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    Plumbing Code Adoption

    Wisconsin Plumbing Code: Wisconsin Plumbing Code (SPS 382, UPC-based) 2021

    Wisconsin follows Wisconsin Plumbing Code (SPS 382, UPC-based) 2021 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
    Wisconsin Plumbing Code (SPS 382, UPC-based) 2021
    Last verified
    2026-05-29

    Related resources for Wisconsin

    Frequently Asked Questions

    What plumbing code does Wisconsin use?

    Wisconsin currently follows Wisconsin Plumbing Code (SPS 382, UPC-based) 2021 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 Wisconsin?

    Most plumbing work in Wisconsin — 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 Wisconsin 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 Wisconsin Plumbing Code (SPS 382, UPC-based) 2021 text is published by its model-code body (ICC, IAPMO, or NFPA depending on the trade).

    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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