Garage conversion rules in Cook County, IL — sometimes called garage-to-ADU or accessory living unit conversions — govern permits, ceiling height, egress, and parking replacement.
Converting a garage to living space in unincorporated Cook County requires a building permit and zoning compliance. The conversion must meet the 2009 International Residential Code for habitable space. Off-street parking requirements must still be satisfied.
Garage conversions in unincorporated Cook County require a building permit from the Department of Building and Zoning. The converted space must meet the 2009 International Residential Code standards for habitable rooms, including minimum ceiling height, egress windows, ventilation, insulation, and electrical requirements. The Cook County Zoning Ordinance requires minimum off-street parking for residential properties, so converting a garage may require alternative parking solutions. Electrical work must comply with the 2014 Cook County Electrical Code. Plumbing additions must comply with the 2014 State of Illinois Plumbing Code. The conversion must not reduce lot coverage compliance or violate setback requirements. Inspections are required at various stages of conversion.
Unpermitted conversion: building violation, $100–$1,000 fine. Must bring into compliance or restore garage. 30 days to comply.
Cook County, IL
Chicago Fair Workweek Ordinance covers fast food and other large employers within Chicago city limits only. Cook County has not extended predictable scheduli...
Cook County, IL
Illinois has not enacted a healthcare worker minimum wage equivalent to California SB 525. Cook County has no industry-specific healthcare wage ordinance. He...
Cook County, IL
Cook County has not adopted a grocery worker premium wage ordinance like Los Angeles GWRO. Illinois state law sets a $15 statewide minimum wage as of January...
Cook County, IL
Illinois has no statewide utensils-on-request statute. Cook County has not adopted countywide rules. Some Cook suburbs including Evanston restrict automatic ...
Cook County, IL
Illinois Eavesdropping Act 720 ILCS 5/14 makes it a felony to record private conversations without consent of all parties. Doorbell cameras with audio captur...
Cook County, IL
Illinois Lead Poisoning Prevention Act 410 ILCS 45 and Cook County Department of Public Health Childhood Lead Program require lead inspections in pre-1978 re...
See how Cook County's garage conversions rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.