Can you build an ADU in San Antonio, TX?

Unclear — verify with the town

The supplied source set does not include current ADU provisions from the UDC. Because San Antonio’s small-lot districts allow a range of housing forms, ADU potential may exist in some contexts, but that cannot be confirmed from these materials alone.

Confidence: low · Last researched May 2026

Dimensional standards in San Antonio, TX

R-3 — minimum front setback	ten (10) feet
R-3 — maximum front setback	thirty-five (35) feet
R-3 — minimum side setback	five (5) feet
R-3 — minimum rear setback	ten (10) feet

Related questions

Are short-term rentals allowed in San Antonio, TX?

San Antonio has a dedicated STR permit process administered through Development Services. The city provides an STR permit page, an STR permit application, and an STR application/permits/enforcement FAQ in its documents portal.

What are the setback requirements in San Antonio, TX?

Setbacks vary by district. Examples — R-3: ten (10) feet; R-3: thirty-five (35) feet; R-3: five (5) feet; R-3: ten (10) feet. Always confirm the exact yard requirements for your district with San Antonio, TX.

What is the minimum lot size in San Antonio, TX?

Minimum lot size depends on the zoning district — R-3: three thousand (3,000) square feet; R-3: twenty (20) feet; R-3: seventy-five (75) feet.

Full investor analysis

You've seen the general rule. The full San Antonio, TX report shows which districts allow ADUs by-right vs. by special permit, the approval path and timeline, and the overlay/flood constraints that quietly kill ADU projects here. First town report is free.

Get the full San Antonio, TX report free →

More about San Antonio, TX zoning

View the full San Antonio, TX zoning report →

This summary is AI-generated from public municipal sources and is not legal, engineering, or land-use advice. Always verify zoning with San Antonio, TX officials before making decisions.

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