Missouri (MO) Building Permit & Cost Directory
Explore municipal permit requirements, Bureau of Labor Statistics (BLS) contractor wages, and real-time residential cost calculators across all 115 counties in Missouri for 2026.
Missouri Residential Building Code & Licensing Overview
Statewide compliance standards and contractor mandates
Residential home renovations in Missouri 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 MO
Type your county or city name below to instantly isolate local building departments and cost calculators.
All Missouri Counties (115)
Click any county below to calculate local permit costs, view inspector notes, and check trade wages.
Adair County
Est. Permit: $140 • BLS $29.89/hr
Andrew County
Est. Permit: $140 • BLS $29.89/hr
Atchison County
Est. Permit: $140 • BLS $29.89/hr
Audrain County
Est. Permit: $140 • BLS $29.89/hr
Barry County
Est. Permit: $140 • BLS $29.89/hr
Barton County
Est. Permit: $140 • BLS $29.89/hr
Bates County
Est. Permit: $140 • BLS $29.89/hr
Benton County
Est. Permit: $140 • BLS $29.89/hr
Bollinger County
Est. Permit: $140 • BLS $29.89/hr
Boone County
Est. Permit: $140 • BLS $29.89/hr
Buchanan County
Est. Permit: $140 • BLS $29.89/hr
Butler County
Est. Permit: $140 • BLS $29.89/hr
Caldwell County
Est. Permit: $140 • BLS $29.89/hr
Callaway County
Est. Permit: $140 • BLS $29.89/hr
Camden County
Est. Permit: $140 • BLS $29.89/hr
Cape Girardeau County
Est. Permit: $140 • BLS $29.89/hr
Carroll County
Est. Permit: $140 • BLS $29.89/hr
Carter County
Est. Permit: $140 • BLS $29.89/hr
Cass County
Est. Permit: $140 • BLS $29.89/hr
Cedar County
Est. Permit: $140 • BLS $29.89/hr
Chariton County
Est. Permit: $140 • BLS $29.89/hr
Christian County
Est. Permit: $140 • BLS $29.89/hr
Clark County
Est. Permit: $140 • BLS $29.89/hr
Clay County
Est. Permit: $140 • BLS $29.89/hr
Clinton County
Est. Permit: $140 • BLS $29.89/hr
Cole County
Est. Permit: $140 • BLS $29.89/hr
Cooper County
Est. Permit: $140 • BLS $29.89/hr
Crawford County
Est. Permit: $140 • BLS $29.89/hr
Dade County
Est. Permit: $140 • BLS $29.89/hr
Dallas County
Est. Permit: $140 • BLS $29.89/hr
Daviess County
Est. Permit: $140 • BLS $29.89/hr
Dekalb County
Est. Permit: $140 • BLS $29.89/hr
Dent County
Est. Permit: $140 • BLS $29.89/hr
Douglas County
Est. Permit: $140 • BLS $29.89/hr
Dunklin County
Est. Permit: $140 • BLS $29.89/hr
Franklin County
Est. Permit: $140 • BLS $29.89/hr
Gasconade County
Est. Permit: $140 • BLS $29.89/hr
Gentry County
Est. Permit: $140 • BLS $29.89/hr
Greene County
Est. Permit: $140 • BLS $29.89/hr
Grundy County
Est. Permit: $140 • BLS $29.89/hr
Harrison County
Est. Permit: $140 • BLS $29.89/hr
Henry County
Est. Permit: $140 • BLS $29.89/hr
Hickory County
Est. Permit: $140 • BLS $29.89/hr
Holt County
Est. Permit: $140 • BLS $29.89/hr
Howard County
Est. Permit: $140 • BLS $29.89/hr
Howell County
Est. Permit: $140 • BLS $29.89/hr
Iron County
Est. Permit: $140 • BLS $29.89/hr
Jackson County
Est. Permit: $140 • BLS $29.89/hr
Jasper County
Est. Permit: $140 • BLS $29.89/hr
Jefferson County
Est. Permit: $140 • BLS $29.89/hr
Johnson County
Est. Permit: $140 • BLS $29.89/hr
Knox County
Est. Permit: $140 • BLS $29.89/hr
Laclede County
Est. Permit: $140 • BLS $29.89/hr
Lafayette County
Est. Permit: $140 • BLS $29.89/hr
Lawrence County
Est. Permit: $140 • BLS $29.89/hr
Lewis County
Est. Permit: $140 • BLS $29.89/hr
Lincoln County
Est. Permit: $140 • BLS $29.89/hr
Linn County
Est. Permit: $140 • BLS $29.89/hr
Livingston County
Est. Permit: $140 • BLS $29.89/hr
Macon County
Est. Permit: $140 • BLS $29.89/hr
Madison County
Est. Permit: $140 • BLS $29.89/hr
Maries County
Est. Permit: $140 • BLS $29.89/hr
Marion County
Est. Permit: $140 • BLS $29.89/hr
Mcdonald County
Est. Permit: $140 • BLS $29.89/hr
Mercer County
Est. Permit: $140 • BLS $29.89/hr
Miller County
Est. Permit: $140 • BLS $29.89/hr
Mississippi County
Est. Permit: $140 • BLS $29.89/hr
Moniteau County
Est. Permit: $140 • BLS $29.89/hr
Monroe County
Est. Permit: $140 • BLS $29.89/hr
Montgomery County
Est. Permit: $140 • BLS $29.89/hr
Morgan County
Est. Permit: $140 • BLS $29.89/hr
New Madrid County
Est. Permit: $140 • BLS $29.89/hr
Newton County
Est. Permit: $140 • BLS $29.89/hr
Nodaway County
Est. Permit: $140 • BLS $29.89/hr
Oregon County
Est. Permit: $140 • BLS $29.89/hr
Osage County
Est. Permit: $140 • BLS $29.89/hr
Ozark County
Est. Permit: $140 • BLS $29.89/hr
Pemiscot County
Est. Permit: $140 • BLS $29.89/hr
Perry County
Est. Permit: $140 • BLS $29.89/hr
Pettis County
Est. Permit: $140 • BLS $29.89/hr
Phelps County
Est. Permit: $140 • BLS $29.89/hr
Pike County
Est. Permit: $140 • BLS $29.89/hr
Platte County
Est. Permit: $140 • BLS $29.89/hr
Polk County
Est. Permit: $140 • BLS $29.89/hr
Pulaski County
Est. Permit: $140 • BLS $29.89/hr
Putnam County
Est. Permit: $140 • BLS $29.89/hr
Ralls County
Est. Permit: $140 • BLS $29.89/hr
Randolph County
Est. Permit: $140 • BLS $29.89/hr
Ray County
Est. Permit: $140 • BLS $29.89/hr
Reynolds County
Est. Permit: $140 • BLS $29.89/hr
Ripley County
Est. Permit: $140 • BLS $29.89/hr
Saint Charles County
Est. Permit: $140 • BLS $29.89/hr
Saint Clair County
Est. Permit: $140 • BLS $29.89/hr
Saint Francois County
Est. Permit: $140 • BLS $29.89/hr
Saint Louis City
Est. Permit: $140 • BLS $29.89/hr
Saint Louis County
Est. Permit: $140 • BLS $29.89/hr
Sainte Genevieve County
Est. Permit: $140 • BLS $29.89/hr
Saline County
Est. Permit: $140 • BLS $29.89/hr
Schuyler County
Est. Permit: $140 • BLS $29.89/hr
Scotland County
Est. Permit: $140 • BLS $29.89/hr
Scott County
Est. Permit: $140 • BLS $29.89/hr
Shannon County
Est. Permit: $140 • BLS $29.89/hr
Shelby County
Est. Permit: $140 • BLS $29.89/hr
Stoddard County
Est. Permit: $140 • BLS $29.89/hr
Stone County
Est. Permit: $140 • BLS $29.89/hr
Sullivan County
Est. Permit: $140 • BLS $29.89/hr
Taney County
Est. Permit: $140 • BLS $29.89/hr
Texas County
Est. Permit: $140 • BLS $29.89/hr
Vernon County
Est. Permit: $140 • BLS $29.89/hr
Warren County
Est. Permit: $140 • BLS $29.89/hr
Washington County
Est. Permit: $140 • BLS $29.89/hr
Wayne County
Est. Permit: $140 • BLS $29.89/hr
Webster County
Est. Permit: $140 • BLS $29.89/hr
Worth County
Est. Permit: $140 • BLS $29.89/hr
Wright County
Est. Permit: $140 • BLS $29.89/hr
Frequently Asked Questions: Missouri Building Permits
How much does a building permit typically cost in Missouri?
Across Missouri, the baseline residential permit filing fee averages $140.15. 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 Missouri?
Yes. In virtually all Missouri 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 Missouri?
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 Missouri is approximately $29.89/hr, varying based on metropolitan vs rural location.