A carport is treated as an accessory structure under county town zoning. It counts toward the two-building limit and the accessory-building footprint cap (600 sq ft on lots under 14,000 sq ft), must meet district side-lot offsets, and sit at least 10 ft from the house. Cities and villages set
The County Basic Zoning Ordinance defines an accessory building broadly and applies its accessory-building standards to carports. Sec. 3.11(4) caps combined accessory-building footprint by lot size and Sec. 3.11(4)(E) limits a lot to two accessory buildings. Offsets follow the district; Sec. 3.09(3)(A) reduces required side offsets on narrow lots (as low as 5 ft on lots 35 ft wide or less). Any detached accessory structure must be at least 10 ft from the principal building (Sec. 3.09(5)). Attached carports are treated as part of the principal structure and follow the home's setbacks. Municipalities regulate carports inside their limits.
Installing a carport without required zoning permits or beyond the footprint/number limits can trigger removal orders and daily forfeitures under the town zoning ordinance.
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Waukesha, WI
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Waukesha, WI
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See how Waukesha's carport rules rules stack up against other locations.
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