ADU · San Antonio
ADU Construction in San Antonio, TX
The highest long-term ROI of any addition.
One of America's fastest-growing large cities runs on military, medical, and tourism demand, with older housing in historic King William and rapid suburban expansion pulling in opposite renovation directions.
ADUs are the fastest-growing residential category in 2026 for a reason: they pay for themselves. We match you with firms that build to code and to rent, detached, attached, or garage conversion, with the local ordinance know-how that makes or breaks the project.
San Antonio market
ADU in San Antonio: what the market looks like
Alamo Heights, Olmos Park, and Terrell Hills have high-end renovation stock; King William Historic District has its own architectural standards. Five major military installations create consistent mid-market demand from military families rotating through JBSA, Fort Sam, and Randolph AFB. No state income tax continues drawing retirees who invest in home improvements. Heat and humidity are the dominant envelope concerns.
Permits in San Antonio
City of San Antonio Development Services (COSA) handles permits. Historic districts have additional Architectural Review Committee approval steps, particularly in King William and Dignowity Hill. Texas has no mandatory state energy code, but COSA adopted its own energy requirements. The firms we match verify historic district status upfront and submit complete code-compliance documentation.
San Antonio conditions
ADU in San Antonio: the local detail that matters
San Antonio's lot rules, setbacks, and parking requirements decide what's buildable before any design starts, so the firms we match confirm zoning feasibility on your specific parcel first. In San Antonio's Texas heat and expansive-clay soils, a compact unit overheats quickly, so insulation, shading, and right-sized cooling are designed in from the start.
Our standard
What we require from adu construction firms in San Antonio
- Detached, attached, and garage-conversion ADUs
- Built to rent: separate metering and entrances
- Local ADU ordinance and setback expertise
- Income-property finish, built to rent well for years
ADU Construction in San Antonio, TX: your questions
What does adu construction cost in San Antonio, TX?
Alamo Heights, Olmos Park, and Terrell Hills have high-end renovation stock; King William Historic District has its own architectural standards. For adu construction specifically: Detached 400–800 sq ft: $100k–$250k. Garage conversions: $50k–$120k. Avg build ~$180k. National range: $50,000–$250,000. In San Antonio, TX, costs land near the national average for mid markets. Use our cost estimator for a scope-adjusted figure.
How long does adu construction take in San Antonio, TX?
A typical adu construction project runs 4 to 8 months. In San Antonio, the permit timeline matters as much as the build window: City of San Antonio Development Services (COSA) handles permits. The firms we match commit the completion date in writing.
What permits does adu construction require in San Antonio, TX?
City of San Antonio Development Services (COSA) handles permits. Historic districts have additional Architectural Review Committee approval steps, particularly in King William and Dignowity Hill. Texas has no mandatory state energy code, but COSA adopted its own energy requirements. The firms we match verify historic district status upfront and submit complete code-compliance documentation.
How do you match adu construction contractors in San Antonio, TX?
We vet remodeling firms in San Antonio before the first introduction: license verified, insurance confirmed, references called, complaint history reviewed. You describe the project, we send a short matched list of firms that work in San Antonio and specialize in adu construction. Free for homeowners.
Get matched for adu construction in San Antonio.
Tell us about your project. We hand you a short list of vetted local remodelers, free, and stay out of the rest. No phone-blasting, no pressure.