Shed permit rules in Mosinee, WI — also referred to as storage shed, backyard shed, or accessory building regulations — set size limits, setbacks, and when a building permit is required.
Sheds in Mosinee are accessory structures regulated under Chapter 42 (Land Use and Regulation), Article II Zoning of the Mosinee Code of Ordinances. The City of Mosinee Building Inspections division requires a building permit for any garage or shed. Specific setback distances depend on the underlying residential zoning district (R-1 through R-5) and are administered by the City Clerk's office and the city's contracted Building Inspector. Sheds are also subject to Wis. Stat. 62.23 city zoning authority and the Wisconsin Uniform Dwelling Code (SPS 320-325).
Mosinee is divided into residential districts R-1 through R-5 under Chapter 42, Article II Zoning of the Code of Ordinances. The City's Building Permits webpage (mosinee.wi.us/buildingpermits) lists 'Garages and sheds' as one of the project categories that requires a building permit, and links to a separate 'Setback Info' worksheet and 'Plot Plan Worksheet' that applicants must use when laying out a shed location relative to lot lines and the principal dwelling. Residential zoning and setback questions are handled by City Clerk Bruce Jamroz at 715-693-2275 or clerks@mosinee.wi.us; residential building inspections are performed by Kevin Breit, Director of Public Works, at 715-573-1756 or sjbreit@charter.net. Chapter 42, Article II, Division 8 Site Building of the Mosinee Code (nodeId COOR_CH42LAUSRE_ARTIIZO_DIV8SIBI) sets the dimensional standards for accessory structures. Mosinee's zoning code was last comprehensively updated in 1998 and has been amended by ordinance since. State law layers on top of the local rules: Wis. Stat. 62.23 grants the city its zoning authority, and the Wisconsin Uniform Dwelling Code in SPS 320 to 325 governs one- and two-family dwellings and certain accessory structures, with electrical work for any shed needing power administered through the Wisconsin Department of Safety and Professional Services. Marathon County does not exercise general zoning authority within the City of Mosinee; the Marathon County Conservation, Planning and Zoning Department's authority is limited to county shoreland-floodplain rules under Wis. Stat. 59.692 and Wis. Admin. Code NR 115 / NR 116 where applicable to riverfront parcels. To verify the specific setback distance, height limit and lot-coverage rule that applies to a particular Mosinee parcel, applicants must download the Setback Info worksheet from mosinee.wi.us/buildingpermits or call the City Clerk's office at 715-693-2275 before placing a shed.
A shed installed without a building permit, in the front yard, or inside the side or rear setback established for the parcel's residential district violates Chapter 42, Article II of the Mosinee Code and is enforceable by the City's Building Inspector and Public Works Director. Typical responses include a stop-work order, an order to relocate or remove the structure, and after-the-fact permitting fees. Continued non-compliance is enforced as a forfeiture under Chapter 1, General Provisions of the Code, and may be referred to the City Attorney for abatement. Floodplain placement issues on riverfront parcels can additionally trigger Marathon County Conservation, Planning and Zoning enforcement under Wis. Stat. 59.692 and Wis. Admin. Code NR 116.
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