Plumbing Permits: Concord vs Walnut Creek
How do plumbing permits rules compare between Concord, CA and Walnut Creek, CA?
Concord and Walnut Creek have similar restriction levels.
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 →Walnut Creek, CA
Contra Costa County
Walnut Creek requires plumbing permits for most plumbing work including water heater replacement, repiping, sewer lateral repairs, and fixture additions. The California Plumbing Code (CPC) governs installations, and EBMUD sewer lateral compliance applies at property transfer.
View full Walnut Creek rules →Key Facts Comparison
| Fact | Concord | Walnut Creek |
|---|---|---|
| - | - |
Highlighted rows indicate differences between cities.
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.
Walnut Creek FAQ
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