Accessory Structures in Brookfield, WI (2026)
2 verified accessory structures rules for Brookfield, Wisconsin, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
The City of Brookfield Zoning Code (Title 17) does not authorize accessory dwelling units (ADUs) as a permitted accessory use in its R-1 through R-4 residence districts. The code regulates only "accessory buildings" - garages, sheds, and yard maintenance structures - which cannot contain a separate dwelling unit. On parcels of 12,000 sq ft or less, total accessory building square footage is capped at 600 sq ft (Ch. 17.136). Accessory buildings have a maximum height of 15 ft in R-2 and minimum side and rear yard offsets of 5 feet for detached garages and yard maintenance buildings. Wis. Stat. Sec. 62.23 grants the city its zoning authority.
ADU Rules in Brookfield
Heavy RestrictionsShed Rules
Sheds and other accessory buildings in the City of Brookfield are regulated by Chapter 17 (Zoning), with key residential standards in Section 17.136 (Miscellaneous Use and Design Restrictions). Sheds must be in the rear yard, are limited to 11 feet in height, must sit at least 5 feet from side and rear lot lines, and at least 10 feet from the principal dwelling. Total accessory coverage is capped at 20 percent of the rear yard or 625 square feet, whichever is less, and only one accessory building is allowed by right in residential districts. A building permit is required, and screening from the street and lot lines is required.
Brookfield Shed Rules (Code Ch. 17 Zoning, Sec. 17.136)
Some RestrictionsLooking for Waukesha County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Brookfield city rules.
Accessory Structures in Waukesha County →