Accessory Structures in Waukegan, IL (2026)
4 verified accessory structures rules for Waukegan, Illinois, sourced directly from the municipal code and official government pages.
Verified from official government sources
ADU Rules
Waukegan's 2024 Unified Development Ordinance governs accessory dwelling units. Illinois HB 2373 (2024) encourages ADU development statewide. Contact Planning & Zoning for specific ADU requirements.
Waukegan ADU Rules & Accessory Dwelling Unit Regulations
Some RestrictionsShed Rules
Building permits required for all sheds in Waukegan. Sheds under 200 sq ft do not require a foundation or professional design. Sheds 200-600 sq ft need detailed plans and a foundation per the 2021 IRC.
Waukegan Shed Rules & Outbuilding Regulations
Some RestrictionsGarage Conversions
Garage conversions in Waukegan require building permits and zoning compliance. Converted spaces must meet habitable space building code requirements. Required parking spaces must be maintained.
Waukegan Garage Conversion Rules & Requirements
Some RestrictionsCarport Rules
Waukegan requires a building permit for every carport, garage, shed, gazebo, and similar accessory structure (including replacements). Detached carports are governed by Section 9.03 (Accessory Structures) of the Unified Development Ordinance adopted July 1, 2024, must sit behind the principal dwelling's rear building line, may not exceed the principal building's height, and may not occupy more than 40 percent of the required yard.
Carport Rules in Waukegan
Some RestrictionsLooking for Lake County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Waukegan city rules.
Accessory Structures in Lake County →