Plumbers and heating and cooling contractors in Wisconsin

Plumbing and HVAC rules in Wisconsin

Plumbing license

State license.^{1, 2, 3}

Heating and cooling license

State license.^{4, 5}

State codes

Wisconsin has its own state plumbing code (SPS 381 to 387).⁷ For commercial buildings, Wisconsin uses the 2021 International Mechanical Code with state changes.^{8, 9}

Replacement permits

Wisconsin's Uniform Dwelling Code doesn't apply to repairs of plumbing, heating or air conditioning systems, or to alterations of homes begun before the code took effect, though a municipality may adopt it for those. Permits for replacements are local.⁶

Plumbing and HVAC rules in Wisconsin

What plumbing and HVAC work costs in Wisconsin

These are published national ranges, not quotes. Local quotes vary.

Ranges from HomeAdvisor, HomeGuide, Fixr, Forbes Home, NYSERDA and the Massachusetts EEAC, checked September 2026.

What plumbing and HVAC work costs in Wisconsin