-density multifamily.
Lot Coverage
- Max Coverage
- 65%
Tucson UDC. High-density multifamily.
Parking Requirements
Single-family: 2 covered parking spaces required per single-family dwelling. Covered parking is strongly encouraged in Tucson's extreme heat to protect vehicles. Multi-family: 1.5–2 spaces per unit. Sun Tran bus routes reduce requirements near transit corridors.
Source: Tucson Unified Development Code Section 6.7.4 — Accessory Dwelling Units; Arizona HB 2297 (Laws 2024, Chapter 204). Last verified April 6, 2026. View source