King County Washington Property Search, Assessor Records, Parcel Maps & Recorder Documents
Use this King County guide to search property records, find parcel numbers, open the Parcel Viewer, check Assessor eReal Property reports, pay property taxes, review 2026 tax due dates, search recorded deeds, request document copies and contact the correct official office.
🔒 Official King County Property, Tax, GIS & Recorder Resources
King County Auditor Search Intent: Use the Right Washington Office
Many users search “King County Auditor property search,” but King County, Washington routes property-related tasks through several official offices rather than one Ohio-style county auditor page.
Use the King County Assessor when you need property value, tax account, parcel number, property information, sales search or assessment details. Use Parcel Viewer when you need a map-based search by address, parcel number or map click.
Use Treasury Operations when your question is about property tax payment, billing, due dates, payment plans, foreclosure, refunds or personal property tax. Use the Recorder’s Office when you need deeds, mortgages, liens, easements, plats, surveys, official records or recorded document copies.
Homeowners
Use Parcel Viewer or eReal Property to find your parcel, then use Treasury for payment status, 2026 due dates and tax bills.
Buyers and agents
Check Assessor reports, sales search, Parcel Viewer, tax payment status and Recorder documents before relying on a property summary.
Researchers
Use GIS Open Data, Parcel Viewer, Recorder search and Archives resources when researching land history, recorded documents or older records.
King County Property Search by Address, Parcel Number, Tax Account or Map Click
King County Parcel Viewer makes parcel searching easy by address, parcel number or zooming into the map and clicking a parcel. The selected parcel links to Assessor eReal Property and other reports.
Common searches such as “King County property search,” “King County parcel lookup,” “King County Assessor property search,” “King County eReal Property,” and “King County parcel viewer” should start from official King County resources.
1
Open King County Parcel Viewer
Best when you know the address or want map context.
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Use Parcel Viewer when you want to search by property address, parcel number or visual map location. After selecting a parcel, open the Assessor report and other linked property tools.
Official page: King County Parcel Viewer
2
Use eReal Property when you know the account or parcel
Best for direct Assessor property information.
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Use the Assessor “Look up property information” page when you need eReal Property, sales search, assessments data or property information by parcel number or tax account.
Official page: Look up property information
3
Use property research resources for deeper context
Helpful for zoning, property reports and map layers.
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King County property research pages connect users to Parcel Viewer, eReal Property, GIS data and other property information tools. Use these links when a basic parcel result is not enough.
Official page: King County property research
4
Use Recorder search for deed proof
A parcel report is not a recorded document search.
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If your goal is a deed, mortgage, easement, lien, plat or recorded legal document, use the Recorder’s Office online records search separately.
Official page: King County Online Records Search
King County Assessor Records, eReal Property, Sales Search and Assessment Help
The King County Assessor is the right office for property valuation, assessments, property information reports, sales search and assessment-related public records.
| Assessor Task | Official Route | Helpful Note |
|---|---|---|
| Property report | eReal Property | Search by tax account or parcel number. |
| Parcel map lookup | Parcel Viewer app | Search by address, parcel number, condo name or map click. |
| Property sales | Assessor sales tools | Use eSales for residential or commercial property type search. |
| Assessment appeal date | 2026 property taxes | County lists July 1 as County Board of Equalization appeal due date. |
King County Parcel Viewer, GIS Map Layers and Open Data
King County Parcel Viewer is the main map-based tool for parcel-related information. It supports address search, parcel-number search, map click, selected parcel export and links to Assessor reports.
Parcel Viewer
Best for map-based parcel lookup, address search and visual property context.
GIS Open Data
Best for researchers, developers and users needing downloadable GIS datasets.
Boundary caution
Use parcel maps for research. For legal boundary questions, use surveys, recorded documents and professional review.
1
Search with Parcel Viewer
Address, parcel number, condo name or map click.
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Use Parcel Viewer when you need to locate a property visually or when you do not know the exact Assessor parcel number.
Official app: King County Parcel Viewer application
2
Use GIS Open Data for datasets
Useful for bulk research and mapping projects.
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Use King County GIS Open Data for public GIS datasets, including property and location-related data where available.
Official data: King County GIS Open Data
3
Do not treat a web map as a survey
Important for fences, easements and disputes.
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Parcel Viewer is excellent for public research, but legal boundary decisions should be based on recorded documents, surveys, plats, title work and qualified professional guidance.
King County Property Tax Payment, 2026 Due Dates, Fees and Treasury Help
King County Treasury Operations handles property tax billing, payment, customer service, payment plans, foreclosure questions and refunds. The Assessor does not collect taxes.
| Tax Task | Official Detail | Helpful Route |
|---|---|---|
| 2026 first-half due date | April 30, 2026 | 2026 property taxes |
| 2026 second-half due date | October 31, 2026 | 2026 property taxes |
| Pay online | Official King County payment portal | Property tax payment |
| Property tax customer service | 206-263-2890 | Treasury Operations |
| Personal property / mobile home / commercial | 206-263-2844 | Treasury Operations |
| Payment plan | PaymentPlans@kingcounty.gov or 206-263-2649 | Payment plans |
King County Recorder Search, Deeds, Mortgages, Liens, Plats and Document Copies
The King County Recorder’s Office records real estate documents, mortgages, plats, surveys, and other official records. Most documents recorded on or after August 1, 1991 are available online.
| Record Need | Official Route | Useful Note |
|---|---|---|
| Search online official records | Online records search | Most documents from Aug. 1, 1991 onward are online. |
| Direct Landmark search | Landmark official records | Use for official recorded document search. |
| Request copies | Recorded document copy requests | Copies can be requested by phone, mail or in person. |
| Older documents | Recorded documents in archives | Older records may require Archives or microfilm research. |
King County Assessor, Treasury, Recorder and GIS Contact Details
Use the correct office before calling or visiting. King County separates assessment, parcel maps, taxes and recorded documents into different official departments.
| Office / Resource | Official Detail | Best For |
|---|---|---|
| Assessor | King County Assessor | Property value, assessments, eReal Property, sales search and property information. |
| Parcel Viewer / GIS | Parcel Viewer | Map search by address, parcel number or map click. |
| Treasury property tax | 206-263-2890; PropertyTax.CustomerService@kingcounty.gov | Tax bills, payment, billing and real property tax questions. |
| Mobile home / personal / commercial property tax | 206-263-2844; Treasury.PersonalProperty@kingcounty.gov | Personal property, mobile home and commercial property tax questions. |
| Recorder’s Office | 201 S. Jackson St., Suite 204, Seattle, WA 98104; 206-477-6620 | Deeds, mortgages, liens, plats, surveys, recorded documents and document copies. |
| Recorder hours | In-person 8:30 a.m.-4:30 p.m. weekdays; recording ends 3:30 p.m.; phone hours 9 a.m.-2 p.m. | Planning an in-person visit or phone document request. |
Real-World Tips for King County Property Search, Maps, Taxes and Deeds
These tips help avoid failed searches, wrong-office calls, duplicate research, missed 2026 tax dates and confusion between parcel reports and recorded documents.
Start with Parcel Viewer when address is all you have
Parcel Viewer is easier when you do not know the parcel number. Click the parcel and then open Assessor reports from the linked results.
Use eReal Property for direct account research
If you already have the parcel or tax account number, eReal Property is usually faster than starting from a map.
Tax deadlines are separate from assessment appeals
For 2026, first-half taxes are due April 30 and second-half taxes are due October 31. Assessment appeal and tax payment are different workflows.
Use Recorder records for legal proof
Parcel Viewer and Assessor reports are research tools. For deeds, easements, mortgages and liens, search Recorder official records.
King County Auditor Property Search FAQs
These FAQs answer real search intent around King County property records, Assessor eReal Property, Parcel Viewer, GIS maps, tax payments, 2026 due dates and Recorder records.
Does King County WA have an Ohio-style county auditor property search?▾
No. In King County, property records are mainly handled by the Assessor, Parcel Viewer/GIS, Treasury Operations and Recorder’s Office.
Where can I search King County property records?▾
Use King County eReal Property for Assessor property information and Parcel Viewer for map-based property search.
Where can I view King County parcel maps?▾
Use the official King County Parcel Viewer application. You can search by parcel number, address, condo name or map click.
Where can I pay King County property taxes online?▾
Use the official King County property tax payment portal or start from the Treasury property tax page.
What are King County property tax due dates for 2026?▾
King County lists first-half 2026 property taxes due April 30 and second-half 2026 property taxes due October 31.
What is the King County property tax customer service phone number?▾
King County Treasury property tax customer service is 206-263-2890.
Where can I search King County deeds and official records?▾
Use the King County Online Records Search or the direct Landmark official records search.
What is the King County Recorder phone number?▾
The King County Recorder’s Office phone number is 206-477-6620.
Where is the King County Recorder’s Office located?▾
The King County Recorder’s Office is located at 201 S. Jackson St., Suite 204, Seattle, WA 98104.
Is OhioAuditors.org an official King County website?▾
No. OhioAuditors.org is an independent informational guide. Always confirm property records, tax bills, payment deadlines, maps and recorded documents on official King County websites.
Official King County Links Used in This Guide
Use these official resources to confirm King County property records, parcel maps, Assessor information, tax payment, 2026 due dates, GIS data, Recorder records and office contact details.
| Resource | Official Link | Use It For |
|---|---|---|
| Assessor | King County Assessor | Property value, assessments, eReal Property and sales search. |
| Property Information | Look up property information | eReal Property and Assessor property lookup. |
| Parcel Viewer | Parcel Viewer page | Property map search by address, parcel number or map click. |
| Parcel Viewer App | Parcel Viewer application | Direct map application. |
| GIS Open Data | GIS Open Data | Public GIS data and datasets. |
| Property Taxes | Treasury property tax page | Ways to pay and property tax information. |
| 2026 Property Taxes | 2026 property taxes | 2026 due dates and important property tax deadlines. |
| Online Tax Payment | Property tax payment | Pay property tax online. |
| Recorder | Recorder’s Office | Recorded documents, deeds, mortgages, plats and surveys. |
| Online Records Search | Online records search | Search official recorded documents. |