ADU rules in Will County, IL — also called accessory dwelling unit regulations or granny flat ordinances — cover setbacks, owner-occupancy, parking, and permit requirements.
Will County's zoning code (Chapter 155) does not broadly permit accessory dwelling units by right in all residential districts. ADU allowances vary by zoning district. Illinois HB 2373 (2024) encourages ADU development statewide but does not mandate local adoption. Contact the Will County Land Use Department for ADU feasibility in your zoning district.
Illinois passed HB 2373 (effective 2024) to encourage ADU development by limiting certain municipal restrictions. Will County regulates accessory dwelling units through local zoning. Home rule cities may implement ADU rules differently than non-home rule cities. Common conditions include maximum size (typically 600 to 800 sq ft), setback requirements, and owner-occupancy provisions. Additional parking may be needed. Building permits required for any habitable structure. HOAs may impose additional restrictions on ADUs.
Unpermitted ADU: building code enforcement. May require demolition or legalization. Occupying unpermitted dwelling: code violation.
Will County, IL
Barking dogs in unincorporated Will County fall under the general noise ordinance (§133.04) if audible 75 feet beyond the property line during quiet hours (1...
Will County, IL
Will County §133.04 prohibits noise in all residential districts (and adjacent business districts) in unincorporated areas between 10:00 PM and 7:00 AM. Nois...
Will County, IL
Will County §133.04 defines construction trades as home repair including construction, repair, and maintenance of structures and appurtenances, plus landscap...
Will County, IL
Will County §155-11.65 regulates truck and trailer parking in A-2 and residential districts. Commercial vehicles must be screened from view in side/rear yard...
Will County, IL
Unincorporated Will County does not have a county-wide overnight street parking ban. Parking on county roads is governed by the Illinois Vehicle Code (625 IL...
Will County, IL
In unincorporated Will County, vehicles must be parked on approved parking surfaces in residential districts. The zoning code (Chapter 155) governs driveway ...
See how Will County's adu rules rules stack up against other locations.
Help us keep this page accurate. If you notice an error or outdated information, let us know.