R-3 Zone in San Antonio, TX
R-3 zoning district rules in San Antonio, TX. Permitted uses, setbacks, height limits, and lot coverage requirements.
The R-3 zone in San Antonio, TX 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 20 ft front setback, 5 ft side setback, and 5 ft rear setback. Maximum building height is 35 feet (2 stories). Maximum lot coverage is 40%.
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 | 20 feet |
| Side Setback | 5 feet |
| Rear Setback | 5 feet |
San Antonio UDC R-3 (Single-Family Residential) — standard single-family zone. 20 ft front, 5 ft side and rear setbacks.
Height Limits
- Max Height
- 35 feet
- Max Stories
- 2
San Antonio UDC R-3 — 35 ft height limit, 2 stories for single-family residential.
Lot Coverage
- Max Coverage
- 40%
San Antonio UDC R-3 — 40% maximum lot coverage for all impervious surfaces including structure, driveway, and patio.
Parking Requirements
Single-family: 2 spaces per single-family dwelling. Garage or paved off-street parking required. Multi-family: 1–2 spaces per unit depending on bedroom count. RM-4: 1.5 spaces per unit. RM-5: 1.25 spaces per unit.
Source: San Antonio Unified Development Code (UDC) Section 35-311 — Secondary Dwelling Units; library.municode.com/tx/san_antonio. Last verified April 6, 2026. View source