Do HVAC contractors need a license in Michigan?

Yes. In Michigan, installing, altering or servicing mechanical work covered by the state construction code, including HVAC equipment, ductwork, hydronic heating and cooling, refrigeration and heating or air-conditioning service, requires a state mechanical contractor’s license in the matching classification. A municipality may not set its own licensing requirements for these classifications. An owner of a single-family dwelling that is or will be the owner’s residence may personally install a heating or refrigerating system in it under a permit. This is MCL 339.5809, 339.5807, 339.5811, 339.5819.

WhatMichigan
HVAC licenseState mechanical contractor license, by classification

Source

MCL 339.5809, 339.5807, 339.5811, 339.5819

Read the statute in the Michigan Compiled Laws (Michigan Legislature): legislature.mi.gov.

Checked against the statute on November 13, 2026.

This is a summary of a published statute, not legal advice. Rules change, local ordinances can add to them, and the terms of a specific lease may differ. Check the citation and speak to a lawyer before acting.

How Seayora uses this rule

A contractor on Seayora keeps each license with its issuing state, its expiry date and the last four digits of its number, and the business is warned before one lapses — on the website and both phone apps. A customer finding a pro on Seayora sees whether a license is on file.

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