Fence Installation Permits in Downey

Local Rule

City of Downey Building and Safety Division; Downey

Downey requires a Building Division permit, plus Planning and Engineering approval, for any block wall or fence over 42 inches (3.5 feet) in height; walls or fences under 42 inches are exempt from a building permit. This local threshold is notably stricter than California's unamended statewide fence-permit baseline. Retaining walls over 4 feet, measured from the bottom of the footing to the top of the wall, also need a permit unless supporting a surcharge or Class I/II/IIIA liquids. Commercial fencing needs sign-off from Planning, Building, Fire, and Engineering. Fence and simple accessory-structure permits for single-family properties can be issued over-the-counter with a short application and a flat fee.

Source · Verified September 2026

Downey Building Department

Hours and procedures can change — call ahead to confirm.

How This Compares to Los Angeles County

Downey's own rule is shown above (No permit under 4 sqft). Here is the separate rule that applies at the county level, for context:

Regional Planning / LA County

In unincorporated Los Angeles County, a fence under 6 feet does not need a building permit, though its placement may need Department of Regional Planning approval and fire-hazard zones require non-combustible materials; over 6 feet needs a permit. The City of Los Angeles and other cities set their own limits (commonly 6 feet rear, 42 inches front). California's Good Neighbor Fence Law governs shared costs.

See the full county page

Nearby Cities with Verified Rules

Other cities near Downey with a confirmed fence installation rule:

FAQs

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