What does a home addition permit cost in San Antonio?
Updated November 11, 2026 · Built from official fee schedules and city permit records
How San Antonio figures the fee
Additions, remodels and accessory structures under 1,000 sq ft (single story) pay an existing-home building fee by size: $172.50 up to 500 sq ft and $488.80 from 501 to 1,000 sq ft. Finished projects under 1,000 sq ft need no separate plan review. Electricians, plumbers and HVAC contractors pull their own permits and link them to yours.
How long it takes
Across 408 home addition permits San Antonio issued in the last 12 months, the median wait was same day. A quarter took same day or less, and a quarter took 3 days or more.
Good to know
- Unfinished projects under 1,000 sq ft (exposed studs, no insulation) pay a flat $172.50.
- Larger additions are priced on the new-construction square-footage table.
More San Antonio permit guides
- Building permit cost in San Antonio
- How long permits take in San Antonio
- New house permit cost
- Roofing permit cost
- Fence permit cost
- Pool permit cost
Sources
- Fees: San Antonio DSD FY 2027 Development Fee Schedule (revised October 2026)
- Permit data: San Antonio Building Permits (data.sanantonio.gov), permits issued November 1, 2025 to October 31, 2026. Processing time is measured from submittal date to issue date.
This is an independent guide built from public records. It is not affiliated with the San Antonio Development Services Department (DSD). Fees change, and the city calculates your final fee when you apply; confirm the amount with the city before you budget.
Common questions
How much is a home addition permit in San Antonio?
$172.50 up to 500 sq ft or $488.80 from 501 to 1,000 sq ft, plus separate trade permits.
How long does an addition permit take in San Antonio?
The median was same day.