Permit guide · Roofing
Often yes. Many AHJs require a roofing permit or roof replacement permit when a project replaces shingles, changes roofing material, adds a roof-over, alters decking, changes flashing, or affects ventilation. Local rules control the exact path, including contractor licensing, material standards, inspections, and whether small repairs are exempt.
What this guide checks
Layer limits, underlayment, licensing, inspection notes
Enter your address to find your building department, then answer a few questions to see if you likely need a permit.
What's an AHJ?
The specific city, village, or county office that issues permits. Their boundaries don't always match your mailing address.
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We cross-check your coordinates against municipal boundary polygons, not just ZIP codes.
Wrong AHJ = weeks lost
Filing with the wrong building department means your application sits unreviewed.
The short answer
A full roof replacement usually requires a roofing permit, and a roof-over often needs review because AHJs check layer limits, roof deck condition, underlayment, ice barrier, flashing, ventilation, material standards, contractor licensing, and inspection timing. Small repairs may be exempt in some places, but the threshold changes by jurisdiction and project scope.
What we check
Reviewers need to know whether the project is a full tear-off, roof-over, partial repair, decking replacement, material change, storm repair, or part of a larger structural project. A roof permit may be simple, but the scope still controls the review path.
Many residential codes limit asphalt shingle roof-overs to two total layers, while some AHJs require full tear-off sooner. Tile, slate, metal, and heavier materials can trigger stricter layer, deck, and structural checks.
Midwest AHJs commonly check ice barrier at eaves, underlayment over the roof deck, drip edge, valleys, and manufacturer installation instructions. The exact ice barrier distance, material, and exception rules depend on the adopted code and local amendments.
Shingles must meet ASTM D3462 (composition), and wind resistance standards (ASTM D3161 or D7158). Most AHJs require Class A fire rating. Impact-rated shingles (Class 4) may qualify for insurance discounts.
Reviewers may check attic ventilation, intake and exhaust balance, ridge or box vent placement, soffit conditions, and whether roof work creates moisture, condensation, or premature shingle failure risk.
Roofing permits can include flashing at wall intersections, valleys, chimneys, plumbing vents, skylights, and roof-wall terminations. Some AHJs inspect kick-out flashing, cricket/saddle details, and roof penetrations before closeout.
The AHJ may require a licensed or registered roofing contractor, proof of insurance, bond information, product documentation, permit card posting, progress inspection, or final inspection. Illinois also has statewide roofing contractor licensing rules.
Process
Roof work can look like a simple replacement, but permit reviewers are often protecting the next owner, the insurer, and the structure. Layer limits, deck condition, underlayment, ice barrier, flashing, ventilation, and contractor licensing are the details that turn a quick roof job into an AHJ-controlled approval.
Per state
IL
Illinois roofing projects can involve local permits plus statewide roofing contractor licensing. AHJs may ask for license details, insurance, scope, material information, ice barrier, and inspection closeout.
WI
Wisconsin roofing work may involve local permits, UDC-aware residential expectations, contractor registration, snow-load considerations, underlayment, ice barrier, and inspection sequencing.
IN
Indiana requirements vary by city and county. Local AHJs may require roof permits, contractor registration, ice barrier checks, material documentation, and inspection before permit closeout.
Watch for these
Next permit paths
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For contractors
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