Macomb County, MI Accessory Structures: ADU Rules (2026)

Michigan's land-use framework gives general zoning authority to cities, villages, and townships under the Michigan Zoning Enabling Act, codified at MCL 125.3101 through 125.3702 (Public Act 110 of 2006). MCL 125.3201 authorizes local legislative bodies to enact zoning ordinances regulating land use and development. Counties may zone only in unincorporated, unzoned territory, and once a township adopts its own zoning ordinance the township ordinance controls (MCL 125.3209). Macomb County is fully covered by city and township zoning, so there is no county ADU rule. Michigan has no statewide ADU statute comparable to California's SB 9/SB 13 framework — the legislature has considered ADU bills (e.g., HB 4221 of 2021) but none have passed into general preemption. Consequently, ADU permissibility, size, owner-occupancy, parking, and short-term rental coupling vary by jurisdiction. Macomb Township's zoning ordinance is administered through the Planning Department at 54111 Broughton Road, Macomb, MI 48042; Sterling Heights, Warren, Roseville, Clinton Township, St. Clair Shores, and Mount Clemens each maintain separate zoning ordinances administered by their own building/planning departments. Building construction itself, regardless of zoning, must comply with the Stille-DeRossett-Hale Single State Construction Code Act (PA 230 of 1972, MCL 125.1501) and the Michigan Residential Code.