Do I need a permit for a retaining wall in San Diego, CA?

Short answer: It depends on the details for a retaining wall in San Diego, CA (for example: Over 3 ft: permit).

Last verified: 2026-10-19 · Confidence: high · Status: Verified from official source

Not legal advice. Always confirm with your local building department. Rules change, and your parcel's zoning, HOA, historic district, floodplain or utility work can change the answer. We show the official source and the date we last checked it so you can verify for yourself.

Depends on your project Confidence: high

No permit for retaining walls 3 ft or less (top of footing to top of wall) unless supporting a surcharge. Taller walls need a permit.

What changes the answer

Over 3 ft: permit

Cost

Fee not extracted; see San Diego Development Services. Unverified, confirm locally

Fee source: https://www.sandiego.gov/development-services/what-permits-do-i-need

Where to apply

City of San Diego Development Services Department (online permits)

Permitting authority: City of San Diego Development Services Department. Applies inside the City of San Diego. Exemptions do not apply to designated historical resources, historic districts, or work that needs a development permit (for example environmentally sensitive lands). See also: how to apply for a building permit.

Official sources

“Retaining walls that are 3 feet in height or less, measured from the top of the footing to the top of the wall unless supporting a surcharge or impounding flammable liquids.”

Source: https://docs.sandiego.gov/municode/MuniCodeChapter12/Ch12Art09Division02.pdf

Verified: 2026-10-19 · Status: verified · Confidence: high

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Other projects in San Diego

Retaining wall permits elsewhere in California

Retaining wall permits in other cities

Compare retaining wall permit rules in all 25 cities · All California cities