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    Plumbing Code Adoption

    California Plumbing Code: California Plumbing Code (Title 24, Part 5) 2022

    California follows California Plumbing Code (Title 24, Part 5) 2022 as the basis for plumbing work. Permits and inspections are issued by the local Authority Having Jurisdiction (AHJ), which may publish additional amendments.

    Adoption details

    Model code family
    IPC / UPC
    Adopted edition
    California Plumbing Code (Title 24, Part 5) 2022
    Last verified
    2026-05-29

    Note: CPC is based on the UPC with California amendments. Local jurisdictions may amend further.

    Related resources for California

    Frequently Asked Questions

    What plumbing code does California use?

    California currently follows California Plumbing Code (Title 24, Part 5) 2022 for plumbing work. Always confirm the in-force edition with the local Authority Having Jurisdiction (AHJ) — county or city amendments can apply.

    Do I need a permit for plumbing work in California?

    Most plumbing work in California — including new installations, system replacement, and gas-fueled appliance hookups — requires a permit from the local building department and an inspection at completion. Homeowner permits are typically allowed for owner-occupied residences; commercial work requires a licensed contractor.

    Where do I check California plumbing code amendments?

    Local jurisdictions (city or county) often publish amendments on the state's building-codes board website or in the municipal code. The current California Plumbing Code (Title 24, Part 5) 2022 text is published by its model-code body (ICC, IAPMO, or NFPA depending on the trade).

    Are there any unusual plumbing requirements in California?

    CPC is based on the UPC with California amendments. Local jurisdictions may amend further.

    Reference guidance only — adoption editions and local amendments vary by city or county. Always confirm requirements with your local Authority Having Jurisdiction (AHJ) before designing, permitting, or constructing.

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