Search King County, Washington property records online using official county tools for parcel number, property tax account number, owner and address research, assessed value, property characteristics, levy rates, sale history, tax bills, tax payments, deeds, mortgages, plats, official recorded documents, Parcel Viewer maps, iMap GIS layers and Seattle-area property research.
Need King County Washington Property Tax Records Right Now?
Use King County Assessor eReal Property when you need property value, property characteristics, levy rates, sale history, parcel number, tax account details and appraisal-related property information.
Use King County Treasury Operations when you need property tax bills, online tax payment, mailed payment instructions, drop box details or tax account payment status. Use King County Recorder’s Office when you need deeds, mortgages, plats, surveys, liens and official recorded documents.
Where to Search King County Property Records
King County property records are split between the Department of Assessments, Treasury Operations, Recorder’s Office and GIS mapping tools. Each source answers a different property question, so using the right official site saves time.
Use the Assessor/eReal Property for value, characteristics, levy rates and sale history. Use Treasury Operations for tax bills and payment. Use Recorder’s Office for deeds, mortgages, plats and other recorded documents. Use Parcel Viewer and iMap for parcel map context.
| What You Need | Official Source | Best Search Method |
|---|---|---|
| Property value, characteristics, levy rates and sale history | King County Assessor eReal Property | Search by property tax account or parcel number; use related property lookup tools where available. |
| Property tax bills and payment options | King County Property Taxes | Use online, mail, in-person or secure drop box payment guidance. |
| Online property tax payment | King County Property Tax Payment Portal | Search and pay real property or personal property tax bills through the official payment system. |
| Deeds, mortgages, plats and official recorded documents | King County Online Records Search | Use the free online database for official records, especially documents recorded on or after August 1, 1991. |
| Recorded document copies | Recorder Copy Requests | Request certified or uncertified copies from the Recorder’s Office. |
| Parcel map and GIS property context | King County Parcel Viewer | Search by address, parcel number, condo name or click a parcel on the map. |
Free King County Property Lookup Step-by-Step
The easiest free lookup starts with the King County Assessor’s eReal Property search or King County Parcel Viewer. If you only have an address, Parcel Viewer is very useful because it can search by address, parcel number or condo name and then link to the Assessor’s eReal Property report.
After you identify the correct parcel, save both the parcel number and tax account number. These details help you move through tax, recorded-document and GIS systems without matching the wrong property.
- Open eReal Property or Parcel Viewer Start with King County eReal Property or King County Parcel Viewer.
- Search with the best identifier Use parcel number or property tax account number if you have it. If not, use address or map search to identify the parcel.
- Open the correct property record Confirm address, parcel number, tax account number, property characteristics, assessed value, sale history and map location before relying on the record.
- Save key property numbers Copy the parcel number and tax account number into your research notes. Use them for Treasury, Recorder, GIS and office questions.
- Move to the correct second source Use Treasury Operations for tax bills and payment. Use Recorder’s Office for deeds, mortgages and plats. Use iMap or GIS Open Data for deeper mapping.
Search by Address, Parcel Number, Tax Account or Map
King County property lookup works best when you use the strongest identifier available. Parcel number and tax account number are more exact than owner or street address. Map search is helpful when the address is unclear or the property has multiple buildings, condos or lots.
Search by parcel number
Parcel number is one of the strongest ways to search King County property records. Use it when checking Assessor data, Parcel Viewer, iMap, official records clues and property tax information.
Search by property tax account number
Use the property tax account number when working with eReal Property, tax statements or Treasury payment records. It helps confirm that the tax bill and property record match.
Search by address
Address search is easiest for most users. If a full address does not work, simplify it by removing apartment number, punctuation, ZIP code or extra wording.
Search by condo name or map
Parcel Viewer supports condo-name style lookup and map clicking. This is useful for Seattle condos, mixed-use projects, apartment complexes, townhomes and properties where the street address does not point clearly to one parcel.
Assessor Records, Values, Levy Rates and Sale History
King County Assessor eReal Property is the official starting point for property value and information. The Assessor page says users can view valuations, property characteristics, levy rates and sale history through eReal Property.
Use Assessor records when your question is about assessed value, taxable value context, property characteristics, sale history, valuation notices, tax relief qualification, levy rates or whether the county record describes the property correctly.
| Property Record Field | What It Helps You Check | Why It Matters |
|---|---|---|
| Parcel number | Unique parcel identifier. | Best field for map, tax, Assessor and document cross-checking. |
| Tax account number | Tax-billing account connection. | Useful for tax statement and payment confirmation. |
| Property characteristics | Building, land and property details. | Incorrect details can affect valuation review. |
| Valuation details | Assessed value and property-value context. | Important for tax estimate and appeal preparation. |
| Levy rates | Tax-rate context tied to location and districts. | Helps explain why similar properties may have different taxes. |
| Sale history | Recent and prior sale information where available. | Useful for market comparison and value review. |
Property Tax Bills, Payments and Treasury Operations
King County Treasury Operations handles property tax payment and tax-bill services. The official property tax page lists several payment methods, including online, mail, in person and secure drop box.
The official payment portal allows real property and personal property tax payments. For 2026, the payment page lists processor service fees for card payments and eCheck payments, and states that King County does not receive any part of the service fee.
- Open King County property tax page Go to King County Property Taxes.
- Open the payment portal Use King County Property Tax Payment Portal.
- Search with parcel or tax account details Use parcel number or tax account number when possible. This reduces wrong-property mistakes.
- Verify before payment Confirm property address, parcel number, tax account, tax year, amount due, installment and payment method.
- Save confirmation Keep receipt or payment confirmation with parcel number, tax account number and tax year.
Deeds, Mortgages, Plats and Recorder’s Office Records
The King County Recorder’s Office records real estate deeds and mortgages, plats and surveys, and preserves and produces copies of recorded documents. The Recorder’s Office also collects real estate excise taxes.
Use Recorder’s Office records when you need deeds, mortgages, deeds of trust, plats, surveys, liens, releases, easements, covenants, real estate excise tax affidavits, copies or certified documents.
- Open online records search Go to King County Online Records Search.
- Open the Landmark search portal Use King County Official Records Search.
- Search by name and document clues Use grantor, grantee, buyer, seller, owner, lender, trust, LLC, estate, recording number, document type or recording date where available.
- Know the online date limit Most documents recorded on or after August 1, 1991 are available online. Older documents may require King County Archives.
- Request copies when needed Use Recorder Copy Requests for certified or uncertified copies.
Parcel Viewer, iMap, GIS Open Data and Map Research
King County Parcel Viewer makes parcel research easy because it can search by address, parcel number or condo name, or users can zoom in and click a parcel. After selecting a parcel, the tool provides direct links to the Assessor’s eReal Property report and the Districts and Development Conditions report.
King County iMap is a general interactive GIS tool for viewing spatial data and images. It can show real property, natural resources, political boundaries, planning layers and other county geographic data.
- Open Parcel Viewer Go to King County Parcel Viewer.
- Search or click a parcel Search by parcel number, address or condo name. You can also zoom in and click the parcel on the map.
- Use the linked property reports Open the eReal Property report and Districts and Development Conditions report from the selected parcel.
- Use iMap for deeper GIS layers Open King County iMap when you need broader GIS layers.
- Use GIS Open Data when needed Go to King County GIS Open Data for public GIS datasets.
Assessment Review, Tax Relief and Value Questions
If your King County property value or property characteristics look wrong, start with the Assessor’s eReal Property report. Review the parcel number, tax account, property characteristics, valuation details, sale history and levy-rate context.
Washington Department of Revenue explains that county assessors value property and county treasurers collect property tax. This means value and assessment questions generally start with the Assessor, while payment and tax-bill questions go to Treasury Operations.
- Open the eReal Property report Search by parcel number or tax account number and review the full property information.
- Find the exact issue Look for wrong square footage, wrong property characteristics, incorrect land data, sale mismatch, condition issue or tax relief question.
- Gather evidence Use photos, appraisals, comparable sales, repair estimates, closing documents or other proof showing the county record may be wrong.
- Contact the correct office Use Assessor for valuation and property data. Use Treasury for payment, tax statement and collection questions.
- Follow current appeal deadlines Use active-year Assessor notices and official King County guidance for appeal or review timing.
Seattle, Bellevue, Kent, Renton and Local Records
King County includes Seattle, Bellevue, Kent, Renton, Federal Way, Redmond, Kirkland, Auburn, Shoreline, Burien, Issaquah, Sammamish and many other cities. County records are the starting point for parcel number, property tax, assessment value and recorded documents.
City offices may still matter for permits, zoning, building records, code enforcement, utilities, sidewalk issues, short-term rental rules, local land use and development conditions. Use King County parcel tools first, then check the correct city system if the question is local.
| Question | Use King County? | Use City Office? |
|---|---|---|
| Parcel number, assessed value and property characteristics | Yes, use Assessor eReal Property. | Usually no for county assessment records. |
| Property tax bill and payment | Yes, use Treasury Operations. | Only if a city-specific bill, fee or local issue applies. |
| Deed, mortgage, plat or recorded document | Yes, use Recorder’s Office official records. | No for county-recorded real estate documents. |
| Permits, zoning, code, utility or local land use | Use county tools for parcel and district context. | Use Seattle, Bellevue, Kent, Renton or the correct city if inside city limits. |
Official Offices, Phone Numbers and Map
King County Downtown Seattle Government Offices
Official Website: King County Assessor
eReal Property: Look Up Property Information
Use this office/source for property valuations, characteristics, levy rates, sale history, tax relief and valuation notices.
King Street Center
201 South Jackson Street #710
Seattle, WA 98104
Property Tax Page: King County Property Taxes
Payment Portal: Pay Property Taxes
Property tax information phone listed by county: 206-263-2890
King County Recorder’s Office
Recorder’s Office: Official Recorder Page
Online Records Search: Online Records Search
Official Records Portal: Landmark Official Records Search
Copy Requests: Request Copies of Recorded Documents
King County GIS and Parcel Maps
Parcel Viewer: King County Parcel Viewer
Launch Parcel Viewer: Parcel Viewer Map
iMap: King County iMap
GIS Open Data: King County GIS Open Data
Buyer, Seller and Homeowner Checklist
Use this checklist before buying, selling, refinancing, appealing, paying taxes or researching a King County property.
King County Washington Property Research Checklist
- Search the property through King County eReal Property or Parcel Viewer.
- Save the parcel number, tax account number and property address.
- Review property characteristics, assessed value, levy rates and sale history.
- Use Treasury Operations for tax bill, payment options and tax statement questions.
- Use the official payment portal only after confirming parcel and tax account details.
- Use Recorder’s Office online records search for deeds, mortgages, plats, surveys and liens.
- Remember that most documents recorded on or after August 1, 1991 are available online.
- Use King County Archives for older recorded documents when required.
- Use Parcel Viewer and iMap for parcel map, district and development-condition context.
- Use city offices for permits, zoning, code, utility and local land-use issues.
- Do not use GIS parcel lines as legal boundary proof.
- Use title/legal professionals for title chain, easements, liens, foreclosure, estate or boundary issues.
Local Tips Most Guides Miss
- Start with Parcel Viewer when the address is messy: It can search by address, parcel number or condo name and link directly to eReal Property.
- Save both parcel number and tax account number: King County systems may use both, so keeping both avoids confusion.
- Use eReal Property for value data: It shows valuation, characteristics, levy rates and sale history.
- Recorder records are not the same as Assessor records: Deeds, mortgages, plats and surveys belong in Recorder’s Office records.
- Know the August 1, 1991 line: Most documents recorded after that date are online; older records may require King County Archives.
- Use RANS for recording alerts: The official records portal links to the Recording Activity Notification System.
- Payment fees are processor fees: King County’s payment page says the county does not receive service fees charged by the payment processor.
- Seattle questions may need city records: Building permits, code, zoning and utilities may be handled outside county property-tax systems.
- GIS is not a survey: Use recorded plats, legal descriptions and licensed surveyors for boundary decisions.
- Keep one research packet: Save eReal Property report, tax statement, Recorder document reference, Parcel Viewer map and payment confirmation together.
FAQ: King County Washington Property Records Search
How do I search King County Washington property records for free?
Use King County Assessor eReal Property or King County Parcel Viewer. You can search by parcel number, property tax account number, address, condo name or map selection depending on the tool.
Where can I find King County property value and sale history?
Use King County Assessor eReal Property. It provides property valuations, property characteristics, levy rates and sale history.
Where can I look up King County property tax bills?
Use King County Treasury Operations property tax resources and the official King County property tax payment portal. You will usually need the parcel number or tax account number to verify the correct bill.
Where can I pay King County property taxes online?
Use the official King County Property Tax Payment Portal. Verify parcel number, tax account, property address, tax year, amount and processor fees before submitting payment.
Where do I search King County deeds and mortgages?
Use King County Recorder’s Office Online Records Search or the Landmark Official Records Search portal. Most documents recorded on or after August 1, 1991 are available online.
What if a King County recorded document is older than August 1, 1991?
Older documents may be on microfilm and may require King County Archives. Use the Recorder’s Office and Archives guidance for older recorded-document research.
Where can I view King County parcel maps?
Use King County Parcel Viewer for parcel search and links to eReal Property reports. Use iMap for broader GIS layers and King County GIS Open Data for public datasets.
Are King County GIS parcel maps legal surveys?
No. GIS maps are research tools. For legal boundaries, easements, setbacks, lot lines or disputes, use recorded plats, legal descriptions, title work and a licensed surveyor.
Do Seattle and Bellevue properties use King County records?
Yes. County property assessment, tax and recorded-document research usually starts with King County tools. City offices may still be needed for permits, zoning, code, utilities or local land-use issues.
What is the safest way to research a King County property before buying?
Check eReal Property, Treasury tax status, Recorder’s Office records, Parcel Viewer, iMap and city permit or zoning records where applicable. For title risk, liens, deeds of trust, foreclosure, estate or boundary issues, use a title company, attorney or surveyor.