3 rules for unincorporated Waukesha County, Wisconsin.
Verified from official government sources
In unincorporated towns zoned by Waukesha County, typical residential setbacks are a 50-foot front-yard setback (35 feet from a Local Road), a 20-foot minimum offset from side and rear lines, and 75 feet from wetlands. Shoreland lots add a 75-foot setback from a lake or river.
Waukesha County Shoreland & Floodland Protection Ordinance (setbacks)
Shore, Floodplain, and Wetland Setback: Every Structure shall have a setback of at least seventy-five (75) feet from the Ordinary High Water Mark of a Navigable Waterway and Wetland.
In county-zoned unincorporated towns, principal residential structures are generally capped at 35 feet on narrow lots (under 65 feet average width) and 44 feet on wider lots, with flat-roof buildings limited to 35 feet. Cities and villages set their own height limits.
Waukesha County Basic Zoning Ordinance (Maximum Height - Principal Structures)
Overall maximum height (lowest exposure to highest peak), thirty-five (35) feet, for Structures on a Lot with an average width less than sixty-five (65) feet.
In county-zoned unincorporated towns, once sanitary sewers are installed, total impervious coverage of a lot may not exceed 75 percent and the building footprint may not exceed 50 percent. Prior to sewers, stricter limits apply. Shoreland parcels face additional impervious-surface controls.
Waukesha County Basic Zoning Ordinance (impervious coverage)
Upon installation of sanitary sewers, the total impervious coverage shall not exceed seventy-five percent (75%) and the Building Footprint shall not exceed fifty percent (50%).
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