RM-4 Zone in San Antonio, TX
RM-4 zoning district rules in San Antonio, TX. Permitted uses, setbacks, height limits, and lot coverage requirements.
The RM-4 zone in San Antonio, TX is a residential district (Residential Mixed Density). Permits a range of residential density from single-family through multi-family, often applied in transition areas between low-density and higher-density zones. This zone requires a 20 ft front setback, 10 ft side setback, and 10 ft rear setback. Maximum building height is 40 feet (3 stories). Maximum lot coverage is 60%.
Common Permitted Uses
- Single-family homes
- Duplexes
- Small apartment buildings
Permits a range of residential density from single-family through multi-family, often applied in transition areas between low-density and higher-density zones.
Setback Requirements
| Setback Type | Requirement |
|---|---|
| Front Setback | 20 feet |
| Side Setback | 10 feet |
| Rear Setback | 10 feet |
San Antonio UDC RM-4 (Multi-Family Residential, low density). Increased side and rear setbacks for multifamily use.
Height Limits
- Max Height
- 40 feet
- Max Stories
- 3
San Antonio UDC RM-4 — 40 ft, 3 stories for low-density multifamily.
Lot Coverage
- Max Coverage
- 60%
San Antonio UDC RM-4 — 60% lot coverage for low-density multifamily.
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