Free tool — no signup required
Enter any U.S. property address and we'll identify its county and send you straight to the official county assessor parcel search — where your Assessor's Parcel Number (APN) is one address search away. Contractors need the APN on almost every permit application; find it before you file.
Search your address above
We use the U.S. Census geocoder to pinpoint the property's county — free and instant.
Open your county assessor link
We give you the official parcel search page for your county (top 50 counties curated by hand).
Enter the address on the assessor site
Your APN / parcel ID appears in the property record. Copy it onto your permit application.
An APN — also called a parcel number, parcel ID, or folio number — is a unique identifier your county assessor assigns to every piece of real property. It usually looks like 1234-567-890 or 12-34-567-890. Building departments use it to tie permits, inspections, and tax records to the right property.
The fastest way is your county assessor's online parcel search: enter the property address and the APN appears in the property record. It's also printed on your property tax bill, and sometimes on your deed. Use the free lookup tool above to jump straight to your county's official search page.
Most building permit applications require the APN to identify the property. Having it ready before you apply avoids rejected applications and delays — one wrong digit can send your permit to the wrong parcel.
Yes. The lookup uses the free U.S. Census geocoder to identify your county, then links you directly to your county assessor's official parcel search. No account, no fees, no limits.
Permit Warden tracks permits, licenses, and renewal deadlines for every property you work on — with automatic reminders before anything expires.
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