Start with your county assessor or tax assessor's office
Your county assessor maintains the official record of your property's assessed value, which is the foundation of your property tax bill. This office exists in every county in the United States and keeps files on every parcel of land within its jurisdiction. You can visit in person, call, or search online — most counties now have searchable databases on their websites where you can look up your address and see the assessed value, property description, and sometimes the tax history.
The assessor's office is not the same as the tax collector's office, though they work together. The assessor determines what your property is worth; the tax collector bills you based on that value. If you need the assessed value or want to understand how it was calculated, the assessor is your first stop. Many offices have staff who can walk you through what the numbers mean and why your property was valued the way it was.
To find your county assessor, search "[your county name] assessor" or "[your county name] property appraiser" — the title varies by state. Once you find the office, look for a link labeled "property search," "parcel lookup," or "GIS map." Type in your address and the system will return your parcel number, assessed value, and often a property record card showing lot size, building square footage, and recent sales data.
Key Takeaways
- Your county assessor's office maintains the official assessed value of your property and usually offers a free online search tool on their website.
- Your property tax bill comes from the tax collector or county treasurer, who uses the assessor's value to calculate what you owe.
- The property record card from the assessor shows the details used to calculate your assessed value, including lot size, building features, and comparable sales.
- If you disagree with your assessed value, the assessor's office can explain the methodology and direct you to the formal appeal process in your county.
Check your property tax bill or notice of assessment
Your property tax bill or notice of assessment is a document you receive annually (or sometimes twice per year, depending on your state and county). It shows your assessed value, the tax rate applied to it, and the total amount due. This bill is mailed by the tax collector, county treasurer, or sometimes a third-party billing agent, and it is the most direct source of information about what you owe.
The bill itself contains several pieces of information: your parcel number (which you can use to look up more details online), the assessed value, the millage rate or tax rate, any exemptions you receive, and the due date. Some bills also show the previous year's value so you can see if your assessment changed. If you have lost your bill or need a copy, contact your county tax collector's office and request a duplicate.
The notice of assessment is slightly different — it is issued by the assessor to notify you of a change in your property's value, usually before the tax bill is sent. If you receive one showing a value increase, this is your signal that your tax bill will likely be higher next year. The notice typically includes information on how to file a formal objection if you believe the new value is incorrect.
Use your county's online property search or GIS mapping tool
Most counties maintain a free online database where you can search by address, parcel number, or owner name. These systems are often called the assessor's GIS (Geographic Information System) map, property appraiser database, or straightforward the property search tool. The interface varies widely — some are straightforward and fast, others require you to navigate a map — but they all return the same core information: assessed value, property description, and tax history.
Once you pull up your property, you will see a property record card or assessment detail sheet. This shows the land value, building value, and any improvements (like a garage or pool) that were factored into the assessment. Some systems also display recent sales of comparable properties in your area, which can help you understand whether your assessment is in line with market value. A few counties even show the actual property tax bill online, updated in real time.
If the online tool is confusing or you cannot find your property, call the assessor's office directly. Staff can walk you through the search or email you a property record card. Having your street address and zip code is usually enough; if you have your parcel number, the search will be faster.
Request records directly from the tax collector or county treasurer
The tax collector (or county treasurer, depending on your state) is responsible for billing and collecting property taxes. This office maintains records of what you have paid, when you paid it, and whether you are current on your account. If you need a history of your tax payments, a current bill, or proof that you have paid in full, this is the office to contact.
You can request records by phone, email, or in person. Many tax collector offices now allow you to set up an online account where you can view your bill, make payments, and see your payment history without calling. To find your tax collector, search "[your county name] tax collector" or "[your county name] county treasurer." Once you have the contact information, ask for a tax payment history or a current bill. Some offices charge a small fee for certified copies, but basic information is usually free.
If you are behind on payments or have questions about a bill, the tax collector's office can also explain payment plans, penalty and interest charges, and what happens if you do not pay. This is also where you would go if you believe there is an error in your bill — though the assessor handles disputes about the assessed value itself.
Look up deed records and ownership history at the county recorder or clerk
The county recorder (or county clerk, depending on your state) maintains deed records and ownership history for all properties in the county. A deed is the legal document that transfers ownership of property from one person to another. If you want to see who owned your property before you did, when they bought it, or what they paid for it, the recorder's office has that information.
Deed records are public and free to search in most counties. You can visit the recorder's office in person or search online through the county website. Some counties have digitized their entire deed archive and made it searchable by address or owner name; others require you to know the parcel number or the date of the transaction. If you are having trouble finding a deed, the recorder's staff can help you navigate the system or pull a copy for a small fee.
Deed information is useful if you are trying to understand your property's history, verify ownership, or check for liens or encumbrances (legal claims against the property). It is separate from the assessed value and tax information, but it is part of the complete picture of your property's legal and financial status.
Understand what each document tells you and what it does not
Property tax information comes from several different sources, and each one answers a different question. The assessed value from the assessor tells you what the county believes your property is worth for tax purposes — but this is often lower than market value and is not the same as an appraisal. The tax bill from the tax collector tells you what you owe based on that assessed value — but it does not tell you whether the assessed value is correct. The deed from the recorder tells you who owns the property and when it changed hands — but it does not tell you the assessed value or tax amount.
A common source of confusion is the difference between assessed value and market value. Your home might be worth $400,000 on the open market, but the assessor might value it at $300,000 for tax purposes. This is normal — assessments lag behind market changes and are often deliberately kept below market value. If you believe your assessed value is too high compared to recent sales of similar homes, you can file a formal appeal with the assessor, but you will need to provide evidence (comparable sales, an independent appraisal, or documentation of property defects).
Another source of confusion is the difference between the assessed value and the tax rate. Even if two homes have the same assessed value, they might owe different amounts in taxes if they are in different school districts or special taxing districts. The tax rate is set by local government and varies by location, so you cannot compare your bill directly to a neighbor's without knowing whether you are in the same taxing jurisdiction.
Appeal your assessed value if you believe it is incorrect
If you disagree with your assessed value, most counties allow you to file a formal objection or appeal. The process and important date vary by state and county, but generally you have 30 to 60 days from the date you receive your notice of assessment to file. The appeal is usually handled by the assessor's office or a county board of equalization, and you will need to provide evidence that the value is too high — such as recent sales of comparable properties, a professional appraisal, or documentation of property damage or defects.
Before you file a formal appeal, contact the assessor's office and ask them to explain how they arrived at your property's value. Sometimes the assessment is based on outdated information or a data entry error, and the assessor can correct it without a formal hearing. If you still disagree after that conversation, ask for the appeal process and important date. The assessor's office is required to provide this information and often has forms and instructions on their website.
Keep in mind that appealing your assessed value does not automatically lower your tax bill — it only lowers it if the appeal is successful and the assessor agrees to reduce the value. The appeal process is free, but if you hire a professional appraiser or attorney to help, that will cost money. For most homeowners, an appeal makes sense only if you believe your assessed value is significantly higher than comparable properties in your area.
Frequently Asked Questions
Where do I find my parcel number?
Your parcel number appears on your property tax bill, your notice of assessment, and your county assessor's online property record card. If you have your tax bill, look for a line labeled "parcel number," "account number," or "property ID." If you do not have a bill, search your address on the county assessor's website and the parcel number will appear in the results.
Can I see what my neighbors paid for their homes?
Yes, deed records are public and show the sale price of most properties. You can search the county recorder's website or the assessor's property record card, which often displays recent sales of comparable properties. Keep in mind that the sale price on a deed is not always the true market price — it may reflect a family transfer, a distressed sale, or other circumstances that do not reflect typical market conditions.
What if I cannot find my property online?
If your address does not appear in the county assessor's online search, try searching by parcel number (if you have it) or owner name. If that does not work, call the assessor's office directly — your property may be listed under a different address format or may be part of a larger parcel. The staff can locate your record and explain why it might not have appeared in the search.
How often is the assessed value updated?
This varies by state and county. Some counties reassess all properties every year; others do it every three to five years or only when a property changes hands. Your notice of assessment will tell you when your property was last assessed. If you want to know the reassessment schedule for your county, ask the assessor's office.
Do I need to do anything with the information I find?
Not necessarily. If your assessed value seems reasonable and your tax bill is paid on time, you do not need to take any action. However, if you notice an error (wrong square footage, missing exemption, or assessed value much higher than comparable homes), contact the assessor's office to report it. Errors are sometimes corrected without a formal appeal.