Lot coverage is set by local zoning. Most Wayne County single-family residential districts cap building coverage at 25-35 percent, with higher allowances in denser urban districts.
Lot coverage refers to the percentage of a parcel occupied by buildings and structures, regulated by each municipal zoning ordinance under MCL 125.3202. In suburban Wayne County communities (Livonia, Canton Township, Plymouth Township, Northville), single-family residential districts typically cap building coverage at 25-35 percent. Denser districts in Detroit, Dearborn, Hamtramck, and Highland Park may allow 40-50 percent building coverage. Impervious surface coverage (including driveways, patios, and walkways) is regulated separately in many jurisdictions, often capped at 50-65 percent to comply with NPDES MS4 stormwater permit requirements enforced by the Michigan Department of Environment, Great Lakes, and Energy (EGLE). Accessory structures count toward total building coverage. Pools, decks, and pergolas may or may not count depending on ordinance definitions. Lot coverage variances are available from the local Zoning Board of Appeals upon proof of practical difficulty.
Contact your local code enforcement office for specific penalty information.
Wayne County, MI
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See how Wayne County's lot coverage limits rules stack up against other locations.
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