ADU rules in Joliet, IL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Joliet regulates accessory structures through the zoning ordinance. Illinois HB 2373 (effective 2024) encourages ADU development statewide and limits municipal restrictions in certain contexts. ADUs must comply with all building code, zoning setback, and lot coverage requirements.
Joliet's zoning ordinance governs accessory structures including potential accessory dwelling units. Illinois passed HB 2373 effective in 2024, which encourages ADU development and limits some municipal restrictions on ADUs. ADUs in Joliet must comply with the International Building Code and International Residential Code as adopted under Section 8-175, including habitable space requirements for plumbing, electrical, heating, and egress. Building permits are required for any ADU construction or conversion. Setback requirements, lot coverage limits, and parking requirements from the zoning ordinance apply. Garage conversions to living space must meet all habitable space standards.
Building without a permit subject to fines up to $750 per offense. Unpermitted structures may be ordered demolished or brought into compliance.
Joliet, IL
Joliet prohibits dog owners from permitting their dog to bark, growl, howl, or whine in a loud manner disturbing others under Section 6-29, but only after th...
Joliet, IL
Joliet regulates industrial noise through its general noise nuisance ordinance (Section 21-7), the Illinois Environmental Protection Act (415 ILCS 5), and th...
Joliet, IL
Joliet prohibits loud, unnecessary, or unusual noise that disturbs the comfort, repose, health, peace, or safety of others under Section 21-7. The city does ...
Joliet, IL
The City of Joliet has developed an Electric Vehicle Charging Infrastructure Plan to support growing EV adoption. Level 3 fast chargers are planned within on...
Joliet, IL
Joliet does not have a blanket overnight parking ban but enforces a 48-hour limit on all street parking under Section 19-138. During snowfall of 2 inches or ...
Joliet, IL
Joliet regulates fence heights through the zoning ordinance. Corner lot side yards require a 20-foot setback, and fences over 4 feet in the corner side yard ...
Side-by-side rule comparisons with other cities in Will County.
See how other cities in Will County handle adu rules.
See how Joliet's adu rules rules stack up against other locations.
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