Do you need a permit for a retaining wall in San Diego, CA?
It depends on the details of your project.
San Diego exempts retaining walls only up to 3 ft, lower than most cities.
The height is measured from the top of the footing.
A wall that holds back extra load (a surcharge) needs a permit at any height.
A person last checked these rules on October 22, 2026. This is guidance only, so confirm with San Diego before you build.
Check your exact lot
Your zoning district sets the setbacks, and a flood zone can change the permit answer. Enter your address to see both.
Permits a retaining wall can need in San Diego
| Permit | When it applies |
|---|---|
| Building permit | San Diego exempts only retaining walls 3 ft or less that hold back no extra load. |
| Floodplain development permit | Grading and walls in a FEMA special flood hazard area need a floodplain 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
- San Diego Development Services
- Phone: (619) 446-5000
Common questions
- When does a retaining wall need a building permit in San Diego?
- San Diego exempts only retaining walls 3 ft or less that hold back no extra load. A wall 3 ft or less, with no load above it, needs no permit in San Diego.
- Where do I apply for a retaining wall permit in San Diego?
- Apply through San Diego Development Services, or call (619) 446-5000.
Sources
- San Diego Municipal Code § 129.0203, exempt structures (retaining walls, walks, pools, patio covers). Checked 2026-10-22
(5) Retaining walls that are 3 feet in height or less, measured from the top of the footing to the top of the wall [not supporting a surcharge]... (7) Sidewalks and driveways that are 30 inches or less above adjacent grade, are not over any basement or stor…
- 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...