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.
Walnut Creek has adopted the California Plumbing Code (Title 24 Part 5) through Municipal Code Title 9. Permits are required for water heater replacement, gas line work, sewer lateral replacement or repair, water service line replacement, fixture additions, and whole-house repiping. Simple like-for-like fixture replacements (faucets, toilets) generally do not require permits. Water heater replacements require permits, seismic strapping, proper venting, temperature and pressure relief valve piping to exterior, and a drip pan with drain. Walnut Creek is served by EBMUD (East Bay Municipal Utility District) for water and sewer, and EBMUD's Regional Private Sewer Lateral Ordinance requires compliance certification at the time of property sale, major remodel, or water service change. Low-flow fixture retrofits under CA Civil Code 1101 are required at time of sale or major alteration. Backflow preventers are required for irrigation systems and pools. Work must be performed by a licensed C-36 plumbing contractor or owner-builder.
Contact your local code enforcement office for specific penalty information.
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