How to look up taxes on a property (any county, any state)

Last updated 2026-07-09

Why would you need to look up taxes on a property?

A handful of moments make the exact property tax on a parcel matter.

You're buying a home and want the real carrying cost, not Zillow's guess. You're a landlord sizing up a rental. You suspect your own assessment jumped and you want the receipts before you file. You're comparing two neighborhoods and taxes break the tie. Or you're helping an elderly parent figure out why their bill changed.

All of it starts in the same place. The public records system your county already runs, for free. No subscription. No agent. Just a browser and the right URL.

Where do you actually find property tax records?

Property taxes in the United States are administered county by county, not by the federal government and not by the state. ^[1] So the authoritative source is your county assessor (also called the county appraiser or property valuation administrator, depending on the state). The assessor sets the value. A separate treasurer or tax collector applies the rate and issues the bill.

Some counties fold both jobs into one office and one website. Others keep them apart, which means two searches: one for the assessed value, one for the dollars owed.

The fastest way to land on the right site:

1. Google: [county name] assessor property search 2. Or open the National Association of Counties directory at naco.org, find your county, and follow the assessor link. ^[11]

Most state portals now aggregate county assessor links too. The Lincoln Institute of Land Policy keeps a 50-state property tax database that cross-references state statutes with county-level data. ^[2]

Once you're on the county site, you can usually search by:

• Street address
• Parcel identification number (PIN, APN, or account number)
• Owner name (most states allow this; a few restrict it for privacy)

The parcel number is the most reliable key. Addresses sometimes carry formatting quirks that break the search. Looking up someone else's property? The parcel number is printed on the deed and available through the county recorder's office.

What specific numbers will you see in a property tax lookup?

The record that comes back has several distinct fields. They are not the same thing, and mixing them up costs people money.

Assessed value. The dollar value the county assessor assigns for taxation. It's frequently not the same as market value. Many states require assessment at a fixed percentage of market value, called the assessment ratio. California caps assessed value increases at 2% per year under Proposition 13 regardless of how fast the market runs, so assessed values there can sit far below what the home would sell for. ^[3] Texas assesses at 100% of market value, though homestead exemptions cut the taxable portion. ^[4]

Taxable value (or net assessed value). What's left after exemptions come off the assessed value: homestead, senior freeze, veteran's exemption, and the like. Your bill runs against this number, not the gross assessed value.

Millage rate (or levy rate). The tax rate expressed in mills, where one mill equals $1 per $1,000 of taxable value. Twenty mills on a $200,000 taxable value produces a $4,000 annual bill. Your county commission, school board, and any special districts set the millage every year. The assessor does not.

Annual tax bill. The actual dollars due, usually split into two semi-annual installments or four quarterly payments depending on the county.

Payment history and delinquency status. Most lookup tools show whether prior bills got paid. That matters a lot if you're buying: unpaid taxes can become a lien that survives the sale in most states.

Some counties also list last year's assessed value, so you can spot the year-over-year change at a glance.

How do effective property tax rates compare across states?

The nominal bill tells you less than you'd think across state lines, because assessed values and assessment ratios swing so much. The cleaner metric is the effective tax rate: annual taxes paid divided by the property's actual market value.

The Lincoln Institute of Land Policy's 50-State Property Tax Comparison Study (2023 data, published 2024) calculated effective rates for the largest city in each state. ^[2] Here's a representative sample.

State	Largest city	Effective rate (owner-occupied)
New Jersey	Newark	2.15%
Illinois	Chicago	1.97%
Texas	Houston	1.63%
Minnesota	Minneapolis	1.07%
New York	New York City	0.88%
Florida	Miami	0.86%
California	Los Angeles	0.73%
Colorado	Denver	0.50%
Hawaii	Honolulu	0.27%

These are city-level figures for a median-value home. Suburban counties inside each state often run higher or lower. Want the rate for a specific parcel? Divide the actual tax bill you pulled from the county lookup by the home's current market sale price, not the assessed value.

For major metro lookups you can reference: nyc property tax, la county property tax, miami dade property taxes, and santa clara property tax.

How do you look up property taxes in the largest counties step by step?

The mechanics shift just enough between counties to trip people up. Here's the walkthrough for several of the country's biggest systems.

Los Angeles County, CA. Go to assessor.lacounty.gov. Click "Property Search." Enter the address. The Assessor's page shows the assessed land and improvement values. For the actual bill, follow the link to the LA County Treasurer and Tax Collector at ttc.lacounty.gov. ^[5] Search there by AIN (Assessor Identification Number) to pull current and prior bills plus payment status.

Harris County (Houston), TX. Go to hcad.org, the Harris County Appraisal District site. Search by address or account number. You'll see the appraised value, the capped value, any exemptions applied, and a breakdown of each taxing unit (county, school district, MUD) that feeds the total. ^[12] Texas appraisal districts are separate legal entities from tax collectors, so the bill comes from the Harris County Tax Office at tax.harriscountytx.gov.

Cook County (Chicago), IL. The Cook County Assessor's Office at cookcountyassessor.com handles valuations. Bills come from the Cook County Treasurer at cookcountytreasurer.com. Search by address or PIN. Cook County runs a triennial reassessment by township, so the year the assessment was last updated matters.

Maricopa County (Phoenix), AZ. Search the Maricopa County Assessor at mcassessor.maricopa.gov. Arizona uses a limited property value (LPV) system where increases are capped at 5% per year for most residential properties under A.R.S. § 42-13302. ^[6] The taxable value can differ a lot from the full cash value shown in the record.

Hennepin County (Minneapolis), MN. The hennepin county property tax portal at hennepin.us combines assessor and treasurer data in one search. Enter the address for the estimated market value, the taxable market value, all exemptions, and the current bill with payment history.

Collin County (Dallas suburbs), TX. The collin county property tax search runs through the Collin Central Appraisal District at collincad.org. The process mirrors Harris County: appraisal district for value, separate tax office for the bill.

Contra Costa County, CA. The contra costa county property tax assessor portal is at contracosta.ca.gov, with bills through the Treasurer-Tax Collector on the same county domain.

For online tax payment for property across multiple counties, most treasurer portals now take credit and debit payments, though convenience fees of 2% to 3% are typical.

Can you look up property taxes on a home you don't own?

Yes. Property tax records are public in all 50 states. You don't need to be the owner, a licensed agent, or to give any reason.

That's the whole point. Transparent government taxation means anyone can check what any parcel is assessed at and whether the taxes are paid. Title companies, mortgage lenders, and buyers all lean on it every day.

A few states restrict owner-name searches for privacy, Florida most notably after its address confidentiality rules, but you can still search by property address or parcel number with no restriction.

Third-party aggregators like Zillow, Redfin, and Realtor.com pull from county data and show assessed values and tax estimates on their property pages. Convenient, but they lag the county's own data by weeks or months and sometimes carry errors. For anything that matters legally or financially, go straight to the county source.

What if the property tax lookup shows a number that looks wrong?

This happens more than most homeowners realize. The National Taxpayers Union Foundation estimated in a 2023 analysis that between 30% and 60% of taxable properties in the U.S. are overassessed relative to actual market value. ^[7] That range carries wide uncertainty, but even the low end says a large share of homeowners are paying too much.

If the assessed value in the lookup runs higher than what the property would sell for today, investigate. Here's the quick test:

1. Pull three to five recent sale prices for comparable homes within a half-mile, similar in age, size, and condition. County assessor sites and the MLS (through Redfin or Zillow) both show recent sales. 2. If your assessed value divided by your state's assessment ratio beats what those comps sold for, you likely have grounds to appeal.

Assessment ratios matter here. If your state assesses at 80% of market value and comparable homes sold for $300,000, the correct assessed value should land near $240,000. A lookup showing $290,000 is a real overassessment.

Every county runs a formal appeal process with a filing deadline, usually 30 to 90 days after the assessment notice is mailed. Miss it by one day and you almost always wait another year. ^[8] To build your own appeal without a contingency firm taking 30% to 50% of your refund, the TaxFightBack DIY appeal kit walks through the whole evidence package.

For property tax taxation background, knowing how the rate gets set shows you which part of the bill you can actually fight (the assessed value) versus which part you can't (the millage rate, which takes a political process to change).

How do exemptions change the tax number you see in a lookup?

The gross assessed value in a lookup is not what most homeowners pay against. Exemptions cut the taxable value, sometimes hard.

The homestead exemption is the most common. In Florida, the homestead exemption removes the first $50,000 of assessed value from school district taxes and the first $25,000 from all other taxes, per Florida Statute § 196.031. ^[9] On a $300,000 assessed value, that drops the school taxable value to $250,000 and the non-school taxable value to $275,000.

Senior exemptions, disability exemptions, and veteran exemptions stack on top of or alongside the homestead exemption depending on the state. Texas offers a 100% exemption for veterans with a 100% service-connected disability rating. ^[4]

If the lookup shows no homestead exemption on a property you own and live in as your primary residence, apply now. The savings are real and the application is free. Many counties let you file online through the same assessor portal where you ran the lookup.

Some exemptions, especially senior freeze programs, cap future increases rather than cutting the current bill. The lookup may show the gross assessed value climbing year over year while the taxable value holds flat because of the freeze. Watch both lines.

What does delinquent status in a property tax lookup mean?

If the lookup shows unpaid taxes, take it seriously. In most states, unpaid property taxes become a lien that takes priority over a mortgage. The lien can survive a sale.

Counties handle delinquency differently. Some sell tax lien certificates to investors who earn interest and eventually foreclose if the debt isn't redeemed. Others hold the lien internally and pursue the property through a tax deed process. The runway before a forced sale ranges from one year in some jurisdictions to five in others.

For a buyer, finding delinquent taxes during due diligence isn't automatically a deal-breaker. If the seller agrees to clear the back taxes at closing, the title company handles it. What you don't want is to find the delinquency after closing.

For a current owner who can't pay, most counties offer payment plans, and many states run property tax deferral programs for seniors or low-income owners that delay payment without penalty until the property sells. Check your county treasurer's site directly for those.

Are there free national tools that aggregate property tax data?

Several aggregators compile county data into searchable national databases. None replace the county source for accuracy.

Zillow. The "Public Records" section on each listing page shows the assessed value and tax history pulled from county data. Good for a quick look, often months behind.

Redfin. Similar to Zillow. The "Property Details" tab shows tax history and, in many markets, a link to the county tax records.

PropertyShark. More detailed than the consumer portals, common among investors and attorneys. Free lookups are limited; fuller reports need a paid account.

SmartAsset's property tax calculator. Estimates a tax bill from home value and county rates, useful for projections but not a stand-in for the actual county lookup. ^[10]

ATTOM Data Solutions. A professional-grade property database used by lenders and institutions. Not built for individual lookups, but worth knowing if you're doing bulk research.

Here's the honest answer: no national aggregator has real-time parity with every county assessor. When the number matters, check the county. For williamson county property tax, san mateo county property tax, and detroit property taxes, the county portals beat the aggregator data cold.

The IRS does not administer property taxes and its site has no property tax lookup. Property taxes are not federal. ^[1]

How do you read a property tax bill once you find it?

The bill can confuse people because it layers multiple taxing jurisdictions onto one document. A typical bill in a mid-size suburban county might include:

• County general fund levy
• County road and bridge levy
• School district operational levy
• School district debt service levy
• Municipal levy (city or township)
• Special district levies (fire, water, mosquito control)

Each carries its own millage rate. The total bill is the sum of all of them applied against the taxable value.

Comparing your bill to a neighbor's and wondering why they pay less? The answer is almost always one of three things: they hold an exemption you don't, their property has a lower assessed value, or they sit in a slightly different special district boundary.

The payment due dates on the bill are hard deadlines in most counties. Miss one by a day and you typically trigger a penalty of 1% to 2% of the bill plus interest that accrues monthly. A few counties offer a short grace period (usually 10 days). Don't count on it. Most counties now show these due dates and payment status in the online lookup alongside the bill amount.

What should you do after you look up the property taxes?

Looking up the tax is step one. What comes next depends on why you looked.

Buying? Fold the full tax bill into your monthly housing cost. A $6,000 annual tax is $500 a month added to PITI. Pull the most recent bill from the county lookup, not from the listing agent, because taxes can jump after a sale in many states if the sale price triggers a reassessment (common in states without Prop 13-style caps).

Checking your own property and the assessed value looks too high? Pull comparable recent sales now, before your deadline passes. The appeal window in most states opens when the assessment notice mails, usually in spring, and closes 30 to 90 days later. Missed this year's window? Document the comps anyway and file the moment the next notice arrives.

Found missing exemptions? Apply now. Homestead, senior, and veteran exemptions almost never apply automatically. You have to file. Exemption application deadlines commonly fall around March 1 through March 15 for the following tax year in many states, though this varies.

Researching an investment property? Calculate the effective rate, check for delinquency, look at the prior five years of assessment history (most county tools show this), and check whether special assessments or bonds are attached to the parcel. All of it lives in the public record.

The TaxFightBack DIY appeal kit is built for homeowners who've done this research and want to file their own appeal with real evidence, keeping 100% of any reduction instead of paying a contingency firm. Worth a look if the numbers from your lookup show a clear overassessment.

Frequently asked questions

How do I look up property taxes on a house by address?

Go to your county assessor's website and use the address search field. Almost every county in the U.S. offers this for free. If you don't know the assessor's URL, Google '[county name] assessor property search' or visit naco.org to find your county's official site. The search returns assessed value, exemptions, taxable value, and usually the current tax bill with payment history.

Is property tax information public record?

Yes, in all 50 states. Property tax assessments, bills, and payment history are public records open to anyone. A few states restrict owner-name searches for privacy but still allow address and parcel number searches. Third-party sites like Zillow aggregate this data, but the county assessor or treasurer's portal is always the authoritative source.

How do I find the parcel number for a property?

The parcel number (also called APN, PIN, or account number depending on the county) appears on the deed, the most recent tax bill, and the county assessor's property record. If you have the address, run a quick address search on the county assessor site first and the parcel number lands in the results. It's the most reliable key for future lookups.

Can I look up property taxes on a house I'm thinking about buying?

Yes. Property records are public. Go to the county assessor's site, search by address, and pull the current assessed value and tax bill directly. Don't lean only on the listing agent or Zillow. In many states, a sale triggers a reassessment that changes the bill, so ask your real estate attorney or title company what the estimated post-sale assessment would be.

Why does the assessed value differ from the market value?

States set their own assessment ratios and rate-cap rules. California limits assessed value increases to 2% per year under Proposition 13, so assessed values often run well below market value in hot markets. Texas assesses at 100% of market value but applies exemptions to cut the taxable portion. The effective tax rate (taxes divided by actual market value) is a cleaner comparison across states.

How do I find out if property taxes are delinquent before buying?

Search the county treasurer or tax collector's website by parcel number or address. Most county portals show prior-year payment history and flag delinquent balances. Your title company also catches this during the title search. Unpaid property taxes become a lien with priority over most other claims, so confirm full payment at or before closing.

How often are property taxes reassessed?

It varies by state and county. Some jurisdictions reassess annually, others on a two-year or four-year cycle. California reassesses only when a property changes ownership or undergoes new construction (Proposition 13). Texas appraisal districts reassess every year. Most county assessor websites show the date of the last assessment and often list assessed values going back several years.

What is a millage rate and how do I calculate my tax bill from it?

A mill equals $1 of tax per $1,000 of taxable value. Multiply your taxable value by the total millage rate and divide by 1,000. Example: a $200,000 taxable value at 25 mills produces a $5,000 annual bill. The total millage rate is the sum of all levying jurisdictions (county, school, city, special districts) and shows on the tax bill or in the county lookup.

How do I know if I'm paying too much in property taxes?

Compare your assessed value to recent sale prices of similar homes nearby. If your assessed value (adjusted for your state's assessment ratio) beats what comparable homes sold for, you're likely overassessed. The National Taxpayers Union Foundation estimated in 2023 that 30% to 60% of taxable U.S. properties are overassessed. Pull three to five recent comparable sales from the county assessor site or Redfin to check.

Can I look up property taxes using only a name?

In most counties, yes. Owner-name search is available on the county assessor portal. A few states restrict it for privacy: Florida limits certain address and name lookups for protected individuals under its address confidentiality program. If name search is blocked, use the property address or parcel number instead. Third-party tools like PropertyShark also support name searches in many markets.

What exemptions can reduce the taxable value I see in a lookup?

The most common are the homestead exemption (primary residences), senior exemption, disability exemption, and veteran exemption. Florida's homestead exemption removes up to $50,000 from assessed value for school taxes. Texas offers a 100% exemption for veterans with a 100% service-connected disability rating. Exemptions usually require an application, either annually or on first qualification. They're not automatic.

How do I appeal if the property tax lookup shows my assessment is too high?

File a formal appeal with your county board of review or appraisal review board before the deadline, usually 30 to 90 days after the assessment notice mails. Your evidence should include recent comparable sales showing lower values for similar properties. You don't need a contingency firm; homeowners who self-represent with solid comps win at similar rates and keep 100% of any savings.

Do property tax records show the full history of taxes paid?

Most county portals show three to five years of tax history, some go further. You'll see the assessed value in each year, any exemptions, the amount billed, and whether it was paid or is delinquent. For older records, contact the county treasurer's office directly. Assessment history is useful for spotting unusual jumps worth contesting.

Is there a single national website to look up property taxes anywhere?

No single authoritative national database exists. Zillow and Redfin aggregate county data and show it on property pages, but they lag the county's own records by weeks or months and occasionally carry errors. For anything that matters financially or legally, go directly to the county assessor's or treasurer's website. The National Association of Counties at naco.org links to every county's official site.

Sources

1. IRS, Individuals section: Property taxes are administered at the local county level, not the federal level; the IRS has no property tax lookup function.
2. Lincoln Institute of Land Policy, 50-State Property Tax Comparison Study 2024: Effective property tax rates for the largest city in each state, calculated as annual taxes paid divided by actual market value, based on 2023 data.
3. California State Board of Equalization, Proposition 13 Overview: Proposition 13 limits annual assessed value increases to 2% for California properties unless ownership changes or new construction occurs.
4. Texas Comptroller of Public Accounts, Property Tax Exemptions: Texas assesses residential property at 100% of market value; veterans with a 100% service-connected disability rating qualify for a 100% homestead exemption.
5. Los Angeles County Treasurer and Tax Collector: LA County issues property tax bills through the Treasurer and Tax Collector, searchable by Assessor Identification Number.
6. Arizona State Legislature, A.R.S. § 42-13302 (Limited Property Value): Arizona law limits annual increases in limited property value (the value used for tax calculation) to 5% per year for most residential properties.
7. National Taxpayers Union Foundation, Overassessment Analysis 2023: Between 30% and 60% of taxable properties in the U.S. may be overassessed relative to market value, based on 2023 NTUF analysis.
8. Lincoln Institute of Land Policy, property tax appeal deadline data: Appeal filing windows typically run 30-90 days after the assessment notice is mailed, and missing the deadline usually bars appeal for that year.
9. Florida Legislature, Florida Statutes § 196.031 (Homestead Exemption): Florida's homestead exemption removes the first $50,000 of assessed value from school district taxes and the first $25,000 from all other taxes.
10. SmartAsset, Property Tax Calculator: SmartAsset provides county-level effective property tax rate estimates for use in projecting tax bills by home value.
11. National Association of Counties (NACo): NACo maintains a directory linking to every county's official website, including assessor and treasurer portals.
12. Harris County Appraisal District: Harris County Appraisal District provides searchable property records including appraised value, capped value, exemptions, and each taxing unit's contribution to the total bill.