Accessory Structures in Green Bay, WI (2026)
2 verified accessory structures rules for Green Bay, Wisconsin, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Green Bay allows one accessory dwelling unit per lot behind the main house, capped at 1,000 square feet, but only with a conditional use permit and owner-occupancy of one unit.
Green Bay ADU Zoning Standards
Significant RestrictionsGreen Bay Municipal Code § 44-1580(f)
Accessory dwelling units are permitted in conjunction with a primary detached single-family dwelling, two-family dwelling (duplex or semi-detached) or single-family attached dwellings (townhouses). They are not permitted in conjunction with multiple-family or mixed-use structures.(2)There shall be no more than one accessory dwelling unit on a parcel/lot...(4)An accessory dwelling unit shall not...
Shed & Carport Rules
A detached shed on a Green Bay one- or two-family lot can be up to 1,000 square feet and 16 feet tall, and must sit at least 25 feet from the front lot line and 3 feet from other structures.
Green Bay Shed Size And Setback Rules
Some RestrictionsGreen Bay Municipal Code § 44-590, Table 44-4
(c)Detached structures. Detached accessory structures shall be permitted in residential districts in accordance with the requirements shown in Table 44-4... Table 44-4: Number of structures allowed 2 (One/Two-Family). Maximum size - 1st structure: 1,000 sq. ft./dwelling unit. Maximum height: 16 feet. Required setbacks: Front yard 25 feet; Side yard 5 feet; Rear yard 4 feet; Between structures 3...
Looking for Brown County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Green Bay city rules.
Accessory Structures in Brown County →