Illinois (IL) Building Permit & Cost Directory
Explore municipal permit requirements, Bureau of Labor Statistics (BLS) contractor wages, and real-time residential cost calculators across all 102 counties in Illinois for 2026.
Illinois Residential Building Code & Licensing Overview
Statewide compliance standards and contractor mandates
Residential home renovations in Illinois are regulated under the state building code adapted from the International Residential Code (IRC). Permits are mandated for all structural repairs, complete roof replacements exceeding 100-200 square feet, HVAC compressor and furnace retrofits, and electrical service upgrades.
General contractors and trade specialists must carry valid state licenses and verified worker's compensation coverage.
Homeowners may pull permits on their primary dwelling, assuming full civil liability for code compliance and passing inspections.
Find Your County in IL
Type your county or city name below to instantly isolate local building departments and cost calculators.
All Illinois Counties (102)
Click any county below to calculate local permit costs, view inspector notes, and check trade wages.
Adams County
Est. Permit: $168 • BLS $35.87/hr
Alexander County
Est. Permit: $168 • BLS $35.87/hr
Bond County
Est. Permit: $168 • BLS $35.87/hr
Boone County
Est. Permit: $168 • BLS $35.87/hr
Brown County
Est. Permit: $168 • BLS $35.87/hr
Bureau County
Est. Permit: $168 • BLS $35.87/hr
Calhoun County
Est. Permit: $168 • BLS $35.87/hr
Carroll County
Est. Permit: $168 • BLS $35.87/hr
Cass County
Est. Permit: $168 • BLS $35.87/hr
Champaign County
Est. Permit: $168 • BLS $35.87/hr
Christian County
Est. Permit: $168 • BLS $35.87/hr
Clark County
Est. Permit: $168 • BLS $35.87/hr
Clay County
Est. Permit: $168 • BLS $35.87/hr
Clinton County
Est. Permit: $168 • BLS $35.87/hr
Coles County
Est. Permit: $168 • BLS $35.87/hr
Cook County
Est. Permit: $168 • BLS $35.87/hr
Crawford County
Est. Permit: $168 • BLS $35.87/hr
Cumberland County
Est. Permit: $168 • BLS $35.87/hr
De Kalb County
Est. Permit: $168 • BLS $35.87/hr
Dewitt County
Est. Permit: $168 • BLS $35.87/hr
Douglas County
Est. Permit: $168 • BLS $35.87/hr
Du Page County
Est. Permit: $168 • BLS $35.87/hr
Edgar County
Est. Permit: $168 • BLS $35.87/hr
Edwards County
Est. Permit: $168 • BLS $35.87/hr
Effingham County
Est. Permit: $168 • BLS $35.87/hr
Fayette County
Est. Permit: $168 • BLS $35.87/hr
Ford County
Est. Permit: $168 • BLS $35.87/hr
Franklin County
Est. Permit: $168 • BLS $35.87/hr
Fulton County
Est. Permit: $168 • BLS $35.87/hr
Gallatin County
Est. Permit: $168 • BLS $35.87/hr
Greene County
Est. Permit: $168 • BLS $35.87/hr
Grundy County
Est. Permit: $168 • BLS $35.87/hr
Hamilton County
Est. Permit: $168 • BLS $35.87/hr
Hancock County
Est. Permit: $168 • BLS $35.87/hr
Hardin County
Est. Permit: $168 • BLS $35.87/hr
Henderson County
Est. Permit: $168 • BLS $35.87/hr
Henry County
Est. Permit: $168 • BLS $35.87/hr
Iroquois County
Est. Permit: $168 • BLS $35.87/hr
Jackson County
Est. Permit: $168 • BLS $35.87/hr
Jasper County
Est. Permit: $168 • BLS $35.87/hr
Jefferson County
Est. Permit: $168 • BLS $35.87/hr
Jersey County
Est. Permit: $168 • BLS $35.87/hr
Jo Daviess County
Est. Permit: $168 • BLS $35.87/hr
Johnson County
Est. Permit: $168 • BLS $35.87/hr
Kane County
Est. Permit: $168 • BLS $35.87/hr
Kankakee County
Est. Permit: $168 • BLS $35.87/hr
Kendall County
Est. Permit: $168 • BLS $35.87/hr
Knox County
Est. Permit: $168 • BLS $35.87/hr
La Salle County
Est. Permit: $168 • BLS $35.87/hr
Lake County
Est. Permit: $168 • BLS $35.87/hr
Lawrence County
Est. Permit: $168 • BLS $35.87/hr
Lee County
Est. Permit: $168 • BLS $35.87/hr
Livingston County
Est. Permit: $168 • BLS $35.87/hr
Logan County
Est. Permit: $168 • BLS $35.87/hr
Macon County
Est. Permit: $168 • BLS $35.87/hr
Macoupin County
Est. Permit: $168 • BLS $35.87/hr
Madison County
Est. Permit: $168 • BLS $35.87/hr
Marion County
Est. Permit: $168 • BLS $35.87/hr
Marshall County
Est. Permit: $168 • BLS $35.87/hr
Mason County
Est. Permit: $168 • BLS $35.87/hr
Massac County
Est. Permit: $168 • BLS $35.87/hr
Mcdonough County
Est. Permit: $168 • BLS $35.87/hr
Mchenry County
Est. Permit: $168 • BLS $35.87/hr
Mclean County
Est. Permit: $168 • BLS $35.87/hr
Menard County
Est. Permit: $168 • BLS $35.87/hr
Mercer County
Est. Permit: $168 • BLS $35.87/hr
Monroe County
Est. Permit: $168 • BLS $35.87/hr
Montgomery County
Est. Permit: $168 • BLS $35.87/hr
Morgan County
Est. Permit: $168 • BLS $35.87/hr
Moultrie County
Est. Permit: $168 • BLS $35.87/hr
Ogle County
Est. Permit: $168 • BLS $35.87/hr
Peoria County
Est. Permit: $168 • BLS $35.87/hr
Perry County
Est. Permit: $168 • BLS $35.87/hr
Piatt County
Est. Permit: $168 • BLS $35.87/hr
Pike County
Est. Permit: $168 • BLS $35.87/hr
Pope County
Est. Permit: $168 • BLS $35.87/hr
Pulaski County
Est. Permit: $168 • BLS $35.87/hr
Putnam County
Est. Permit: $168 • BLS $35.87/hr
Randolph County
Est. Permit: $168 • BLS $35.87/hr
Richland County
Est. Permit: $168 • BLS $35.87/hr
Rock Island County
Est. Permit: $168 • BLS $35.87/hr
Saint Clair County
Est. Permit: $168 • BLS $35.87/hr
Saline County
Est. Permit: $168 • BLS $35.87/hr
Sangamon County
Est. Permit: $168 • BLS $35.87/hr
Schuyler County
Est. Permit: $168 • BLS $35.87/hr
Scott County
Est. Permit: $168 • BLS $35.87/hr
Shelby County
Est. Permit: $168 • BLS $35.87/hr
Stark County
Est. Permit: $168 • BLS $35.87/hr
Stephenson County
Est. Permit: $168 • BLS $35.87/hr
Tazewell County
Est. Permit: $168 • BLS $35.87/hr
Union County
Est. Permit: $168 • BLS $35.87/hr
Vermilion County
Est. Permit: $168 • BLS $35.87/hr
Wabash County
Est. Permit: $168 • BLS $35.87/hr
Warren County
Est. Permit: $168 • BLS $35.87/hr
Washington County
Est. Permit: $168 • BLS $35.87/hr
Wayne County
Est. Permit: $168 • BLS $35.87/hr
White County
Est. Permit: $168 • BLS $35.87/hr
Whiteside County
Est. Permit: $168 • BLS $35.87/hr
Will County
Est. Permit: $168 • BLS $35.87/hr
Williamson County
Est. Permit: $168 • BLS $35.87/hr
Winnebago County
Est. Permit: $168 • BLS $35.87/hr
Woodford County
Est. Permit: $168 • BLS $35.87/hr
Frequently Asked Questions: Illinois Building Permits
How much does a building permit typically cost in Illinois?
Across Illinois, the baseline residential permit filing fee averages $168.19. Total permit costs are calculated based on valuation formulas (typically $5 to $15 per $1,000 of project value) plus electrical, mechanical, and plan review inspection surcharges.
Do I need a building permit for roof replacement in Illinois?
Yes. In virtually all Illinois county jurisdictions, roof replacements involving more than 100 square feet (1 roofing square) or involving any structural decking, rafter, or truss repair require a formal building permit and at least one in-progress or final roof inspection.
What is the average trade wage for contractors in Illinois?
According to the latest Bureau of Labor Statistics (BLS) Occupational Employment and Wage Statistics (OEWS), the median hourly rate for licensed residential construction trades in Illinois is approximately $35.87/hr, varying based on metropolitan vs rural location.