Will County LUO limits residential lot coverage to 30 to 40% depending on district. Municipal limits range 35% (Frankfort large-lot R-1) to 50% (Romeoville R-4). Countywide Stormwater Ordinance adds impervious-surface triggers for flood-prone Des Plaines, DuPage, and Kankakee River basins.
Will County Land Use Ordinance §8.5 caps building lot coverage at 30% in R-1 Estate, 35% in R-2A, and 40% in R-3/R-4. Municipal codes add both building coverage and impervious-surface limits: Joliet R-2 allows 35% building coverage and 60% total impervious; Bolingbrook R-2 35% building / 55% impervious; Plainfield R-1 30% building / 50% impervious; Frankfort R-1 30% / 50%; Mokena R-2 35% / 60%; Romeoville R-4 40% / 60%; Lockport and New Lenox R-2 35% / 55%. The Will County Stormwater Management Ordinance (adopted 2007, last amended 2023, administered under the Will County Stormwater Management Planning Committee and 70 ILCS 1815) requires detention for any development disturbing more than 0.5 acres or adding more than 5,000 sq ft of impervious area, critical for Des Plaines River, DuPage River, Hickory Creek, and Kankakee River floodplains. Permeable pavers receive 50% credit in most jurisdictions.
Exceeding lot coverage: correction required, $200 to $1,000 fine. May need to remove driveway, patio, or accessory structure. Stormwater ordinance violations: $500 to $10,000/day under 70 ILCS 1815/19.
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 lot coverage limits rules stack up against other locations.
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