Washington state property tax lookup by address: the complete guide

Last updated 2026-07-09

Where do you actually look up property tax by address in Washington state?

The answer is your county assessor's website, not a single statewide portal. Washington has 39 counties, and each one runs its own parcel search tool. Most let you search by owner name, parcel number, or street address.

The Washington State Department of Revenue publishes a directory of all 39 county assessors with links to their individual sites at dor.wa.gov ^[1]. That page is the fastest starting point if you don't know which county to go to.

Here are the direct parcel search portals for the largest counties:

County	Portal URL	Search by address?
King (Seattle)	blue.kingcounty.gov/Assessor/eRealProperty	Yes
Pierce (Tacoma)	assessor.co.pierce.wa.us	Yes
Snohomish (Everett)	snohomishcountywa.gov/573/Assessor	Yes
Spokane	assessor.spokanecounty.org	Yes
Clark (Vancouver, WA)	clark.wa.gov/assessor	Yes
Thurston (Olympia)	thurstoncountywa.gov/departments/assessor	Yes
Kitsap (Bremerton)	kitsapgov.com/assessor	Yes

Once you find your parcel, you'll typically see the situs address, the assessed value broken into land and improvements, the levy rate (in dollars per $1,000 of assessed value), the current year's tax amount, and any exemptions applied. Some counties also show the prior year's value so you can spot the jump immediately.

If a property sits in a small rural county and the portal is clunky, call the assessor's office directly. Under RCW 84.40.020, assessors have to keep assessment records open to public inspection ^[2]. They can't refuse you.

How do you calculate property tax in Washington state?

The formula is simple: (Assessed Value / 1,000) x Levy Rate = Annual Tax.

A home assessed at $650,000 in a jurisdiction with a combined levy rate of $9.50 per $1,000 owes $6,175 a year. That's the whole math.

Washington assesses at 100% of true and fair market value under RCW 84.40.030, which says property "shall be valued at one hundred percent of its true and fair value in money" ^[2]. That's different from states that assess at a fraction of market value, so don't get lulled by the apparent simplicity.

The levy rate is not one flat number. It stacks multiple taxing districts:

• State school levy (the "McCleary levy" passed after the 2018 Supreme Court ruling)
• Local school district levy
• County general fund
• City or town (if incorporated)
• Fire district
• Library district
• Port district
• Hospital district
• Any voter-approved special levies

All of those rates add together to produce the total levy rate on your tax statement. In King County, combined rates for 2024 ran roughly $7 to $13 per $1,000 depending on which district stack applies to your parcel ^[3]. Rural counties often run lower.

The state constitution caps regular levy rates at $10 per $1,000 of assessed value for all non-voter-approved levies combined ^[4]. Voter-approved excess levies can push the total above that cap. So if your combined rate looks high, check whether your district passed a recent bond or levy lid lift.

One more wrinkle. Washington limits annual increases in the regular levy amount (not the rate) to 1% without a vote, under RCW 84.55 ^[5]. So even if your assessed value jumps 20%, the taxing district can't automatically collect 20% more. The rate adjusts down to stay within the 1% limit. This is why many homeowners watch their assessed value rise faster than their actual tax bill.

What information shows up in a Washington property tax lookup?

When you pull up a parcel in a county assessor portal, expect to see most or all of these fields:

Parcel number (APN). The unique identifier. Every document, appeal form, and treasurer's record uses this.

Situs address. The physical location of the property.

Owner of record. Name and sometimes mailing address as of the last deed transfer.

Legal description. Plat and lot/block, or metes and bounds for rural parcels.

Land value. The assessor's estimate of the underlying land alone.

Improvement value. The estimated value of structures. Land plus improvements equals total assessed value.

Levy code. A short code that identifies the precise stack of taxing districts for your parcel. Two houses on the same street can have different levy codes if one sits in a fire district and the other doesn't.

Levy rate. Expressed as dollars per $1,000. This is applied to the assessed value to produce the tax.

Current year tax. The total amount owed for the calendar year.

Exemptions on file. Senior/disabled exemptions, current-use (open space/farm/timber) classifications, and any other adjustments.

Tax payment status. Whether the first or second half has been paid, and any delinquency.

King County's eRealProperty system also shows sales history, permits, and comparable sales, which makes it especially useful for building an appeal ^[3]. If your county's portal is bare-bones, request the property record card from the assessor's office to see the full detail behind the valuation.

How do you read your assessed value and know if it's too high?

Open the lookup result and write down the total assessed value. Then find two or three recent sales of similar homes in your neighborhood, ideally from the same calendar year as the assessor's valuation date.

In Washington, assessors value property as of January 1 of the assessment year ^[2]. So for taxes payable in 2025, the relevant market snapshot is January 1, 2024. Compare your assessed value to what genuinely similar homes sold for around that date, not what they're listing for today.

If your assessed value sits 10% or more above what comparable homes sold for, you have a real argument. The Washington State Department of Revenue's ratio study tracks how closely assessments follow sales prices by county. A ratio above 1.00 means the county is over-assessing relative to sales ^[1].

Also check the assessor's property record card. The card lists square footage, number of bathrooms, construction grade, and condition rating. Assessors use this data to calculate value. If the card says you have 2,800 square feet but your home is 2,400, or it lists a second full bath you don't have, the overvaluation has nothing to do with the market. It's a data error. Those are the easiest appeals to win.

King County's 2024 residential median assessment ratio was approximately 0.94, meaning assessments ran slightly below sale prices on average ^[3]. That's healthy. But medians hide outliers. Your specific property could still be assessed well above its actual market value even in a county with a good aggregate ratio.

What exemptions can reduce your Washington property tax bill?

Washington runs several programs that lower the taxable value or freeze the tax amount. The two biggest for homeowners:

Senior Citizen / Disabled Person Exemption. Under RCW 84.36.381, qualifying seniors (age 61 or older by December 31 of the application year) and certain disabled persons get a partial exemption on their primary residence ^[6]. Income limits for 2024 come in three tiers: combined disposable income under $40,447 gets the largest reduction; under $49,435 gets a mid-tier benefit; and under $58,423 qualifies for the lowest tier. The Washington State Legislature raised these thresholds in 2023 (SB 5191), so if you applied years ago and stopped qualifying, reapply ^[6].

Current-Use Programs (Open Space, Farmland, Timber). Under RCW 84.34, agricultural land and open space can be taxed at its current use value rather than highest-and-best-use value ^[5]. The savings can be enormous for rural parcels. There's a covenant requirement and a penalty for conversion, so read the terms before applying.

Home Improvement Exemption. Under RCW 84.36.400, certain home improvements for physically disabled persons (wheelchair ramps, wider doorways, and the like) can be excluded from the assessed value for up to ten years.

Property Tax Deferral. Separate from the exemption, low-income homeowners can defer payment of property taxes as a lien against the property until it's sold, under RCW 84.38.

To apply for the senior exemption, file with your county assessor by December 31 of the year before the taxes are due. Most counties take applications online or by mail. Bring proof of age, income documents (Social Security statement, tax return), and proof you own and occupy the home.

One thing many homeowners miss: the exemption reduces the assessed value used for the state levy and some local levies, but not all of them. Your bill drops, but not to zero. The county treasurer's statement should show the adjusted amounts by levy line.

When is the Washington state property tax appeal deadline?

The standard deadline to appeal your assessment to the county Board of Equalization (BOE) is July 1 of the assessment year, or within 30 days of when the change-of-value notice was mailed, whichever is later ^[7].

That deadline matters enormously. Miss it and you lose your right to appeal that year's value. You can't go back and retroactively challenge an old assessment.

Here's the typical timeline:

Date	What happens
January 1	Valuation date for the assessment year
Spring (varies by county)	Change-of-value notices mailed
July 1	Standard BOE appeal deadline
October 31	First half taxes due (some counties: April 30)
First half + 6 months	Second half taxes due

Not every county mails notices at the same time. King County typically sends revaluation notices in the spring. Some smaller counties mail them later. The 30-day clock from mailing can extend your deadline past July 1 if notices go out late.

Miss the BOE deadline and your remaining options are thin. You can ask for a manifest error correction under RCW 84.48.065 if the assessor made a clear factual mistake (like listing the wrong square footage) ^[7]. You can also petition the county for a refund if you discover an error after taxes are paid, under RCW 84.69.020.

After the BOE, you can appeal to the Washington State Board of Tax Appeals (BTA) and, after that, to Superior Court. Each step needs a new filing within a specific window after the prior decision.

If you want to build your own appeal without paying a contingency firm, the TaxFightBack DIY Appeal Kit walks through gathering comps and completing the BOE petition form specific to Washington counties.

How do you file a property tax appeal in Washington state?

The appeal goes to the county Board of Equalization, not the assessor. Here's the basic process:

Step 1: Get the petition form. Each county BOE has its own form. Most are available on the county assessor or clerk's website. King County's is at kingcounty.gov/depts/finance-business-operations/BOE ^[3].

Step 2: State your basis. You must clearly state that the assessed value exceeds true and fair market value (the legal standard under RCW 84.40.030). The form asks for your opinion of value and the facts supporting it ^[2].

Step 3: Gather evidence. Comparable sales are the most persuasive evidence. Pull three to five sales of similar homes within roughly half a mile, with the same basic characteristics, that closed around January 1 of the assessment year. Get these from Zillow, Redfin, county parcel portals, or a licensed agent's CMA. If the assessor's record card has errors (wrong square footage, wrong bath count, wrong year built), a simple correction letter with a floor plan or permit record can be enough on its own.

Step 4: File by the deadline. Mail or file online by July 1 (or within 30 days of your notice, whichever is later). Keep a delivery confirmation.

Step 5: Prepare for the hearing. BOE hearings are informal. You present your evidence, the assessor presents theirs, the board decides. In King County, the BOE granted some reduction in roughly 40 to 50% of residential hearings in recent years (per BOE annual reports), though results vary by county and year ^[3].

Step 6: Accept or escalate. If the BOE rules against you, you have 30 days to appeal to the State Board of Tax Appeals. Most residential appeals never go that far.

How does Washington's property tax rate compare to other states?

Washington's average effective property tax rate is roughly 0.84% of market value, which puts it in the middle tier nationally ^[8]. That's lower than Illinois (around 1.88%), New Jersey (around 2.23%), or Texas (around 1.60%), but higher than Hawaii (around 0.27%) or Alabama (around 0.37%).

Washington's nominal rates look moderate partly for a structural reason: the state constitution's $10 per $1,000 cap on regular levies and the 1% annual levy increase limit hold rates down ^[4]. The flip side is that Washington has no state income tax, so property and sales taxes carry more of the fiscal load than in states with broad income taxes.

For a full state-by-state comparison, see our guides on property tax by state 2025 and states ranked by property tax. If you're wondering about outliers on either end, states with no property tax explains how a handful of states handle that and what it actually means for homeowners.

Inside Washington, rates vary a lot by county. Urban counties like King and Snohomish tend to have higher assessed values and stacked levies. Rural counties have lower values but similar levy structures. Your actual tax bill depends heavily on which special districts your parcel falls in.

What's the difference between assessed value, appraised value, and market value in Washington?

These terms confuse a lot of people, and the confusion gets expensive.

Market value is what a willing buyer would pay a willing seller in an arm's-length transaction. It's the real-world price.

Appraised value usually means a licensed appraiser's formal estimate of market value, used in mortgage transactions.

Assessed value in Washington is the county assessor's mass-appraisal estimate of market value as of January 1. By state law it should equal 100% of market value ^[2]. In practice it often lags the market, especially in fast-rising markets, because assessors revalue on a rotating schedule rather than annually for every parcel.

The key distinction for appeals: the legal standard isn't whether your home is worth X on Zillow today. It's whether the assessor's January 1 value was above what a buyer would have paid on January 1. Those can be different numbers in a volatile market.

One more concept. Taxable value can differ from assessed value once exemptions are applied. A senior with a partial exemption may have a lower taxable value for the state levy than the full assessed value shown on the lookup tool.

How do you find comparable sales to challenge your Washington assessment?

Start with the county assessor's own portal. Most Washington county portals let you search recent sales by neighborhood or area. King County's eRealProperty shows sales history right on comparable parcel records ^[3]. Pull all sales within roughly half a mile and the same or similar property class from the six months straddling January 1 of the assessment year.

Filter for genuine comparables: same general age, same construction type (wood frame vs. masonry), within 20% of your square footage, similar lot size, similar condition. Don't use a complete teardown as a comp for a renovated home.

Adjust for differences. A comp with one fewer bathroom should be adjusted up (it's worth less, so your value should come down). A comp with a larger lot should be adjusted down. Keep adjustments simple and defensible for a BOE hearing.

Free sources beyond the assessor's portal: Zillow's sold data, Redfin's sold history, and the county's public records system. For Snohomish County, NWMLS sales data comes through a real estate agent or the county portal.

The Washington Department of Revenue's ratio studies also publish median ratios by county and stratum, so you can see whether the assessor's office tends to over- or under-assess properties in your price range ^[10]. If the ratio for your stratum runs above 1.00, you have a structural argument on top of your individual comps.

For more on how to build a comparable-sale argument, see our guide on property tax ranking by state for context, and check state-specific appeal guides like how to appeal property taxes in Texas for a side-by-side look at how other states handle the comparable evidence standard.

What happens if you don't pay your Washington property tax on time?

Property taxes in Washington are due in two installments. The first half is due April 30. The second half is due October 31. Some smaller counties collect the full year by April 30 if the total bill is under $50 ^[9].

Miss April 30 and interest accrues at 1% per month on the unpaid first-half amount starting May 1, under RCW 84.56.020 ^[9]. There's also a 3% penalty added June 1 if it's still unpaid. The penalty climbs over time.

Let taxes go three years delinquent and the county can begin a tax foreclosure proceeding. Washington uses a nonjudicial process for property tax foreclosures, so it moves faster than a mortgage foreclosure. A tax foreclosure extinguishes all junior liens including mortgages.

If your lender collects property taxes through an escrow account, they're responsible for paying on time from that account. But you're still the one who suffers the foreclosure if they fail to pay. Check your parcel's payment status through the county treasurer's lookup tool each year.

The county treasurer is a separate office from the county assessor. The assessor sets value; the treasurer collects taxes. Both have online portals in most Washington counties. King County Treasurer records are searchable at kingcounty.gov/depts/finance-business-operations/treasury ^[3].

Can you look up a Washington property tax record for someone else's property?

Yes. All parcel assessment records in Washington are public records under RCW 84.40.020 ^[2]. You don't need to own the property to look it up. There's no login required on most county portals.

This is useful for a few reasons. Before buying a home, you can verify the current assessed value, check for delinquent taxes, and see if any exemptions are attached that will vanish when you take ownership (a senior exemption disappears on sale, for instance).

Investors and landlords routinely look up neighbor parcels to gauge assessment consistency. If your parcel is assessed 15% higher than the nearly identical house next door, that inequity argument can support your appeal even without sale comparables.

The data typically available publicly: assessed value, levy code, tax amount, owner name, and payment status. Some counties also show the physical characteristics (square footage, year built). In most cases, the mailing address for the owner of record is public too.

One thing you won't find in the standard parcel lookup: deed details or mortgage amounts. For those, you need the county auditor's records, which are also public but sit in a separate system.

Frequently asked questions

Is there a single statewide Washington property tax lookup tool?

No. Washington does not have one statewide parcel portal. Each of the 39 counties runs its own assessor's website. The Washington State Department of Revenue at dor.wa.gov keeps a directory of all county assessor links, which is the best starting point. For the largest counties, King, Pierce, Snohomish, Spokane, and Clark each have full-featured address-search tools directly on their assessor sites.

How often does Washington reassess property values?

Counties must physically inspect each parcel at least once every six years under RCW 84.41.030, but assessed values can be updated annually without a physical inspection. King County revalues all property annually on a rotating area basis. Smaller counties may revalue less often. The result is that assessed values in fast-moving markets can lag actual prices for one to two years between full revaluations.

What is the Washington state levy limit and how does it affect my tax bill?

Under RCW 84.55, regular property tax levies cannot grow by more than 1% per year in total dollars collected, without voter approval. So even if your assessed value jumps 20%, the taxing district's levy rate typically drops to stay within the 1% growth cap. Your individual bill can still rise if your assessed value grew faster than average in your jurisdiction, but the cap prevents runaway revenue growth.

What income limit applies to the Washington senior property tax exemption in 2025?

For taxes payable in 2025, the combined disposable income thresholds under RCW 84.36.381 are approximately $40,000, $49,000, and $58,000 for the three benefit tiers (exact figures are adjusted each year by the Department of Revenue). The 2023 legislation (SB 5191) raised these thresholds significantly. Apply through your county assessor's office by December 31 of the year before taxes are due.

How do I look up whether there are delinquent taxes on a Washington property?

Use the county treasurer's portal, which is separate from the assessor's portal. Most county treasurer sites let you search by parcel number or address to see current and prior-year payment status, including any delinquent amounts, penalties, and interest. If the assessor's portal shows payment status, that data typically comes from the treasurer's records. Delinquent taxes survive a sale in most cases and become the buyer's liability.

Can I appeal my property taxes if I already paid them?

Yes, with limitations. You must still have filed a timely appeal with the county Board of Equalization before July 1 (or within 30 days of your notice). Paying the tax bill does not waive your right to appeal the value. If you overpaid because of a clear error, you can petition for a refund under RCW 84.69.020 after the taxes are paid. A manifest error correction under RCW 84.48.065 is also available for clear factual mistakes regardless of payment status.

What is the Washington property tax rate per $1,000 of assessed value?

There is no single statewide rate. Levy rates vary by parcel because each parcel sits in a unique combination of taxing districts. The state school levy alone runs around $2.70 per $1,000 (the rate adjusts annually). Combined with local levies, most residential parcels in King County pay roughly $7 to $13 per $1,000. Rural counties often have lower combined rates. Look up your specific levy code through your county assessor's portal for the exact figure.

How do I get a property record card from my Washington county assessor?

Most county assessors in Washington make property record cards available through their online parcel portal, either as a PDF download or as data fields on the parcel detail page. If your county's portal doesn't show the card, call the assessor's office and request it. Under RCW 84.40.020, assessment records are public and the assessor cannot refuse. The card shows the physical characteristics the assessor used to calculate your value.

What's the difference between the county assessor and the county treasurer in Washington?

The assessor sets the assessed value of your property and applies any exemptions. The treasurer handles billing, collection, and payment records. For appeals, go to the assessor or the Board of Equalization. For paying taxes, setting up installments, or checking for delinquencies, go to the treasurer. Both are elected county officials and both keep separate online portals in most Washington counties.

How do I appeal my property assessment to the Washington State Board of Tax Appeals?

After the county Board of Equalization issues its decision, you have 30 days to appeal to the Washington State Board of Tax Appeals (BTA) at bta.wa.gov. File a petition online or by mail with the BTA, pay a small filing fee (currently $25 for residential appeals), and reference the BOE docket number. BTA hearings are more formal than BOE hearings. You can represent yourself or hire an attorney or agent. After the BTA, the next step is Superior Court.

Does Washington state have a homestead exemption like Texas or Florida?

Not in the same form. Washington does not have a universal homestead exemption that reduces assessed value for all owner-occupants. The main residency-based benefit is the Senior Citizen and Disabled Person Exemption under RCW 84.36.381, which requires meeting age and income thresholds. Washington also has a homestead exemption in bankruptcy and creditor protection law, but that is separate from property tax and does not reduce your tax bill.

How do Washington property taxes compare to states like Texas or New Jersey?

Washington's average effective rate of roughly 0.84% is well below Texas (around 1.60%) or New Jersey (around 2.23%), two of the highest-rate states. Washington has no state income tax, which shifts more fiscal weight to property and sales taxes, but the constitutional levy cap and 1% annual growth limit constrain how fast property tax bills can rise. See our property tax by state 2025 guide for a full national comparison.

Can I find out what my neighbor paid in property taxes in Washington?

Yes. Assessment records and tax amounts are public under RCW 84.40.020. Look up any parcel by address on the county assessor's portal to see its assessed value and tax bill. The owner's name is also public record. This information is genuinely useful for an appeal: if your parcel is assessed noticeably higher than a comparable neighbor's parcel, that inequity can support an argument that your assessment exceeds true and fair market value.

What is a levy code and why does it matter for my Washington property tax?

A levy code is a short identifier, usually a three- to five-digit number, that tells the county treasurer which combination of taxing districts applies to your parcel. Two adjacent parcels can have different levy codes if they fall in different fire, school, or library districts. Your levy code determines which levy rates apply and therefore your effective tax rate. It appears on your county assessor's parcel lookup page. If your levy code changed after a jurisdiction boundary adjustment, your rate could change significantly.

Sources

1. Washington State Department of Revenue, County Assessor Directory: The Washington State Department of Revenue publishes a directory of all 39 county assessors and links to their individual parcel search tools.
2. Washington State Legislature, RCW 84.40.030 and RCW 84.40.020: RCW 84.40.030 requires property to be valued at 100% of true and fair market value; RCW 84.40.020 requires assessment records to be open to public inspection.
3. King County Assessor, eRealProperty Parcel Search: King County's portal shows assessed value, sales history, levy codes, and levy rates; King County 2024 combined residential levy rates ran roughly $7 to $13 per $1,000.
4. Washington State Constitution, Article VII Section 2 and RCW 84.52: Washington's state constitution caps regular property tax levy rates at $10 per $1,000 of assessed value for all non-voter-approved levies combined.
5. Washington State Legislature, RCW 84.55 and RCW 84.34: RCW 84.55 limits annual regular levy increases to 1% without a vote; RCW 84.34 authorizes current-use taxation for agricultural and open-space land.
6. Washington State Legislature, RCW 84.36.381, Senior/Disabled Exemption: RCW 84.36.381 establishes the senior citizen and disabled person property tax exemption with income-tiered thresholds; SB 5191 (2023) raised the income limits significantly.
7. Washington State Legislature, RCW 84.48.010 and RCW 84.48.065: RCW 84.48.010 sets the July 1 standard deadline for BOE appeals; RCW 84.48.065 permits manifest error corrections after the deadline.
8. Tax Foundation, Property Taxes by State 2024: Washington's average effective property tax rate is approximately 0.84% of market value, placing it in the mid-range nationally.
9. Washington State Legislature, RCW 84.56.020: RCW 84.56.020 sets first-half taxes due April 30 and second-half due October 31, with 1% monthly interest and a 3% penalty beginning June 1 for unpaid first-half taxes.
10. Washington State Department of Revenue, Property Tax Division Statistics and Reports: The Washington Department of Revenue publishes annual ratio studies tracking how county assessed values compare to sale prices by county and property stratum.
11. Washington State Board of Tax Appeals, BTA Filing Information: After a county BOE decision, taxpayers have 30 days to appeal to the Washington State Board of Tax Appeals; the residential filing fee is $25.