Swimming pool permit rules in Washtenaw County, MI — also covering above-ground pools, in-ground pools, and spa installations — set fencing, barrier, alarm, and inspection requirements.
Washtenaw County itself does not permit backyard pools. Michigan's statewide Residential Code requires a building permit for any pool, hot tub, or spa holding 24 inches or more of water. Apply through your city or township building department (Ann Arbor, Ypsilanti, etc.).
There is no countywide residential pool permit in Washtenaw County. Permits are issued by your local municipal building department under the 2015 Michigan Residential Code (adopted through the Stiles-DeRossett-Hale Single State Construction Code Act, MCL 125.1501). A building permit is required for any swimming pool, hot tub, or spa capable of holding water 24 inches deep or deeper. Separate electrical permits are required for all pool wiring, mechanical permits for heaters, and plumbing permits for automatic-fill systems. In Ann Arbor, apply through the Planning & Development Services Unit; townships and Ypsilanti run their own building offices. Public/commercial pools are separately licensed by the health department under state law.
Building without a required permit can trigger stop-work orders, double permit fees, and code-enforcement action by the local building department; unpermitted work may require inspection or removal.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Washtenaw County's pool permits rules stack up against other locations.
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