Permit guide · Permit Expiration
How Long Does a Building Permit Last?
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.
This guide covers
- Expiration
- Extensions
- Inspections
- Closeout
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 to check before assuming a building permit is still active
Approval Date and Expiration Window
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.
Start-Work Deadline
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.
Inspection Activity
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.
Permit Extension Request
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.
Code, Scope, and Plan Changes
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.
Closeout and Final Records
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.
Expired Permit vs. Open Permit
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.
State-specific notes
Illinois
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.
Explore Illinois permit rulesWisconsin
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.
Explore Wisconsin permit rulesIndiana
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.
Explore Indiana permit rules
Common permit expiration permit mistakes
- Assuming every building permit lasts one year without checking the AHJ rule
- Waiting until after expiration to ask for a permit extension
- Restarting work on an expired building permit without confirming status
- Skipping final inspection because the physical work looks complete
- Forgetting that plan, contractor, or code changes can reopen review
Start with a free permit check
Enter the address and project so Permitech can identify the permit office, check property context, and research official local sources. Review what we find before deciding whether you want help organizing or filing the permit.
What the free check does
- Step 1: Resolve the propertyMatch the address to its parcel, zoning context, and responsible permit authority.
- Step 2: Research the projectCheck permit expiration requirements against official local sources.
- Step 3: Review the resultSee the permit path first, then decide whether you want help organizing the package or filing it.
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For contractors
Contractors: Reduce Surprise Expiration and Closeout Delays
Use Permitech to check permit status, extension rules, inspection milestones, and closeout requirements before scheduling crews or promising a restart date.
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