Estimating additions and ADUs in San Antonio, TX
Prices for additions and ADUs in San Antonio, TX, how they compare with the national median and what to know when bidding here, for remodeling contractors.
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Room addition prices in San Antonio
Q4 2026 pricing. Ranges are rounded to the nearest $50, or $100 from $5,000 up.
1 story over a basement
$37,800 to $251,200
150 to 1,000 square feet
National median: $45,700 to $302,100.
2 story over a basement
$57,900 to $389,900
150 to 1,000 square feet
National median: $69,300 to $464,400.
How San Antonio compares
Across the work in the cost data, San Antonio prices run 15% below the national median.
More work in San Antonio
- Kitchen remodelsCabinets, countertops, appliances and finishes.
- Bathroom remodelsTile, fixtures, vanities and plumbing rough-ins.
- GaragesOne and two car garages, framed and sided.
- Decks and porchesFraming, decking, railings and stairs.
- PaintingInterior and exterior, by surface area and substrate.
- Electrical workService upgrades, rough-ins, fixtures and finish work.
- All of San Antonio, TXEvery category, against the national median.
- Additions and ADUs nationallyNational ranges, cost drivers and the estimate's structure.
Estimate additions and ADUs with San Antonio prices
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