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    Plumbing Code Adoption

    Massachusetts Plumbing Code: Massachusetts Uniform State Plumbing Code (248 CMR) 2023

    Massachusetts follows Massachusetts Uniform State Plumbing Code (248 CMR) 2023 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
    Massachusetts Uniform State Plumbing Code (248 CMR) 2023
    Last verified
    2026-05-29

    Note: Massachusetts uses its own 248 CMR code, not the IPC or UPC verbatim. Treat IPC/UPC selection as approximate and verify fixture-unit values against 248 CMR.

    Related resources for Massachusetts

    Frequently Asked Questions

    What plumbing code does Massachusetts use?

    Massachusetts currently follows Massachusetts Uniform State Plumbing Code (248 CMR) 2023 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 Massachusetts?

    Most plumbing work in Massachusetts — 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 Massachusetts 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 Massachusetts Uniform State Plumbing Code (248 CMR) 2023 text is published by its model-code body (ICC, IAPMO, or NFPA depending on the trade).

    Are there any unusual plumbing requirements in Massachusetts?

    Massachusetts uses its own 248 CMR code, not the IPC or UPC verbatim. Treat IPC/UPC selection as approximate and verify fixture-unit values against 248 CMR.

    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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