King County Property Records Search | Free Lookup

Where to Search King County Property Records

King County property records are divided between different official departments. The Assessor is the best source for property value and parcel information. Treasury Operations is the best source for property tax bills and payments.

The Recorder’s Office is the correct source for recorded land documents such as deeds, mortgages, plats, surveys, and other official recordings. Parcel Viewer and GIS tools are best when you want a map-based view of the property.

King County Property Records Free Lookup: Step-by-Step

The easiest free lookup usually starts with King County Parcel Viewer. It lets you search by address, parcel number, or condo name, then click the property and move into deeper county records.

For value and property characteristics, use the Assessor’s eReal Property report. For deeds, mortgages, plats, and surveys, use the Recorder’s online records search.

1. Open the official Parcel Viewer Go to King County Parcel Viewer. This is the county’s interactive parcel map.
2. Search by address, parcel number or condo name Enter the property address, parcel number, or condominium name. You can also zoom into the map and click the parcel directly.
3. Select the correct parcel Confirm the address, parcel number, map location, jurisdiction, and property summary before relying on the result.
4. Open the eReal Property report Use the linked Assessor eReal Property report to review assessment details, property characteristics, value information, and related property data.
5. Use the correct next official source Use Treasury for taxes and the Recorder’s Office for deeds, mortgages, plats, surveys, and official recorded documents.

How to Find a King County Parcel Number

The parcel number is the cleanest identifier for King County property research. It helps you avoid confusion when a property has a long address, unit number, condo name, or similar nearby street address.

Use the parcel number when checking the Assessor report, tax statements, property tax payments, property maps, and recorded document clues.

Best ways to find the parcel number

• Search the address in King County Parcel Viewer.
• Open the linked Assessor eReal Property report from the parcel result.
• Use the Look Up Property Information page.
• Check your King County property tax statement.
• Review your deed, closing statement, title policy, or escrow paperwork.

Assessment Records, Values and eReal Property

The King County Department of Assessments provides property value and information tools through eReal Property. This is the practical source for parcel/account information, valuation details, property characteristics, and assessment-related research.

Assessor records can help homeowners, buyers, appraisers, agents, lenders, attorneys, and researchers understand how a property appears in the county’s assessment system.

Property Tax Statements and Payments

King County Treasury Operations handles property taxes and provides ways to pay online, by mail, in person, and by secure drop box. Property taxes are generally paid in two installments.

To view a statement online, King County tax guidance says you need the tax account number or parcel number. Before paying, confirm the tax year, amount, parcel number, and whether you are paying the first half, second half, or a delinquent balance.

1. Open the official property tax page Go to King County Property Taxes.
2. Use the payment portal only from the county site Open King County Property Tax Payment when you are ready to pay online.
3. Search with parcel or tax account number Use the parcel number from Parcel Viewer or the account number from the Assessor/tax statement.
4. Review fees and payment method King County notes card and eCheck payments may have service fees charged by the payment processor.
5. Save proof of payment Keep the confirmation number, receipt, payment screenshot, bank record, or mailed-payment proof until the county record updates.

Search Deeds, Mortgages, Plats and Surveys

The King County Recorder’s Office records real estate deeds and mortgages, plats and surveys, and other recorded documents. This is the correct source when you need official recorded land documents instead of assessment or tax information.

The Recorder’s online records search provides access to King County official records. Most documents recorded on or after August 1, 1991 are available online, while older documents may require Archives assistance.

1. Open the Recorder online records search Go to King County Online Records Search.
2. Use Landmark Web for official record images Open King County Landmark Web to search recorded documents.
3. Search with names, recording number or date clues Use grantor/grantee names, recording date range, document type, or known recording number when available.
4. Confirm the document type Look carefully for deeds, mortgages, plats, surveys, easements, releases, liens, or other relevant record types.
5. Order certified copies only when needed For legal, title, court, lender, or official use, use the Recorder’s certified copy process instead of relying only on an online image.

Recorded Document Copies and Older Records

King County online records are helpful for recent documents, but older records can work differently. The county explains that most documents recorded on or after August 1, 1991 are available online.

Documents recorded before that date may be on microfilm or handled through King County Archives. If you are researching an older deed chain, do not stop at the online portal if the record is not visible.

Parcel Viewer, GIS Maps and Property Research

King County Parcel Viewer is one of the most useful tools for property research because it connects map search with Assessor and district information. You can search by address, parcel number, or condo name, then click a parcel for summary details and links.

GIS maps are helpful for research, but they are not legal surveys. Use recorded documents, plats, surveys, title records, and professional survey work for legal boundary questions.

1. Open Parcel Viewer Use King County Parcel Viewer.
2. Search or click the property Enter an address, parcel number, or condo name. You can also zoom in and click a parcel.
3. Use the summary links Open the eReal Property report and other available property information links from the parcel result.
4. Use property research resources Review King County Property Research and GIS tools if you need deeper map context.

Sales, Valuation Notices and Comparable Research

King County Assessor tools can help you review property value and sale-related information. This is useful when you are checking market value, looking for comparable properties, or reviewing a valuation notice.

Use Assessor tools such as eReal Property and eSales for research, then compare any findings with your own property details, market evidence, and official valuation notice.

Assessment Questions and Appeals

If you believe a King County property value or characteristic is wrong, start with the Assessor record. Print or save the eReal Property report and note the exact issue before contacting the Department of Assessments.

Appeal and review rules can change by year and deadline. Always use current King County Assessor instructions and do not rely on old copied forms from third-party websites.

1. Review the eReal Property report Check parcel number, account details, property characteristics, value information, and sales clues.
2. Collect evidence Useful support may include comparable sales, photos, appraisal reports, correction evidence, permit history, or building detail errors.
3. Contact the Assessor if needed Use the official Department of Assessments contact information for value, characteristic, and property information questions.
4. Check current appeal instructions Use official county or board instructions for appeal forms, deadlines, and filing process.

Archives and Historical Property Documents

Historical property research can require more than one office. Recent recorded documents may be online through the Recorder, but older records can require King County Archives.

If you are researching ownership history, historic deeds, older plats, land transactions, or a pre-1991 property document, use the county’s Archives guidance and Recorder resources together.

1. Start with the current parcel Find the parcel number, address, and legal clues using Parcel Viewer and eReal Property.
2. Search recent recorded documents first Use Landmark Web for online official records.
3. Use Archives for older documents Open King County Archives Recorded Documents if the document is older or not available online.
4. Track names and recording references Build a chain using grantor/grantee names, recording numbers, dates, and legal descriptions.

Office Address, Phone Numbers and Map

King County Department of Assessments

King County Recorder’s Office

King County Treasury Operations

Buyer and Homeowner Checklist

Use this checklist before buying, selling, refinancing, appealing, paying taxes, researching title history, or checking a King County property.

Local Tips Most Guides Miss

1. Use Parcel Viewer first when you only know the address: It gives map context and links to deeper Assessor records.
2. Do not confuse parcel number and tax account number: Both can be useful, but copy them exactly from county records.
3. Use eReal Property for value questions: The Recorder does not decide your assessed value.
4. Use Treasury for payment questions: The Assessor record is not the payment portal.
5. Use the Recorder for legal documents: Deeds, mortgages, plats, and surveys are recorded document issues, not tax statement issues.
6. Check online coverage dates: Most documents recorded on or after August 1, 1991 are available online, while older records may require Archives.
7. Certified copies matter for official use: Online images may help research, but certified copies are safer for legal, lender, title, or court needs.
8. Watch service fees before paying online: King County notes card and eCheck service fees are charged by the payment processor.
9. Do not treat GIS maps as surveys: Use recorded plats, legal descriptions, and licensed surveyors for boundary decisions.
10. Save everything before closing: Buyers should keep the Assessor report, tax statement, deed record, and payment confirmation in one folder.

FAQ: King County Property Records Search