Norwalk, CA Building Setbacks & Zoning: Lot Coverage Limits (2026)

054 sets a flat rule for the R-1 zone: maximum allowable lot coverage shall not exceed 40% of the lot size. 056 imposes a parallel cap on floor area ratio, also capped at 40% of the lot size, so a homeowner has to satisfy both the footprint limit and the total-square-footage-to-lot-size limit at once rather than trading one against the other. Both sections were newly codified together by Ordinance 25-1762 on December 2, 2025, replacing older coverage rules in the prior residential zone chapter. 050(B) requires that any accessory structure built into the required rear yard still leave contiguous open space equal to 50% of that rear yard or 500 square feet, whichever is less.

Because coverage, FAR, setbacks, and the rear-yard open-space carve-out are all measured independently, a design can satisfy the 40% coverage cap and still be rejected at plan check for crowding the required open space or building envelope elsewhere in the chapter. Enforcement runs through the Community Development Department at building permit plan check for new construction, additions, garages, and accessory structures in the R-1 zone.