An APN in real estate is the assessor’s parcel number assigned to a plot of land. County tax assessors assign the APN using formatting codes based on the locations of specific properties.
Local governments use APNs to keep track of land ownership for tax purposes. Deeds are documents used to transfer ownership of land and other legal claims to real estate. The APN legally identifies any property associated with a real estate transaction. Most property owners can find their APN next to their name and address on their property tax bill. A deed of trust lists the APN along with appraisals and title reports.