Beloit, WI Accessory Structures: ADU Rules (2026)

Chapter 19 of the Beloit Municipal Code is the City's Zoning Code, repealed and recreated by ordinance #2946. Wisconsin grants cities general zoning authority through Wis. Stat. Sec. 62.23, which is the statutory basis for Beloit's zoning ordinance. As of the current version of Chapter 19 published on Municode, the code is organized around base zoning districts (Article IV), overlay and special purpose districts (Article V), and use regulations (Article VI), and does not include a dedicated accessory dwelling unit chapter that establishes ADUs as a permitted accessory use across single-family districts. Where a homeowner wants to add a second dwelling unit, the City evaluates the proposal under the use regulations of the underlying district (e.g., whether two-family or multi-family dwellings are permitted in that district) and under the accessory uses, buildings, and structures standards. Variances and appeals from administrative decisions about the Zoning Code are heard by the Board of Appeals, which the City's website identifies as the body that considers applications for variances to the Zoning and Floodplain Ordinances. Building permits, including for any structure that contains a dwelling unit, are administered by the Community Development Department's Planning & Building Services Division at City Hall, 100 State Street. Because Chapter 19 has been amended over time, anyone planning an ADU-style project in Beloit should pull the current Chapter 19 text from Municode and confirm with Planning & Building Services which residential districts permit two-family or multi-family dwellings and what accessory structure standards apply.