To find your tax parcel number, start with your annual property tax bill, deed, or closing paperwork; if none of those are handy, search your county assessor’s website by street address or click the property on the county’s GIS map. The number goes by different names in different places, including Assessor’s Parcel Number (APN), Property Identification Number (PIN), or Tax Map Number, but it’s the same thing: a unique code the county assessor uses to tie a specific piece of land to its tax and ownership records.
Check the Documents You Already Have
If you own the property, the fastest source is paperwork already in your files. The annual property tax bill is the most reliable place to look. The parcel number is almost always printed near the top of the bill, close to your name and the property address. It stays the same from year to year unless the land is subdivided or merged with an adjacent lot.
Other documents that carry the number include your deed, the title report from your purchase, and your closing disclosure. On a deed, the parcel number usually sits near or within the legal description. Your mortgage statement or homeowner’s insurance declaration page may reference it as well. Any one of these will do the job. If you have more than one on hand, confirm the number matches across them, because clerical errors and old boundary adjustments occasionally leave discrepancies that are easier to catch now than during a closing or an appeal.
Search the County Assessor’s Website
When you don’t have the documents, or you’re looking up a property you don’t own, go to the county assessor’s website. Nearly every county offers a free online property search. Look for a link labeled “property search,” “parcel lookup,” or “tax records” on the assessor or property appraiser’s homepage.
Searching by street address is usually simplest. Enter the address and the system returns the parcel number along with the owner’s name, assessed value, tax history, and basic characteristics like square footage and lot size. Most portals also let you search by owner name, which helps when you know who owns a property but not its exact address. Some accept partial parcel numbers, useful when you have part of the number from an old document and need to confirm the rest.
For rural land without a conventional street address, or when the address search returns nothing, use the county’s GIS (Geographic Information System) map. Most assessor sites link to an interactive map where you can zoom to a location, click on a parcel, and pull up its number and assessment. GIS maps are especially handy for vacant land, oddly shaped lots, and properties where the mailing address doesn’t match the physical location.
Call or Visit the Assessor’s Office
When the online tools don’t cooperate or the records look unusual, call or visit the county assessor’s office. Staff can look up any parcel by address or owner name, and they’re the definitive source when records conflict. This is also the right move if you suspect the parcel number has changed, because the office keeps the full chain of prior numbers.
Have the property address and the owner’s name ready before you call. If you’re researching a property you don’t own, the owner’s name helps narrow the search but isn’t required. Property tax records are public information, so you’re entitled to look up any parcel regardless of ownership.
For properties that straddle county lines or sit near a boundary, check both counties. Each county assigns its own parcel numbers independently, so the portion in one county will have a different number from the portion in the other.
Getting the Format Right
Parcel numbers look different from county to county. Some run six or seven digits; others stretch to a dozen or more separated by dashes. The exact structure varies, so a number from one county won’t follow the pattern of the next county over.
What matters for a search is that the number matches exactly, including any leading zeros and dashes. County databases are picky about formatting. If a search tool returns no results, double-check that every digit and separator is entered exactly as it appears on your source document.
Condos and Multi-Unit Properties
Condominiums add a wrinkle. A condo complex typically has a master parcel number for the whole property, and each individual unit also has its own tax assessment record. When you search by address, you may see the master parcel first and need to drill down to your specific unit. Some counties append a sequence to the shared parcel number so unit 1 ends in -01, unit 2 in -02, and so on.
Large commercial properties and apartment complexes can span several contiguous tax lots, each with its own parcel number. Don’t assume a single number covers a shopping center or industrial site. The GIS map is the best tool here, because you can see where one parcel ends and the next begins even when they share a single street address.
When the Old Number Doesn’t Match
A parcel number is not permanent the way a street address tends to be. The most common trigger for a change is a subdivision, where one lot is split into two or more new parcels, each with a brand-new number. Consolidation works the other way: when adjacent lots are merged, the old numbers are retired and a new one is assigned. Boundary line adjustments between neighbors can also cause renumbering.
If you’re working from an older document and the number doesn’t match current county records, a subdivision or consolidation is the most likely explanation. The assessor’s office can trace the history and tell you what the old number became. This comes up often in estate settlements and title searches on properties that haven’t changed hands in decades.
Parcel Number vs. Legal Description
People sometimes treat the parcel number and the legal description as interchangeable. They’re not. The legal description defines the property’s physical boundaries using surveyor’s language: metes and bounds, lot-and-block references, or government survey coordinates. It’s the authoritative identifier for deeds, mortgages, and other recorded documents. The parcel number is an administrative label the assessor uses for tax purposes; it points to a spot in the county’s mapping system but doesn’t describe actual boundaries.
Courts have held that a parcel number alone is generally not a sufficient legal description for a deed or deed of trust, because the number doesn’t necessarily correspond to actual physical boundaries. For any document that conveys ownership or creates a lien, you’ll need the full legal description. For everyday tasks like paying taxes, pulling permits, appealing an assessment, or checking a property’s assessed value, the parcel number is what you want.