Illinois Zoning & Land Use Guide
Last updated: Verified:
Comprehensive guide to Illinois zoning laws, building codes, and land use regulations.
Key Facts
- Building Code: No statewide building code for non-state buildings; local adoption
- State ADU Law: Varies by city
- ADU Details: Illinois has no statewide ADU mandate. Accessory dwelling unit regulations are set by individual municipalities and counties, with significant variation across the state.
Official Sources
Cities in Illinois
Arlington Heights
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ADU: Restricted
Aurora
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ADU: Restricted
Bloomington
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ADU: Restricted
Bolingbrook
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ADU: Restricted
Champaign
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ADU: Restricted
Chicago
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ADU: Restricted
Cicero
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ADU: Restricted
Decatur
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ADU: Restricted
Des Plaines
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ADU: Restricted
Elgin
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ADU: Restricted
Evanston
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ADU: Restricted
Joliet
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ADU: Restricted
Naperville
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ADU: Restricted
Palatine
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ADU: Restricted
Peoria
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ADU: Restricted
Rockford
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ADU: Restricted
Schaumburg
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ADU: Restricted
Skokie
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ADU: Restricted
Springfield
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ADU: Restricted
Waukegan
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ADU: Restricted
Disclaimer: The information on this website is provided for general informational purposes only and does not constitute legal, financial, or professional advice. Always verify current requirements with your local planning department.