ADU rules in Wayne County, MI β also called accessory dwelling unit regulations or granny flat ordinances β cover setbacks, owner-occupancy, parking, and permit requirements.
Michigan has no statewide ADU mandate, so rules vary by Wayne County city. Detroit permits ADUs in most residential zones, while many suburbs restrict or prohibit them outright.
Michigan does not have a statewide law requiring cities to permit accessory dwelling units (ADUs) the way California, Oregon, and Washington do. As a result, ADU rules in Wayne County, Michigan are determined entirely by each of the 43 municipalities. Detroit revised its zoning ordinance in 2021 to permit ADUs (called accessory dwelling units or coach houses) in most residential zones, with size capped at 800 square feet or 33 percent of the primary dwelling (whichever is smaller), owner-occupancy required on the lot, and standard setback and height limits. Dearborn, Hamtramck, and Ferndale-adjacent suburbs allow limited ADUs, often restricted to attached in-law suites or detached structures on larger lots. Many Wayne County suburbs including Livonia, Westland, Taylor, and Canton Township prohibit ADUs outright or require a special use permit with public hearing. Short-term rental (STR) use of an ADU is subject to additional local regulation, with Detroit requiring STR registration. Utility connections typically require a separate water and sewer meter or shared-meter agreement with DWSD or the local utility.
Contact your local code enforcement office for specific penalty information.
Wayne County, MI
Wayne County does not regulate residential fence heights. Under Michigan's Zoning Enabling Act (MCL 125.3101 et seq.), zoning authority over fences rests wit...
Wayne County, MI
Residential pool safety in Wayne County is governed by the Michigan Residential Code (Appendix G, adopted under Public Act 230 of 1972), which is enforced lo...
Wayne County, MI
Michigan does not mandate E-Verify for private employers. Wayne County and Detroit have not adopted E-Verify ordinances. Federal contractors meeting FAR thre...
Wayne County, MI
Michigan is not a sanctuary state, but Detroit operates as a Welcoming City under 2017 Executive Order limiting police cooperation with ICE detainers absent ...
Wayne County, MI
Michigan's Earned Sick Time Act (MCL Β§408.961+) took effect February 2025 after the Mothering Justice ruling, requiring Wayne County employers to provide one...
Wayne County, MI
Michigan's Mothering Justice ruling (July 2024) restored the voter-approved minimum wage path, lifting Wayne County's floor from $10.33 to $12.48 in February...
See how Wayne County's adu rules rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.