International Building Code
Michigan enforces the 2021 IBC
The 2021 International Building Code (IBC) has been in force in Michigan since Apr 9, 2025. It applies statewide. Adopted by Department of Licensing and Regulatory Affairs (LARA), Bureau of Construction Codes. The legal citation is Mich. Admin. Code, Construction Code Part 4 (Building Code), rules filed Dec 10, 2024.
Record of adoption
Edition in force
2021 IBC
2021 Michigan Building Code
Verified
- In force since
- Legal citation
- Mich. Admin. Code, Construction Code Part 4 (Building Code), rules filed Dec 10, 2024
- Adopted by
- Department of Licensing and Regulatory Affairs (LARA), Bureau of Construction Codes
- Second reading
- Applies
- Statewide
- Also called
- Part 4, MBC
The Construction Code Part 4 rules were filed on Dec 10, 2024.
Coming next
- 2024 IBCPartialNo date yetIn developmentMich. Admin. Code, Construction Code Part 4
Draft dated Apr 21, 2026, moves the IBC from 2021 to 2024; advisory meeting May 21, 2026; not yet filed; effective 120 days after filing.
How Michigan adopts the IBC
The director promulgates the state construction code as administrative rules after public advisory meetings, with JCAR review and filing with the Secretary of State.
Cycle. Statute calls for updating the building code at least every 3 years to coincide with the national cycle; the 2021 edition took effect in 2025.
How it was checked
Verified
Two separate readings of the state’s own record agree, and the passage is on file word for word.
Read twice: a second, blind reading of the state’s record agreed with the first on .
The state’s record was last read on , from two source pages.
Evidence 3 sources
Sources for the record itself come first, the state’s own records ahead of others. A label marks a source about something else, such as an exception. A source marked secondary is not the state’s own record.
“2021 Michigan Building Code-Current Code-Effective April 9, 2025”
Code BooksMichigan LARA, Bureau of Construction Codesmichigan.gov (opens in a new tab)Agency pageRetrieved “The rules adopt by reference the 2021 edition of the International Building Code”
Part 4. Building Code rules were filed with the Secretary of StateMichigan LARA, Bureau of Construction Codesmichigan.gov (opens in a new tab)Agency pageRetrieved “filed with the Secretary of State on December 10, 2024”
“will become effective on April 9, 2025”
Part 4. Building Code rules were filed with the Secretary of StateMichigan LARA, Bureau of Construction Codesmichigan.gov (opens in a new tab)Agency pageRetrieved
Tracker cross-checks
Code adoption trackers are a cross-check. They are not Michigan’s own record.
ICC’s code adoption mapCross-checkAgrees with the record
Row Michigan 21 15 X ...; IBC = first value (2021)