San Antonio adu construction pricing per square foot
ADU Construction cost per square foot in San Antonio, Texas in 2026.
Low
$144,000
Average
$216,000
High
$288,000
San Antonio crews quote about $240 – $480 per square foot.
Multiply local unit rates by your real measurements.
What drives adu construction prices in San Antonio
Local labor, permitting and climate move San Antonio prices away from the national average.
Labor market
San Antonio is the most affordable large Texas market for licensed trades.
Permits
City permits required for roofing, structural and mechanical work.
Climate
Heat and expansive soils drive HVAC and foundation spend.
San Antonio unit pricing by material
Ways to lower your San Antonio price
- Use pre-approved ADU plans where your city offers them — saves months and design fees.
- Detach only if required; attached and conversion ADUs cost far less.
- Collect three written bids on an identical scope — spreads of 20–40% are normal.
- Book in the off-season and stay flexible on the start date to save 5–15%.
- Bundle nearby work into one mobilization so you only pay setup and travel once.
- Ask what the contractor would change to cut 10% without hurting durability.
San Antonio questions
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