Accessory Structures in Warren, MI (2026)
3 verified accessory structures rules for Warren, Michigan, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Warren does not have a general ADU ordinance. Accessory dwelling units are not permitted by right in Warren. The city's zoning documents address only small accessory structures (sheds, garages) with no reference to secondary dwelling units.
Warren ADU (Accessory Dwelling Unit) Rules
Heavy RestrictionsShed Rules
Warren Zoning Ordinance Sec. 4.20 (amended by Ord. No. 30-300) permits one detached accessory structure per yard. No flammable substances stored within 10 feet of any residence. Permit required for construction.
Warren Shed & Outbuilding Rules
Some RestrictionsGarage Conversions
Garage conversions in Warren require a building permit. Conversions to living space must meet Michigan Residential Code standards for insulation, egress, and habitable space. Zoning approval may be required if use changes.
Warren Garage Conversion Rules
Some RestrictionsLooking for Macomb County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Warren city rules.
Accessory Structures in Macomb County →