Codes

ANN ARBOR, Michigan, April 10, 2025 — The City of Ann Arbor wants local developers, architects and builders to be aware enforcement of the 2021 Michigan Building Code (MBC) will begin effective May 1, 2025. Any building permit applications submitted on or after this date must comply with the updated code requirements. Residential Code will remain 2015 Michigan Residential Code until the State of Michigan adopts an updated Residential Code.

The 2021 MBC, adopted at the state level, introduces updated safety, energy efficiency and structural integrity standards. The transition to the new code aligns with Michigan’s efforts to enhance building safety and sustainability across the state.

The City of Ann Arbor is committed to maintaining high standards for building safety and efficiency. The city encourages all developers, architects and builders to familiarize themselves with the new code requirements to ensure compliance and an efficient permitting process.

Applications submitted for civil or building permits before May 1, 2025, will be reviewed under the previous 2015 Michigan Building Code, provided they are complete and meet all submission requirements. Incomplete applications may be subject to review under the updated 2021 MBC. 

Visit State of Michigan Licensing and Regulatory Affairs for more information.

Current Codes Enforced

Click to determine which ​​construc​​​​tion codes (pdf) are currently enforced.

Code books may be purchased directly from the State of Michigan or ICC International. All chapters of the City Code are available for viewing and printing online at no charge. ​