Shed permit rules in Oshkosh, 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 Oshkosh are detached accessory structures regulated by Chapter 30 (Zoning Ordinance) of the Oshkosh Municipal Code, administered by the Planning Services Division at 215 Church Avenue. A detached accessory structure may not exceed 800 square feet, must be located only in the rear yard or side yard (never the front yard), and must sit at least 5 feet from the principal building unless built to fire-rating standards. Building permits for sheds and detached garages are administered by Inspection Services.
Oshkosh regulates sheds as detached accessory structures under Chapter 30 of the Oshkosh Municipal Code (Zoning Ordinance), with permitting handled by the Inspection Services Division and zoning review handled by Planning Services. The published Garage and Shed Zoning Code Requirements guide (dated 1/10/2024) sets four core rules. First, location: detached accessory structures, including sheds, are permitted only in the rear yard and side yards, not in the front yard. Second, maximum size: a detached accessory structure may not exceed 800 square feet of gross floor area, with the limit increasing by one square foot for every 100 square feet of lot area on lots larger than one acre. Third, separation: a detached shed must sit at least 5 feet from the principal structure (typically the house), except where the shed is constructed to fire-rating standards required by the Wisconsin Uniform Dwelling Code. Fourth, impervious surface and lot coverage limits apply per the underlying zoning district. The Inspection Services Division publishes the 1- and 2-Family Garage/Shed Building Guide, which administers building-permit submittals; pre-fab sheds and structures built off-site still require a permit when placed on a residential property because Oshkosh treats placement of a pre-fab unit as the construction event. Sheds also remain subject to Wisconsin Statute 62.23 zoning authority and to the Wisconsin Uniform Dwelling Code through the State of Wisconsin for any electrical or mechanical work. Property owners can confirm side, rear and front-yard setbacks for their specific zoning district by contacting Planning Services at 215 Church Avenue, Room 204, Level 2, or (920) 236-5059, weekdays 8:00 a.m. to 4:30 p.m.
A shed installed without a required permit, in the front yard, exceeding 800 square feet, or closer than 5 feet to the principal building without fire-rated construction violates Chapter 30 and the Wisconsin Uniform Dwelling Code, and is enforceable by the Oshkosh Inspection Services Division. Typical responses include a stop-work order, an order to relocate or remove the structure, and after-the-fact permit fees. Continued non-compliance is treated as a code violation forfeiture under the Oshkosh Municipal Code and may be referred for abatement.
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