Do building permits expire?

Updated October 2, 2026 · 3 min read

Short answer

Yes. Under the model building codes most US cities adopt, a permit becomes invalid if work does not start within 180 days of issue, or if work stops for 180 days. Cities often change these periods. An expired permit is not a closed permit: it means the work was never signed off.

Why permits expire

A permit is permission to do specific work under the code in force when it was issued. Time limits stop permits from sitting open for years while codes change. Many departments will extend a permit if you ask before it runs out.

What an expired permit tells a buyer

One of two things happened. Either the work was never done, or it was done and nobody called for the final inspection. The record alone does not tell you which. Look at the house, and ask the seller.

What to do about one

1Ask the building department whether the permit can be renewed or needs a new application.
2If the work was done, arrange the final inspection under the renewed permit.
3If the work was never done, ask the department to cancel or void the permit so the record is clear.

Common questions

Is an expired permit the same as a closed permit?

No. Closed means the work passed its final inspection. Expired means time ran out before that happened.

Can an expired permit be reopened?

Often. Many departments renew or reinstate an expired permit for a fee. If codes have changed since it was issued, the work may need to meet the current code.

How long is a building permit good for?

It varies by city. A common rule is that work must start within 180 days and must not stop for more than 180 days. Some cities also set an overall limit of one or two years. Check with the department that issued it.