King County Property Assessor 2026: Search & Tax Records

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AssessorPropertySearch.org — King County WA Official Property Lookup Guide — Updated May 2026
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Official King County WA Sources — Free Lookup — May 2026

King County Property Records
Search by Address, Parcel Number, Condo Name, Tax Bill and Recorded Documents

Use King County Assessor’s official eReal Property search and King County Parcel Viewer to look up property records by address, parcel number or condominium/apartment complex name. This guide also shows when to use Treasury Operations for property tax payments, the Recorder’s Office for deeds, and the Board of Appeals and Equalization for valuation appeals.

Updated May 2026 Assessor: John Wilson Search: Address / Parcel / Condo Assessor phone: 206-296-7300 Tax due: Apr 30 / Oct 31
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Quick Answer
Where do I search King County property records?

Use the official King County eReal Property search for parcel/account information, assessed value, property characteristics, levy rates and sales history. Use King County Parcel Viewer when you need map-based search by address, parcel number or condo name. Use King County Property Taxes for payments and Recorder online records for deeds and recorded documents.

Start Address Steps Which Office?
Fast Path Address Search Parcel Number Condo Search Record Details Tax Bill Parcel Viewer Appeal Exemptions Office Router Problems Related Guides Official Links FAQ
First-Screen Search Tool

What Should You Click First for a King County Assessor Property Search?

King County property research works best when you choose the right official tool first. Use eReal Property for assessment information, Parcel Viewer for map search, Treasury Operations for tax payments, and Recorder’s Office records for deeds, mortgages, plats and surveys.

I have a street address

Start with eReal Property or Parcel Viewer. Address search is best for Seattle, Bellevue, Redmond, Renton, Kent, Kirkland, Shoreline, Federal Way, Auburn, Issaquah, Sammamish and unincorporated King County homes.

Open eReal Property

I have a parcel number

Use eReal Property directly when you know the parcel or property tax account number. Parcel search is more accurate than guessing the address format.

Search by parcel

I need map boundaries or condo context

Use Parcel Viewer. You can search by address, parcel number or condo name, then open direct links to the eReal Property report and district/development reports.

Open Parcel Viewer

I need property tax bill or payment

Use King County Treasury Operations or the property tax payment portal. Assessor values property; Treasury handles tax bills, balances and payments.

Open tax payment portal

I disagree with assessed value

Review your valuation notice, gather evidence and file with the King County Board of Appeals and Equalization by July 1 or within 60 days of the value notice mailing date.

Open appeal instructions

I need deeds or recorded documents

Use King County Recorder online records. Most documents recorded on or after August 1, 1991 are available online.

Open recorded document search
What You Can Find

What Shows in a King County eReal Property Record

King County eReal Property reports are designed for assessment research. They can help users understand value, sale history, levy information and property characteristics, but they do not replace tax-payment records or recorded deeds.

1

Parcel number

The main identifier for exact King County property lookup.

2

Site address

Physical property address tied to the parcel record.

3

Jurisdiction

City or unincorporated area context for the property.

4

Assessed value

Value information used in the property tax process.

5

Property characteristics

Building, land, property type and assessment details.

6

Sales history

Sale history and comparable context where available.

7

Levy code/rates

Taxing district context connected to property tax calculations.

8

Map/report links

Parcel Viewer and Districts and Development Conditions report connections.

Do not treat the Assessor report as a title report: Use eReal Property for assessment research. Use Recorder records for deeds, mortgages, liens, plats and recorded ownership documents. Use a title company, attorney or surveyor for legal ownership and boundary questions.

Tax Records

King County Property Tax Records — Tax Bill, Balance, Payment and Due Dates

King County property taxes are handled by Treasury Operations, not by the Assessor. The Assessor values property. Treasury sends bills, receives payments, answers payment questions and manages tax-payment reminders.

View and pay property taxes

Use the King County Property Taxes payment portal for real property and personal property tax bills.

Open property tax portal

Annual due dates

King County property taxes are generally paid in two installments: first half due April 30 and second half due October 31. If taxes are under $50, full payment is due April 30.

Customer service

King County property tax customer service is listed at 206-263-2890 and PropertyTax.CustomerService@kingcounty.gov.

Payment plans

King County has a property tax payment plan program for delinquent real property homes, commercial businesses, land and mobile homes.

Open payment plans

Mortgage escrow tip: If a mortgage company pays taxes through escrow, still check your parcel before each due date. A tax bill being issued does not always mean the lender has already paid it.

Parcel Maps

King County Parcel Viewer — GIS Map, Address Search, Parcel Number Search and Development Reports

Use King County Parcel Viewer when you need map context. It lets users search by address, parcel number or condo name, zoom into the map, click a parcel and open direct report links.

Search by address or parcel

Parcel Viewer makes parcel search easier when text results are confusing. It is especially helpful for unincorporated areas, rural parcels, condos and boundary-adjacent properties.

Open Parcel Viewer

Click a parcel on the map

Zoom in far enough to see parcel boundaries, then click the parcel to get summary details and links to complete reports.

Open related reports

Selected parcel results can link to the Assessor’s eReal Property report and the Districts and Development Conditions report.

Know the limit

Parcel Viewer is a research map, not a legal boundary survey. Use recorded plats, surveys and licensed survey help for legal boundary decisions.

Assessment Appeal

King County Property Assessment Appeal — July 1 or 60 Days After Value Notice

If you disagree with your King County assessed value, review the eReal Property report and your valuation notice first. Appeals are handled by the King County Board of Appeals and Equalization, not by the tax payment portal.

1

Wait for your valuation notice

King County appeal guidance says you should wait until you receive your valuation notice before filing. The notice helps confirm the assessment year and deadline.

2

Confirm the filing deadline

Petitions must be filed online or postmarked by July 1 of the assessment year or within 60 days after the mailing date printed on your valuation notice, whichever applies to your case.

3

Gather evidence, not opinions

Use comparable sales, appraisals, photos, incorrect property characteristics, condition problems, repair estimates and market evidence. “My taxes are high” is not enough evidence by itself.

4

File with the Board of Appeals and Equalization

The BOE hears property tax assessment appeals. The Assessor’s office may review your case, but the Board is the appeal route.

5

Keep paying attention to tax due dates

An assessment appeal does not automatically cancel your tax bill or pause penalties. Check payment obligations with Treasury Operations.

Need appeal instructions? Use the official King County Board of Appeals and Equalization property tax assessment appeal page.

Open Appeal Page
Tax Relief

King County Property Tax Exemptions — Senior, Disabled, Home Improvement, Open Space and Destroyed Property

King County exemption and tax relief programs have different eligibility rules, filing requirements and deadlines. Use the official Assessor and Tax Advisor resources before submitting documents.

Senior citizen and disabled exemptions

King County lists senior citizen and disabled exemption help through the Assessor’s Office. Related phone number: 206-296-3920.

Home improvement exemption

Some home improvements may qualify for temporary exemption treatment if they meet official requirements. Related phone number: 206-263-2338.

Farm, forest and open space

Current-use, open space and timber programs have special rules. Related phone numbers listed by King County include 206-263-2374 and 206-477-4643.

Destroyed property

If a structure was destroyed or damaged, review the official destroyed property exemption route. Related phone number: 206-263-2332.

Do not rely on old eligibility numbers: Income thresholds, deadlines, forms and supporting documents can change. Verify the current year requirements through King County and Washington Department of Revenue before applying.

Which Office You Need

King County Assessor vs Treasury vs Recorder — Which Office Handles Your Property Question?

Most King County property search frustration comes from asking the right question in the wrong office. Use this routing section before calling or emailing.

King County Assessor

Use for property value, eReal Property reports, parcel assessment data, valuation notices, exemptions, appraised value questions and property characteristics. Phone: 206-296-7300.

Treasury Operations

Use for tax bills, balances, payments, reminders, payment plans and property tax customer service. Property Tax Customer Service: 206-263-2890.

Recorder’s Office

Use for deeds, mortgages, real estate documents, plats, surveys, document recording and copies. Recorder phone listed by King County property tax advisor resources: 206-296-1570.

Board of Appeals and Equalization

Use for formal assessment appeals after reviewing your valuation notice and evidence. Board phone listed by King County property-tax phone resources: 206-477-3400.

Troubleshooting

Common Problems When Searching King County Property Records

No-result searches and wrong records are usually caused by address formatting, condo/unit complexity, wrong King County, wrong office, or trying to use assessor records as deed records.

1

Address search returns no result

Remove unit number, city, ZIP, punctuation, direction and suffix. Search only the street name or open Parcel Viewer and search visually.

2

Condo unit does not appear

Search by condo or apartment complex name in Parcel Viewer, then click the specific unit parcel number if a unit list appears.

3

Tax bill does not match assessed value

Assessed value is only one input. Levy rates, taxing districts, exemptions, voter-approved measures and payment status affect the tax bill.

4

You need ownership history

Use Recorder records. eReal Property helps identify the parcel, but deeds and recorded documents create the public record of ownership changes.

5

You found King County Texas or Kings County California

This guide is for King County, Washington. Do not confuse it with King County Appraisal District in Texas or Kings County, California assessor records.

Office Location

King County Assessor Office Location, Phone and Map

King County Assessor public contact information lists the King Street Center Customer Service Center for in-person visits. Always verify current hours and service availability before visiting.

King County Assessor — King Street Center Customer Service Center

201 South Jackson Street, 2nd Floor, Seattle, WA 98104

Assessor: John Wilson
Phone: 206-296-7300
Email: Assessor.Info@KingCounty.gov
Visit: King Street Center Customer Service Center, 201 South Jackson Street, 2nd floor, Seattle, WA 98104
Hours listed by King County: Monday through Friday, 8:30 a.m. to 4:30 p.m.

Smart Internal Links

Related Property Search Guides That Actually Help King County Users

These links are selected by property-search intent, not stuffed randomly. Use them when comparing another Washington county, a nearby assessor workflow, or a large-county property-record system.

Pierce County Assessor Property Search

Useful for Tacoma-area property owners who need another Washington county parcel, tax and assessor workflow.

https://assessorpropertysearch.org/pierce-county-assessor-property-search/

Spokane Assessor Property Search

Good comparison for users who want a Washington county assessor portal, GIS map and tax-office routing example.

https://assessorpropertysearch.org/spokane-assessor-property-search/

Whatcom County Assessor Property Search

Helpful for northern Washington parcel research, tax value lookup and county assessment search workflow.

https://assessorpropertysearch.org/whatcom-county-assessor-property-search/

Skagit County Assessor Property Search

Useful for comparing rural land, parcel maps and assessor search workflows inside Washington.

https://assessorpropertysearch.org/skagit-county-assessor-property-search/

Los Angeles County Assessor Property Search

Large-county comparison for assessor, tax collector and recorder routing.

https://assessorpropertysearch.org/los-angeles-county-assessor-property-search/

Dallas County Assessor Property Search

Helpful for comparing assessor/appraisal district, tax office and deed-record separation in a large metro county.

https://assessorpropertysearch.org/dallas-county-assessor-property-search/
FAQ

FAQ — King County Assessor Property Search

These answers cover the most common King County property lookup problems: address search, parcel number, condo units, tax bills, recorded documents, exemptions, appeals and wrong-office confusion.

The official King County Assessor property search is eReal Property at https://blue.kingcounty.com/Assessor/eRealProperty/default.aspx. It helps users find property information by parcel/account details and related property data.
Yes. Use eReal Property or King County Parcel Viewer. If a full address fails, remove unit numbers, punctuation, direction, street suffix, city and ZIP Code, then try a simpler street-number and street-name search.
Yes. Parcel number search is one of the best ways to find an exact King County property record. Use the parcel number from eReal Property, a tax bill, Parcel Viewer, a valuation notice or recorded documents.
Yes. King County property research resources support search by condo or apartment complex name. Parcel Viewer can help identify individual condominium unit parcels when an address search is confusing.
Use King County Treasury Operations or the official property tax payment portal at https://payment.kingcounty.gov/Home/Index?app=PropertyTaxes. The Assessor values property, but Treasury handles payments and tax customer service.
King County property taxes are generally due in two installments: first half on April 30 and second half on October 31. If a due date falls on a weekend or King County holiday, verify the current next-business-day rule with King County Treasury.
File with the King County Board of Appeals and Equalization. The petition must be filed online or postmarked by July 1 of the assessment year or within 60 days after the mailing date printed on the valuation notice. Always verify your exact deadline on the official appeal page.
Use King County Recorder online records. Most documents recorded on or after August 1, 1991 are available online. Older documents may require King County Archives or other official record-copy routes.
No. Parcel Viewer is useful for public property research and map context, but it is not a legal boundary survey, title report or permit approval. Use recorded surveys, plats and licensed survey help for legal boundary decisions.
The official King County Assessor page lists John Wilson as King County Assessor. The Assessor’s office phone number is 206-296-7300 and the public service location is King Street Center Customer Service Center, 201 South Jackson Street, 2nd floor, Seattle, WA 98104.

Disclaimer and Source Verification

AssessorPropertySearch.org is an independent property records information guide. We are not King County, the King County Assessor, Treasury Operations, the Recorder’s Office, the Board of Appeals and Equalization, or any government agency. We do not store property records and we do not provide legal, tax, appraisal, survey, title or consumer-report advice.

This page explains how to use official King County, Washington property record resources. Property data, tax balances, due dates, payment rules, exemption requirements, appeal deadlines, office hours, phone numbers and portal URLs can change. Always verify the final record, deadline, amount and filing instruction directly with the official county office before making financial, legal, tax or real estate decisions.

Official Sources Verified — May 2026

Property Search Smart Helper

Find the Right Property Record, Tax Bill, Deed or Assessor Search Route

Use this helper before searching county property records. It helps you choose the right office, prepare the right details, avoid wrong-office mistakes, and review property records safely.

Official-source focused Use county assessor, appraiser, auditor, tax collector, treasurer, recorder, clerk, GIS and appeal resources where available.
Not legal or tax advice Always confirm values, taxes, deeds, exemptions, appeals and deadlines with the official county office.
Works across states Designed for APN, PIN, parcel number, STRAP, folio, account number, GIS map and deed-record searches.

Property Search Route Finder

Choose what you have and what you want to find. The tool will suggest the best search route and common mistake to avoid.

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Parcel / APN / PIN Format Helper

Parcel numbers are formatted differently by county. Try these variations if your official search does not return results.

This tool does not send or store your entry. It only creates search-format ideas on this page.
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Assessor, Tax Collector, Recorder or GIS?

Select your issue and this tool will show the office that usually handles it.

Choose an option above
This finder helps prevent wrong-office mistakes. Exact office names vary by state and county.

Simple Property Tax Estimate Helper

This is a general estimate only. State and county tax rules differ, so always verify final bills with the official tax collector, treasurer or county tax office.

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Exemption / Appeal Readiness Checklist

Use this before applying for an exemption or challenging a value. Missing proof is one of the biggest reasons users waste time or miss deadlines.

Property Record Review Checklist

Review these fields before relying on any assessor, appraiser, auditor, property appraiser, tax or deed record.

Official-source and accuracy note: This helper is for educational use only. Property values, tax bills, deeds, exemptions, GIS boundaries and appeal deadlines can change. Always confirm final information with the official county assessor/appraiser/auditor, tax collector/treasurer, recorder/clerk, GIS office or appeal board.