Plumbing Permits: Antioch vs Concord
How do plumbing permits rules compare between Antioch, CA and Concord, CA?
Antioch and Concord have similar restriction levels.
Antioch, CA
Contra Costa County
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.
View full Antioch rules →Concord, CA
Contra Costa County
Concord has adopted the 2022 California Plumbing Code in CMC Title 18. Permits are required for water heater replacements, repipes, sewer laterals, backflow devices, and fixture additions. The City participates in the Central Contra Costa Sanitary District (Central San) for sewer lateral standards.
View full Concord rules →Key Facts Comparison
| Fact | Antioch | Concord |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
Antioch FAQ
Concord FAQ
Do I need a permit to replace my water heater in Concord?
Yes. Even a like-for-like replacement requires a plumbing permit so the Building Division can verify seismic strapping, T&P relief, venting, and combustion air.
Who handles sewer lateral issues in Concord?
Central Contra Costa Sanitary District (Central San) regulates private sewer laterals. Concord issues the plumbing permit, but Central San sets lateral specifications.
Can a homeowner do their own plumbing in Concord?
Yes, owner-occupants of a single-family home may pull an owner-builder permit and perform their own work, subject to all required inspections.
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