Do you need a permit for a deck in San Francisco, CA?
It depends on size and placement.
Building permit: California cities typically exempt only freestanding decks up to 200 sq ft and 30 in above grade that don't serve an exit door.
Floodplain development permit: If the lot is in a FEMA special flood hazard area, all development there needs a permit.
Rules last checked by a person on October 19, 2026. Guidance only; confirm with San Francisco before you build.
- We haven’t verified San Francisco’s deck rules yet. The answer below follows the model building code and may be wrong for San Francisco.
Check your exact lot
Setbacks depend on your zoning district, and a flood zone can change the permit answer. Enter your address to see both.
Permits a deck can need in San Francisco
| Permit | When it applies |
|---|---|
| Building permit | California cities typically exempt only freestanding decks up to 200 sq ft and 30 in above grade that don't serve an exit door.Confidence: low |
| Floodplain development permit | If the lot is in a FEMA special flood hazard area, all development there needs a permit. |
Local details
- Call 811 at least a few days before you dig footings or post holes. Utility locating is free.
- HOA covenants and deed restrictions can be stricter than city rules. Check yours before you build.
How to apply
- Check if your project needs a permit (sf.gov)
- SF Property Information Map
- Phone: (628) 652-3200
Questions people ask
- When does a deck need a building permit in San Francisco?
- California cities typically exempt only freestanding decks up to 200 sq ft and 30 in above grade that don't serve an exit door. Freestanding decks up to 200 sq ft and 30 in high that don't serve an exit door are typically exempt.
- Where do I apply for a deck permit in San Francisco?
- Apply through Check if your project needs a permit (sf.gov), or call (628) 652-3200.
Sources
- Example city, Sacramento Required permits (typical California exemptions; each city adopts its own list). Checked 2026-10-19.
One-story detached accessory structures, provided the floor area is not greater than 120 square feet. Fences not over 7 feet high.
- 44 CFR 59.1, definition of development (NFIP). Checked 2026-10-19.
Development means any man-made change to improved or unimproved real estate, including but not limited to buildings or other structures...
- 44 CFR 60.3, floodplain management criteria. Checked 2026-10-19.
Require permits for all proposed construction or other development in the community...