The Construction Code – Part 4. Building Code rules were filed with the Secretary of State on December 10, 2024, and will become effective on April 9, 2025. The rules adopt by reference the 2021 edition of the International Building Code, with amendments, deletions, and additions deemed appropriate for use in Michigan.
Until the electronic and hard copies are available from the International Code Council (ICC), one can use the 2021 International Building Code with the Part 4 Michigan Amendments for the 2021 Michigan Building Code. The bureau will notify the public when each code’s electronic and hard copy versions are available for purchase and update the code book information on our website, which links to the ICC for purchase. Below are some important changes that have been made to the code.