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Michigan’s Bureau of Construction Codes (within LARA) adopts the building, mechanical, plumbing, energy and electrical codes statewide, based on the 2021 I-Codes with Michigan amendments. One consistent rulebook across the state — unlike local-control states.
Statewide consistency lowers diligence cost — one edition across jurisdictions, versus checking every city as you would in a local-control state.
Michigan LARA code books (free); ICC Digital Codes for the I-Codes.
Michigan LARA code books →Use the single statewide 2021 edition as your basis for commercial work — and confirm the residential status separately (see below).
The 2021 Michigan Mechanical & Plumbing Codes took effect statewide (Mar 2024); the 2021 Michigan Building Code took effect for commercial/general construction (Apr 9, 2025); the 2021 Michigan Commercial Energy Code took effect (Apr 22, 2025).
Commercial is settled on 2021 — price building, mechanical, plumbing and commercial energy to the 2021 Michigan editions.
Michigan LARA Bureau of Construction Codes — 2021 Michigan Building/Mechanical/Plumbing/Commercial Energy Codes.
Michigan LARA code books →Price commercial scope to the 2021 Michigan editions.
The 2021 Michigan Residential Code and residential energy provisions were adopted but paused by a July 2025 court order amid litigation — leaving the 2015 residential code arguably still in force. Until the litigation resolves, the enforced residential edition may still be the 2015 code.
Residential is the open question — 2021 vs 2015 changes energy and construction requirements on homes. Guessing wrong means redesign or a failed inspection. Confirm before you draw.
2025 court order pausing the 2021 residential & energy rules; Michigan LARA Bureau of Construction Codes. Confirm the current enforced residential edition with LARA.
Michigan LARA code books →Confirm the current enforced residential edition with LARA before you design to it — and watch for the ruling.
🏙️ Cities in Michigan
Codes and zoning are set locally — pick a city for its building codes, zoning & parcel lookup.
🗓️ Recent & upcoming changes
2021 Michigan Mechanical & Plumbing Codes took effect statewide.
2021 Michigan Building Code took effect (commercial / general construction).
2021 Michigan Commercial Energy Code took effect.
A court order paused the 2021 Residential code and residential energy rules amid litigation — the 2015 edition may still govern homes. Confirm the enforced residential edition with LARA before relying on either.
What's in effect
Statewide code via LARA
Michigan's Bureau of Construction Codes (within LARA) adopts the building, mechanical, plumbing, energy and electrical codes statewide, based on the 2021 I-Codes with Michigan amendments. That gives you one consistent rulebook across the state — unlike local-control states.
The residential exception
The 2021 Michigan Residential Code and residential energy provisions were adopted but their implementation was paused by a 2025 court order during litigation. Until that resolves, the enforced residential edition may still be the 2015 code — a real design and energy-cost difference. Confirm the current status with LARA for your project.
See the actual code → Michigan LARA code books (free) · ICC Digital Codes for the I-Codes💵 How this hits your costs
- Commercial is settled on 2021 — price building, mechanical, plumbing and commercial energy to the 2021 Michigan editions.
- Residential is the open question. 2021 vs 2015 changes energy and construction requirements on homes — guessing wrong means redesign or a failed inspection. Confirm before you draw.
- Statewide consistency lowers diligence cost — one edition across jurisdictions, versus checking every city as you would in a local-control state.
🏗️ Real estate development — opportunities & risk
Sources: Michigan LARA Bureau of Construction Codes (code books & adopted rules); 2021 Michigan Building/Mechanical/Plumbing/Commercial Energy Codes; 2025 court order pausing the 2021 residential & energy rules; ICC Digital Codes — Michigan.