San Antonio Zoning Overview

San Antonio is one of the largest cities in Texas with approximately 1,434,625 residents, located in Bexar County. The city manages land use and development through its local zoning ordinance, which divides the municipality into districts regulating permitted uses, building heights, lot sizes, setbacks, and density.

Note that Texas has no statewide building code. San Antonio adopts and enforces its own building codes locally, typically based on the International Building Code (IBC) and International Residential Code (IRC).

Primary Zoning Districts

San Antonio's zoning code includes several residential districts. The R-20 district requires a minimum lot size of 20,000 square feet with setbacks of 25 feet (front), 10 feet (side), and 25 feet (rear). The R-6 district requires 6,000 square foot minimum lots with setbacks of 25 feet (front), 5 feet (side), and 20 feet (rear). The R-4 district allows 4,000 square foot minimum lots with setbacks of 20 feet (front), 5 feet (side), and 15 feet (rear). All single-family districts have a 35-foot height limit.

The RM-4 (Multi-Family Residential) district accommodates higher-density housing including apartments, townhouses, and condominiums with a maximum height of 45 feet. Commercial activity is served by the C-1 (Light Commercial, 35 ft), C-2 (Commercial, 45 ft), and C-3 (General Commercial, 65 ft) districts. The I-1 (Light Industrial) and I-2 (Heavy Industrial) districts provide for industrial and manufacturing uses.

ADU (Accessory Dwelling Unit) Rules

San Antonio has allowed ADUs (Accessory Dwelling Units) since 2018. Texas does not have a statewide ADU mandate, but San Antonio has adopted its own ADU provisions through its Unified Development Code (UDC). Contact the City of San Antonio Development Services for current requirements including size limits, setbacks, owner-occupancy rules, and permitting procedures.

Development Process

Development in San Antonio generally requires obtaining the appropriate permits from the city's planning and building departments. The process typically involves:

1. Zoning Verification — Confirm that your proposed use is permitted in the applicable zoning district
2. Site Plan Review — For commercial and multi-family projects, submit a site plan for review
3. Building Permit — Apply for a building permit with construction documents
4. Inspections — Schedule required inspections during construction
5. Certificate of Occupancy — Obtain final approval before occupying the structure

For projects that do not conform to existing zoning, property owners may need to seek a variance, special exception, or rezoning through the local board of zoning appeals or planning commission.

Key Considerations

Before starting any development project in San Antonio, property owners should:

• Verify the zoning classification of their property
• Review setback, height, and lot coverage requirements for their specific district
• Check for any overlay districts or special regulations
• Determine if the property is in a flood zone using FEMA's flood map service
• Confirm whether HOA covenants or deed restrictions apply
• Contact Development Services at (210) 207-1111 for pre-application guidance

Disclaimer: This guide provides general information about zoning in San Antonio and should not be relied upon as legal advice. Zoning codes are subject to change. Always verify current regulations with the City of San Antonio Development Services or the municipal code before making development decisions.