Permit guide · Permit Expiration
A building permit does not last forever. Many AHJs set an expiration window, require work to start within a certain period, require inspection activity to keep the permit active, or require a permit extension before the deadline. The right answer depends on the address, project type, approval date, inspection history, and local code.
What this guide checks
Expiration, extensions, inspections, closeout
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.
GPS-verified
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 building permit often lasts for a fixed local window such as 6, 12, or 18 months, but there is no single national rule. Some permits expire if work never starts, some expire after long inactivity between inspections, and some remain active only if the permit holder requests an extension before the deadline. If a permit expires, the AHJ may require a renewal, revised plans, new fees, correction review, or a new inspection path before work continues.
What we check
Start with the issue date, not the application date. Permit expiration rules often count from when the building permit is approved, and the local window can change by AHJ, project type, and whether the permit is residential or commercial.
Some AHJs require construction to begin within a defined period after permit issuance. If nothing happens before that date, the permit may expire even if the project was approved correctly.
A permit may stay active only if inspections keep moving. Long gaps between rough-in, framing, final inspection, or other milestones can create an inactive permit, expired building permit, or reviewer question before work resumes.
A permit extension is usually easier before the expiration date than after it. The AHJ may ask why the project is delayed, whether plans changed, who is doing the work, and whether additional fees or updated documents are required.
If the code changed, the contractor changed, or the project scope drifted, the AHJ may not simply restart the old permit. Revised drawings, new trade permits, zoning checks, or updated engineering can be required.
A permit is not truly finished until the required final inspection, correction approvals, certificate, or closeout record is complete. Open permits can matter during sale, refinancing, insurance review, or future construction.
Process
An expired building permit and an open permit are not always the same thing. An open permit may still be waiting on final inspection or closeout, while an expired permit may require renewal or a new approval path before work continues. The key move is to confirm the current status with the AHJ before assuming the permit protects the project.
Per state
IL
Illinois building permit expiration rules are local. Chicago, suburbs, townships, and counties may use different windows for permit validity, inspection inactivity, extension requests, and final closeout.
WI
Wisconsin projects can involve local permit timing plus state residential code expectations. Check whether the municipality, county, or UDC inspection process controls extension and closeout steps.
IN
Indiana permit duration rules vary by city, county, and local code adoption. The reviewing AHJ may require renewal, updated documents, or inspection review before work restarts on an old permit.
Watch for these
Next permit paths
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For contractors
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Our self-serve subscription plans currently cover sheds and garages. For permit expiration permits and other project types, we work with contractors on a custom contract basis tailored to your volume and service area. Fill out the quote form above and select "Contractor", we'll put together a plan that fits your operation.
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