ADU rules in Racine, WI — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
The City of Racine regulates accessory dwellings and accessory structures through Chapter 114 (Zoning) of the Municipal Code, adopted under the city zoning authority granted by Wis. Stat. Sec. 62.23. Accessory uses, buildings, and structures are addressed in Article VII (Supplementary District Regulations), and the underlying residential district rules (R-districts) appear in Article V (District Regulations). Wisconsin does not have a statewide statute mandating that municipalities allow ADUs by-right, so whether a separate dwelling unit (attached or detached) is permitted on a single-family lot in Racine depends on the specific R-district provisions and may require a conditional use permit administered by the Department of City Development.
Chapter 114 of the Racine Municipal Code is the city's Zoning Ordinance, organized into Article I (In General), Article II (Administration and Enforcement), Article III (Conditional Uses), Article IV (Nonconforming Buildings, Structures and Uses), Article V (District Regulations), Article VI (Overlay Districts), Article VII (Supplementary District Regulations), Article VIII (Flood Regulations), Article IX (Shoreland and Wetland Regulations), Article X (Sign Regulations), and Article XI (Off-Street Parking and Loading). Accessory uses, buildings, and structures are governed under Article VII supplementary regulations together with the dimensional standards (lot area, lot width, building height, yard setbacks, lot coverage) of the underlying residential district under Article V. Conditional uses, including any second dwelling unit that is not allowed by-right in a given district, are processed under Article III through the Plan Commission and Common Council. The city's zoning authority is Wis. Stat. Sec. 62.23 (city planning and zoning). A building permit from the City of Racine Building Inspection Division is required for any new dwelling unit, addition, or detached accessory structure above the permit-exempt threshold, and zoning compliance is verified by the Department of City Development, City Hall, 730 Washington Avenue. Property owners considering an attached or detached additional unit should confirm the current text of their R-district and Article VII before designing, because dimensional caps (height, setbacks, footprint), owner-occupancy requirements, and parking standards are set there.
Constructing an accessory dwelling or accessory structure without zoning approval and a building permit violates Chapter 114 of the Racine Municipal Code. Enforcement is administered by the Building Inspection Division and Department of City Development and may include stop-work orders, citations, daily forfeitures under the city's general penalty provisions, and orders to remove or modify non-conforming structures. Occupying a second unit that is not a permitted or conditional use in the underlying R-district is independently enforceable, and unauthorized work can also trigger Wisconsin Uniform Dwelling Code (Wis. Admin. Code Ch. SPS 320-325) compliance issues.
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