Accessory Structures in Waukesha, WI (2026)
2 verified accessory structures rules for Waukesha, Wisconsin, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
The City of Waukesha regulates accessory dwelling units through Chapter 22 (Zoning) of the Municipal Code, adopted under Wisconsin's local zoning enabling authority at Wis. Stat. Sec. 62.23. Wisconsin has no statewide ADU preemption law, so ADUs are permitted only where Chapter 22 expressly allows them as accessory uses, generally subject to lot size, owner-occupancy, and conditional use review by the Plan Commission. Detached ADUs must also comply with Wisconsin's Uniform Dwelling Code (SPS 320-325) for one- and two-family construction.
ADU Rules in Waukesha
Some RestrictionsShed Rules
Sheds in the City of Waukesha are accessory structures regulated under Chapter 22 (Zoning) of the Waukesha Municipal Code and require a Garden Shed or Utility Shed permit from the Community Development Building Inspections Division. Permits are filed through the City's eTRAKiT portal. Building permit fees for residential sheds are charged at $0.33 per square foot, and any structural plan review for accessory buildings less than 500 square feet is a flat $125. Sheds may not be placed in a front or street yard.
Shed Rules in Waukesha
Some RestrictionsLooking for Waukesha County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Waukesha city rules.
Accessory Structures in Waukesha County →