Plumbing Permits: Antioch vs Brentwood

Antioch requires plumbing permits for most fixture replacements, water heater swaps, repipes, sewer lateral work, and backflow assemblies under the California Plumbing Code adopted at AMC Title 8. Low-flow fixture requirements apply at time of sale under CA Civil Code 1101.

Brentwood requires plumbing permits for water heater replacements, repipes, sewer lateral work, gas line modifications, and most fixture relocations under the 2022 California Plumbing Code as adopted by the city. Like-for-like fixture swaps (faucets, toilets at the same location) generally do not require a permit, but water heaters always do.