Accessory Structures in Fitchburg, WI (2026)
3 verified accessory structures rules for Fitchburg, Wisconsin, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Fitchburg allows one accessory dwelling unit per lot under § 22-230, capped at 75 percent of the principal home's floor area and 25 feet in height, built to the state Uniform Dwelling Code, with entrances only on the side or rear and no travel trailers or RVs allowed.
Fitchburg, WI Accessory Dwelling Unit Rules
Some RestrictionsFitchburg City Code § 22-230
(1)A maximum of one accessory dwelling unit shall be permitted on a lot of record.(2)The entrance for an accessory dwelling unit shall only be added to the side or rear of the primary dwelling unit. ... (6)Use of a travel trailer or recreational vehicle as an accessory dwelling unit shall be prohibited. All accessory dwelling units shall comply with the State of Wisconsin Uniform Dwelling and E...
ADU Impact Fees
Fitchburg's zoning code caps most lots at one accessory dwelling unit and bills new utility hookups like a brand-new house: Sec. 22-230(8) charges new water and sewer connections the same fees the city applies to any new residential dwelling unit, with no ADU discount written in.
Fitchburg, Wisconsin ADU Utility Fee Rules
Some RestrictionsFitchburg City Code § 22-230(1), (7)-(8)
(1)A maximum of one accessory dwelling unit shall be permitted on a lot of record. ... (7)Accessory dwelling units may share existing utility connections with the primary residence if adequate capacity exists and approved by the building inspector. Any new utility work must be properly permitted and inspected.(8)New, separate utility connections shall be subject to typical fees and charges as n...
Shed & Carport Rules
Fitchburg, Wisconsin caps a detached garage, carport or storage building over 400 square feet at the height of the house and no more than 15 feet under City Code § 22-56(6), while smaller sheds, pet houses and runs under § 22-56(7) cannot exceed 400 square feet and must sit at least four feet off the side or rear line.
Fitchburg, WI Shed and Garage Size Limits
Some RestrictionsFitchburg City Code § 22-56(6)-(7)
(6)Detached garages/carports and storage buildings greater than 400 square feet in floor area shall comply with setback standards. They must not be taller than the principal structure, and in no case more than 15 feet in height. Maximum lot coverage rules apply. Such accessory structure(s) shall not be forward of the front face of the principal structure.(7)Storage buildings/sheds/enclosures/pe...
Looking for Dane County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Fitchburg city rules.
Accessory Structures in Dane County →