Plumbing and HVAC rules in Michigan

In Michigan, a plumbing business holds a plumbing contractor license, and plumbers hold master, journey or apprentice licenses from the State Plumbing Board.^{1, 2, 3}

Michigan's Bureau of Construction Codes licenses mechanical contractors by type of work, such as HVAC equipment, ductwork, refrigeration, and limited or unlimited heating service.⁴

Michigan's plumbing code is the 2021 International Plumbing Code with state amendments.⁵ The Michigan Mechanical Code is the 2021 International Mechanical Code with state amendments.⁶

Ask your local building department whether replacing a water heater, furnace or AC needs a permit where you live.

If your home has a backflow preventer, your water utility can tell you whether it needs testing and who can test it.