King County Washington Property Records Guide
Search King County WA Property Values, Parcel Maps, Taxes and Recorded Deeds
King County property research uses several official systems. The Department of Assessments maintains appraised values, parcel characteristics, sale history, levy information and tax-relief programs. Treasury Operations issues and collects real and personal property taxes. The GIS Center provides Parcel Viewer and district reports, while the Recorder’s Office maintains deeds, mortgages, liens, plats and surveys.
This 2026 guide explains how to search eReal Property, identify the correct parcel number, read land and improvement values, open map and development-condition reports, verify tax charges, calculate the appeal deadline, apply for relief and find recorded documents without confusing an assessment record with legal title, zoning approval or a boundary survey.
Search by address, parcel or condominium name
Decode value, levy and sale-history fields
Pay county taxes without duplicate-payment errors
Prepare appeals, exemptions and damage claims
King County Assessor
John Wilson
Assessor information
206-296-7300
Treasury customer service
206-263-2890
Customer Service Center
201 S. Jackson St., Seattle
Editorial verification
August 6, 2026
August 2026 King County Assessment and Tax Status
The standard July 1 appeal date has passed, but many 2026 appeals may still be timely. King County mails valuation notices between May and November. The filing deadline is the later of July 1 or 60 calendar days after the mailing date printed on the valuation notice.
Received a recent value notice
Add 60 calendar days to the notice mailing date and compare that date with July 1. Use the later deadline and do not wait for a tax bill.
First-half tax was not paid
The first half became delinquent after April 30. Search the live Treasury account because late charges accrue monthly.
Second-half payment remains
October 31, 2026 falls on a Saturday. King County’s next-business-day rule points to Monday, November 2, 2026 for a timely second-half payment.
Limited-income deferral deadline: The annual application deadline is September 1. The program generally requires the first-half tax to be paid before an owner applies to defer the second installment.
Do not appeal the tax bill: A valuation appeal challenges the Assessor’s determination of true and fair market value. Questions about payment posting, delinquent charges or a missing statement belong with Treasury Operations.
Assessor, Treasury, GIS and Recorder Responsibilities
Department of Assessments
- eReal Property records
- Land and improvement values
- Property characteristics
- Sales and levy information
- Senior and disability relief
- Valuation reviews and notices
Treasury Operations
- Tax bills and statements
- Balances and payment posting
- Online, mail and counter payments
- Delinquent late charges
- Payment plans
- Foreclosure and personal-property tax
GIS and Recorder
- Parcel Viewer and iMap
- District and development reports
- Deeds and mortgages
- Liens, plats and surveys
- Recorded-document copies
- Recording activity alerts
Important distinction: The Assessor does not collect the tax bill. Treasury does not set market value. GIS parcel lines are not a certified survey, and the Recorder does not determine whether a document is legally correct or whether title is clear.
Washington and Florida use different office structures: King County uses an Assessor and Treasury Operations. Florida commonly separates a Property Appraiser and Tax Collector. See the existing Volusia County Property Appraiser and tax-inquiry guide for a practical cross-state comparison.
Choose the King County Property Task You Need
Find a property record
Search eReal Property by address, parcel number or condominium and apartment-complex name.
Read assessed value
Compare land value, improvement value, total value, property characteristics, sales and levy information.
Find or pay a tax bill
Use the 10- or 12-digit real-property account or the 8-digit personal-property account without dashes.
Check parcel maps and districts
Open Parcel Viewer, eMap, iMap or the Districts and Development Conditions report.
Challenge a valuation
Verify the notice date, prepare evidence and file by the later of July 1 or 60 days after mailing.
Find a deed, mortgage or lien
Use the Recorder’s Landmark search by name, document, parcel, recording date or legal description.
Jump to Your King County Property Task
How to Search King County eReal Property Records
Open the official eReal Property system.
Use King County eReal Property.
Select the search method that matches your information.
Search by property address, 10-digit parcel number or condominium/apartment complex name.
Use a short address first.
Enter the street number and main street name. Remove unit text, punctuation, directions or road suffixes when the exact address fails.
Use the parcel number for the cleanest match.
Copy the first 10 digits from a valuation notice, tax statement, Parcel Viewer result or recorded document.
Open the correct parcel detail.
Match the site address, taxpayer or owner information, legal description, jurisdiction and parcel number.
Review Property Detail.
Check parcel data, value history, sale history, levy rate, tax links and report links.
Open Land Data and Building Information.
Verify land size, present use, utilities, building count, finished square footage, age and other improvement details.
Follow the tax and map links.
Use the property page to open the current tax bill, map, area report and district-condition information.
Save a dated copy.
Print or save the property detail before appealing, applying for relief, checking a deed or reporting an error.
Address
Best for a known home.
Parcel
Best for exact matching.
Condo
Find unit or complex records.
Value
Review land and improvement.
Sales
Check transfer history.
Levy
Identify rate and districts.
Search shortcut: Address → copy 10-digit parcel → open property detail → verify values → open tax bill → open map and recorded documents.
How to Read a King County Assessor Property Record
Parcel number
The 10-digit Assessor parcel identifier used to connect eReal Property, Parcel Viewer, eMap, taxes and many recorded documents.
Tax account number
Real-property tax accounts normally contain 10 or 12 digits. Payment searches should be entered without dashes.
Taxpayer or owner
The name maintained for assessment and tax purposes. It does not by itself establish complete legal title.
Jurisdiction
The city or unincorporated area connected to the parcel. This affects taxing districts and permitting routes.
Legal description
A shortened assessment description. Review the recorded deed, plat or survey for complete legal language.
Levy code
A code grouping the taxing districts that apply to the parcel.
Present use
The use shown for assessment purposes. It may differ from legal zoning or a permitted development use.
Area report
The Assessor’s appraisal-area report describing market analysis, neighborhood characteristics and valuation practices.
Sale history
Recorded or reported transfer information. Review whether a sale is arm’s length before using it as evidence.
Land value
Assessor estimate assigned to the land component.
Review size, location, access and site characteristics.
Improvement value
Value assigned to buildings and taxable improvements.
Check size, year, grade, condition and building use.
Total assessed value
Land and improvement value used for the applicable assessment year.
This value generally affects the following year’s tax.
Levy and tax
Levy rates and other charges are applied according to location and taxing districts.
Value change and tax change are not automatically equal.
| Property characteristic | What to verify | Evidence when incorrect |
|---|---|---|
| Land area | Parcel acreage, lot size and legal configuration. | Survey, recorded plat or deed. |
| Finished living area | Usable finished area rather than garage, unfinished basement or open porch space. | Floor plan, appraisal, permit or measured sketch. |
| Year built | Original construction and major reconstruction dates. | Permit, historic record or construction document. |
| Condition and quality | Physical condition, deferred maintenance and construction quality. | Dated photographs, inspection and repair estimates. |
| Building count | Residence, accessory buildings and taxable structures. | Site plan, permit, demolition record or photograph. |
| Sale record | Sale date, consideration and whether the transaction was arm’s length. | Recorded deed, excise-tax affidavit or closing statement. |
Use limitation: An Assessor property record is useful for tax research, but it is not a title insurance report, legal survey, zoning approval, building permit or guarantee that all improvements are lawful.
eReal Property, eSales, Localscape and District Reports
eReal Property
Start here for parcel details, values, characteristics, levy rates, sale history and direct tax or map links.
eSales
Search residential or commercial sales when preparing market research or appeal evidence.
Localscape
Explore assessed values, area sales, census information, permits and tax-transparency data by parcel, city, ZIP code or district.
Districts and Conditions
Review planning, electoral, administrative, service and development-condition information connected to a parcel.
Open Assessor Lookup Tools
Access eReal Property, eSales, eMap, eValuations and downloadable assessment data.
Open Localscape Information
Review the Assessor’s tax-transparency and neighborhood-data tool.
Open Property Research Resources
Compare eReal Property with map and development-condition reports.
How to Use King County Parcel Viewer, eMap and iMap
Open Parcel Viewer for a visual search.
Search by address or parcel number, or zoom to a location and select the parcel.
Copy the 10-digit parcel number.
Use the selected parcel’s link to open the Assessor eReal Property report.
Open the Districts and Development Conditions report.
Review jurisdiction, planning and administrative information tied to the selected parcel.
Use iMap for deeper spatial research.
Review available environmental, service, planning and infrastructure layers.
Confirm whether the property is inside a city.
A parcel inside Seattle, Bellevue, Kent, Renton or another incorporated city may use that city’s planning and permitting rules rather than unincorporated King County rules.
Independently verify boundaries and restrictions.
Use recorded plats, title documents, surveys and the responsible permitting jurisdiction before development or purchase.
Map warning: Online parcel boundaries are reference information. They can be offset from fences, buildings or imagery and should not replace a professional survey.
King County 2026 Property-Tax and Assessed-Value Picture
Countywide property taxes
King County reports an approximately $770 million, or 10%, countywide increase for the 2026 tax year.
Countywide assessed property value
The published countywide assessed-value increase is approximately 5.4%.
20%
Approximate county share
King County says about 20% of a typical property-tax payment funds county services such as roads, criminal justice and public health.
Most taxes support several jurisdictions
Statements can include the state, county, city, school, fire, hospital, library, port or voter-approved measures.
Location changes the rate
Two similarly valued homes can have different bills because they sit in different levy codes and taxing districts.
Budget-based system: A 10% increase in assessed value does not automatically produce a 10% tax increase. The bill depends on government levy budgets, voter-approved measures, new construction, state rules and the property’s share of the taxable value within each district.
How a King County Property Tax Is Estimated
Assessed value
$900,000
Property’s taxable assessed value
÷
Rate unit
1,000
Washington levy rates are stated per $1,000
×
Combined levy rate
$9.50
Illustration only
Illustrative result: $900,000 ÷ 1,000 × $9.50 = $8,550. The actual levy rate must come from the correct King County parcel and levy code.
| Field | Meaning | Where to verify |
|---|---|---|
| Assessed value | Assessor’s true and fair market-value determination for the assessment year. | eReal Property and valuation notice. |
| Levy code | Combination of taxing districts applying to the parcel. | eReal Property and tax statement. |
| Levy rate | Combined rate per $1,000 of assessed value. | Current property report and levy-rate data. |
| Other charges | Non-ad-valorem amounts such as drainage, fire, conservation or weed charges when applicable. | Treasury tax statement. |
| Total due | Tax, applicable charges and any delinquent late charges. | Live Treasury account. |
How to Search and Pay King County Property Taxes
Find the tax account or parcel number.
Use the tax statement, valuation notice or eReal Property. Real-property accounts generally contain 10 or 12 digits.
Open the official Treasury payment portal.
Use the King County property-tax payment system.
Enter the number without dashes.
Personal-property accounts generally contain eight digits. Do not include the separate 4200 number printed on some personal-property statements.
Match the property and tax year.
Confirm the owner or taxpayer, location, account, first or second installment, other charges and delinquent years.
Select eCheck, card, mail or in-person payment.
Compare processor fees and proof available from each method.
Save the confirmation immediately.
Keep the account, amount, date, payment method, confirmation and bank or card record.
Allow the public account to update.
King County warns that the displayed property-tax record can take up to a week to reflect a payment.
Confirm successful bank processing.
A returned or rejected transaction can cause a previously displayed paid status to be reversed.
eCheck
Use an eligible personal or business checking account. Certain cashier, money-order, investment, credit-line and convenience checks are not accepted online.
Published fee: $0.55
Debit or credit card
The live 2026 portal states that debit and credit card payments are subject to a percentage-based processor charge.
2.35%, $2 minimum
Payment by mail
Make the check payable to King County Treasury, write the tax account number on the check and retain mailing proof.
201 S. Jackson St., Suite 710
In-person or drop box
Pay at the Customer Service Center or use the secure Treasury drop box during building-access hours. Never place cash in the drop box.
Monday–Friday, 8:30–4:30
No telephone payment
Treasury staff can explain the online process but do not process property-tax payments over the telephone.
Customer service: 206-263-2890
Mortgage escrow
The taxpayer remains responsible for confirming that the lender’s payment posted on time.
Prevent duplicate payment
eCheck
$0.55
Debit / credit card
2.35%
Minimum card fee
$2.00
Checkout controls: Processor terms can change. Review the live fee shown before authorizing payment rather than relying only on a saved article or previous transaction.
King County 2026 Property-Tax Calendar
First half due
If annual taxes are less than $50, the entire amount is due.
Late charges begin
Unpaid first-half taxes become delinquent and accrue monthly charges.
Base appeal date
The 60-day notice rule can create a later filing deadline.
Limited-income deferral
Annual applications are due.
Second-half statutory date
The date falls on Saturday in 2026.
Next business day
Monday is the practical 2026 deadline under the weekend rule.
First-half delinquency rule: When the first half is not paid by April 30, late charges are calculated against the full year’s tax. Second-half late charges are calculated against the unpaid second installment after its deadline.
Tax statement not received: Current-year statements are normally mailed in mid-February. Contact Treasury after March 1 when no statement has arrived, but do not wait for a replacement statement before checking the live account.
King County Property-Tax Payment Plans and Foreclosure Risk
King County offers written payment plans for qualifying delinquent prior-year real property, commercial property, land and mobile-home accounts.
Six- or twelve-month term
Tax, interest and statutory charges through the projected payoff date are divided into monthly payments.
Prior-year delinquency
The plan generally applies to delinquent prior-year taxes and cannot extend beyond the point at which the property becomes subject to foreclosure.
No late-charge forgiveness
State law does not permit King County to reduce delinquent charges merely because the owner enters a plan.
Month 1
Month 2
Month 3
Month 4
Month 5
Month 6
Month 7
Month 8
Month 9
Month 10
Month 11
Month 12
Plan costs and administration: Treasury’s FAQ describes a $100 setup charge for each plan plus monthly processing charges. Plans are administered through Evergreen Notes Servicing, and payments should reach the vendor by the fifth day of each month.
Foreclosure warning: A property that is three or more years delinquent may be subject to tax foreclosure. Contact the Foreclosure Unit at 206-263-2649 for the complete status and payoff.
“I am calling about King County tax account __________. Please confirm every delinquent year, current late charges, foreclosure status, whether a six- or twelve-month payment plan is available, the setup and monthly fees, and the amount required before an agreement can be approved.”
Open Official Payment-Plan Guidance
Review eligibility, plan administration, mortgage notification and contact instructions.
How to Appeal a 2026 King County Property Assessment
Calculate the filing deadline correctly
- Find the mailing date printed on the valuation notice.
- Add 60 calendar days.
- Compare that result with July 1 of the assessment year.
- Use the later date.
- File online, hand deliver or obtain a timely postmark.
The Board does not accept assessment petitions by ordinary email.
Verify the property record
Review land, buildings, use, area, sales and parcel characteristics in eReal Property.
Contact the Assessor
A factual correction may resolve the issue without a formal hearing when the resulting value is acceptable.
File with the Board
Submit a complete petition for each parcel through eAppeals or by mail.
Further state appeal
A party disagreeing with the Board order may appeal to the Washington State Board of Tax Appeals within 30 days of the order’s mailing.
A complete King County petition should include
- Assessor parcel number
- Taxpayer name and address
- Representative and power of attorney when applicable
- Property address, size, zoning and building description
- Assessor’s value
- Owner’s opinion of value
- Specific market-value reasons
- Taxpayer signature and date
- Copy of the valuation or determination notice
- Comparable sales and adjustment analysis
Arguments the Board cannot treat as market-value evidence: The percentage increase alone, personal financial hardship, the amount of tax owed or simple comparisons of another parcel’s assessed value do not establish the subject property’s true and fair market value.
Evidence timing: The Assessor sends its response at least 21 business days before the hearing. Evidence submissions must also be completed at least 21 business days before the hearing.
Open Appeal Instructions
Review deadlines, required petition fields, evidence and hearing procedures.
Open Assessor Appeal Hub
Access eAppeals and valuation-review resources.
Independent Tax Advisor
206-477-1060
taxadvisor@kingcounty.gov
Assistance with assessment appeals and property-tax questions.
taxadvisor@kingcounty.gov
Assistance with assessment appeals and property-tax questions.
“I received a King County valuation notice dated __________ for parcel __________. My filing deadline appears to be __________. The Assessor’s record shows __________, while my market evidence shows __________. Please confirm whether my petition is complete and how I should submit the evidence.”
King County 2026 Residential Physical Inspection Areas
Washington law requires the Assessor to physically inspect approximately one-sixth of county properties each year. King County says about 100,000 parcels are inspected annually, usually through an exterior observation.
Seattle inspection areas
Central District, Columbia City/Rainier Valley, Broadview/Blue Ridge/Shilshole and Roosevelt/Wedgwood/Bryant.
East and north areas
West Mercer Island, Bothell, Redmond/South Woodinville/Sammamish Valley and northwest Bellevue/Enatai/Meydenbauer/Beaux Arts.
South, rural and island areas
North Bend/Snoqualmie, Covington, Algona/Pacific/Lakeland Hills, Burien, Cumberland/Kanaskat and Vashon.
Field-identification rule: King County appraisers carry county identification and may use tablets or take exterior photographs. Staff generally knock first when additional access or information is needed.
King County Senior and Disabled Property-Tax Exemption
King County’s online portal lists a maximum household income of $84,000 for 2024, 2025 and 2026 exemption years after applicable qualified-expense deductions.
- Own and occupy the home, condominium, cooperative or qualifying mobile home.
- Use it as the principal residence for more than six months of the preceding year.
- Be at least age 61 by December 31 of the preceding year, or meet disability or qualifying disabled-veteran rules.
- A qualifying surviving spouse or registered domestic partner may be eligible under separate age and prior-exemption rules.
- Household income includes qualifying income of the applicant, spouse or domestic partner and resident co-owner.
Senior exemption
Age is measured by December 31 of the year before the requested exemption year.
Disability qualification
A qualifying disability or service-connected veteran disability can satisfy the age-or-disability requirement.
Prior-year refund
Separate applications may be submitted for qualifying prior years, subject to statutory refund deadlines.
Common application documents
- Proof of age or qualifying disability
- Proof of ownership and principal residence
- Federal income-tax return when filed
- Social Security and pension statements
- W-2, 1099 and investment income records
- Qualified medical or care expense documents
- Trust or co-ownership documentation
- Veteran disability documentation when applicable
Continue paying by the deadline: Applying for an exemption does not automatically suspend the current bill. If approved after payment, Treasury may issue an adjusted statement or applicable refund.
Open Senior Exemption Portal
Review qualifications, gather documents and submit an online application.
Download 2026 Forms
Find multilingual exemption, deferral and other Assessor forms.
Exemption assistance
206-296-3920
Exemptions.Assessments@kingcounty.gov
Exemptions.Assessments@kingcounty.gov
King County Limited-Income Property-Tax Deferral
Ownership requirement
Own the property for at least five years and live in the home as of January 1.
Occupancy requirement
Occupy the home for at least six months during the application year.
Income requirement
Prior-year annual household income must be $57,000 or less, subject to official program calculations.
How the program works: The applicant pays the first half by April 30 and applies by September 1 to defer the second installment. The Washington Department of Revenue pays 50% of the property taxes on the owner’s behalf, and the deferred amount plus interest becomes a lien on the property.
Annual reapplication: A limited-income deferral does not renew automatically. The owner must reapply each year and continue meeting income, occupancy, ownership and equity requirements.
Open Limited-Income Deferral Instructions
Review income, ownership, equity, payment and September 1 filing requirements.
King County Destroyed or Damaged Property Relief
Real or personal property may qualify when it is destroyed in whole or part, or lies in a qualifying declared natural-disaster area, and the property’s value falls by more than 20%.
- Involuntarily destroyed property can qualify for relief in the year of destruction.
- Voluntarily destroyed property generally receives relief in the following year.
- The Assessor determines the adjusted value and reduction.
- Treasury calculates the tax reduction or refund.
- A disagreement with the determination can be appealed within 60 days.
Damage-claim evidence checklist
- Parcel or personal-property account number
- Date and cause of damage
- Before-and-after photographs
- Fire department or incident report
- Insurance adjuster estimate
- Contractor repair or demolition estimates
- Description of destroyed improvements
- Owner contact and mailing information
2026 flood and storm relevance: King County promoted destroyed-property relief after recent flooding. Owners should document damage promptly rather than waiting for the next annual valuation notice.
Open Destroyed Property Relief
Review qualification rules, calculations, supporting documentation and the official claim form.
King County Personal Property Accounts and Listing Forms
Business personal property
Furniture, fixtures, machinery, equipment, supplies and materials used in business operations can be taxable personal property.
Mobile homes
A mobile home permanently attached to land owned by the same owner may be real property. A home in a park or on leased land can be billed as personal property.
Floating homes
Floating homes are generally billed and collected as personal property.
| Account type | Typical number | Search instruction |
|---|---|---|
| Real property | 10 or 12 digits | Enter without dashes in the Treasury payment search. |
| Personal property | 8 digits | Do not include the separate 4200 number shown on some statements. |
| Assessor parcel | 10 digits | Use for eReal Property, eMap, Parcel Viewer and many Recorder searches. |
First-half delinquent personal property: Before the second-half deadline, delinquent first-half real-property taxes can generally be paid online. Delinquent first-half personal-property taxes may require a mailed payment and an exact payoff from Treasury at 206-263-2844.
Listing deadline: King County’s 2026 calendar identifies April 30 as the personal-property listing-form deadline.
King County Home Improvement Exemption
A qualifying owner who adds rooms, a deck, patio or other physical improvements to a single-family residence may apply for a three-year exemption from taxes on the value of the qualifying physical improvement.
Define project
Identify qualifying improvements.
Apply early
File before completion.
Assessor review
Provide project information.
Value separated
Qualifying improvement is identified.
Three-year period
Tax benefit applies under program rules.
Timing controls eligibility: Applying after the construction is complete can cause the owner to lose the program opportunity.
Home Improvement Exemption contact
206-263-2338
How to Search King County Recorded Property Documents
Copy the 10-digit parcel number from eReal Property.
Parcel ID is useful for newer recorded documents but should not be the only search method.
Open the Recorder’s online records-search page.
Use the King County Recorder online records search.
Choose name, document, parcel or legal search.
Landmark also supports book/page, consideration, recording date, recording number, legal description and Torrens number.
Format a name search as Last, First.
The Recorder’s system uses a comma for grantor and grantee searches, unlike many assessor owner-search tools.
Use the first 10 parcel digits.
Parcel searches generally retrieve indexed records from 1997 forward, but parcel indexing was not always consistent.
Search several ways.
Use current and prior owner names, recording dates, legal descriptions and document types when one search returns no result.
Open the document details and image.
Compare parties, recording number, legal description, execution date and parcel references.
Order a certified copy when required.
Uncertified online copies can be printed immediately; certified online orders are mailed to preserve the official seal.
1991 to present
Images of most documents recorded on or after August 1, 1991 are available through the online system.
1976 to present index
Landmark includes an online recorded-document index, but image and indexing availability varies.
Older records
Documents before August 1991 may require King County Archives, and the 1853–1975 index is available through archival research.
Recording Activity Notification System: RANS is a free service that can email a subscriber when a land-record document matching a registered personal or business name is recorded.
Title warning: A public document search does not prove that every lien, easement, mortgage, judgment or ownership issue has been identified. Use a title company or attorney when legal or insured title confirmation is required.
King County Property-Research Scenarios
| User situation | Records to review | Best next action |
|---|---|---|
| Home buyer | eReal Property, Parcel Viewer, deed, tax bill, districts report and permit jurisdiction. | Verify title, survey, taxes and development conditions before relying on listing data. |
| Owner receiving a new value | Valuation notice, property characteristics, area report, eSales and comparable evidence. | Calculate the later of July 1 or 60 days from the notice date. |
| Mortgage escrow customer | Treasury account, lender disbursement, statement and payment posting. | Confirm lender payment before making a duplicate payment. |
| Senior or disabled homeowner | Ownership, occupancy, age or disability, income and current tax bill. | Apply for the exemption and continue paying by the published deadline. |
| Storm or fire damage | Parcel, incident date, reports, photos and repair estimates. | File destroyed-property relief promptly. |
| Business owner | Personal-property listing, 8-digit tax account, asset records and payment status. | Contact Assessments for listing questions and Treasury for the bill. |
| Boundary or development research | Parcel Viewer, districts report, zoning jurisdiction, recorded plat and survey. | Do not treat the online parcel line as legal boundary proof. |
| Deed-fraud concern | Landmark index, current deed, recent recordings and RANS registration. | Monitor recordings and obtain legal help when an unauthorized instrument appears. |
King County Property Search Problems and Practical Fixes
| Problem | Practical fix | Correct office or tool |
|---|---|---|
| Address search returns no property | Use street number and main street name, then remove unit, direction and suffix. | eReal Property |
| Several condominium records appear | Match the unit, parcel, legal description and taxpayer information. | eReal Property |
| Need the parcel but only have an address | Use Parcel Viewer or eReal Property, then copy the complete 10-digit parcel. | GIS / Assessor |
| Tax payment search rejects number | Remove dashes and confirm whether the number is a 10- or 12-digit real account or 8-digit personal account. | Treasury |
| Payment still does not show | Allow up to a week, verify bank processing and avoid submitting a duplicate transaction. | Treasury |
| First half is delinquent | Search the live account because monthly charges apply to the full-year tax amount. | Treasury |
| Valuation notice arrived after July 1 | File within 60 calendar days after the mailing date printed on the notice. | Board of Equalization |
| Building details are incorrect | Save the property report and provide permits, plans, photos, measurements or demolition records. | Department of Assessments |
| Parcel line conflicts with fence | Review the recorded plat and obtain a professional boundary survey. | Recorder / surveyor |
| Recorder search has no address field | Find the parcel number in Parcel Viewer, then search Landmark by parcel, owner or legal information. | Recorder |
| Older deed is not online | Use King County Archives for documents or index records outside current online image coverage. | County Archives |
| Exemption does not appear on bill | Contact Assessments at 206-296-3920 and continue following payment deadlines. | Assessments / Treasury |
| Need hardship extension | State law does not allow Treasury to grant an ordinary hardship extension; review relief, deferral or delinquent-plan options. | Assessments / Treasury |
| Property is three years delinquent | Contact the Foreclosure Unit immediately for the legal status and complete payoff. | Treasury Foreclosure Unit |
“I am researching King County parcel __________ and tax account __________. The property is located at __________. The record or notice shows __________, but my document shows __________. Please confirm which office controls this field and what proof I should submit.”
King County Assessor, Treasury, GIS and Recorder Contacts
Department of Assessments
201 S. Jackson St., 2nd Floor
Seattle, WA 98104
206-296-7300
Monday–Friday, 8:30 a.m.–4:30 p.m.
Seattle, WA 98104
206-296-7300
Monday–Friday, 8:30 a.m.–4:30 p.m.
Treasury Operations
201 S. Jackson St., Suite 710
Seattle, WA 98104
206-263-2890
Monday–Friday, 8:30 a.m.–4:30 p.m.
Seattle, WA 98104
206-263-2890
Monday–Friday, 8:30 a.m.–4:30 p.m.
Recorder’s Office
201 S. Jackson St., Suite 204
Seattle, WA 98104
206-477-6620
In person: 8:30 a.m.–4:30 p.m.
Seattle, WA 98104
206-477-6620
In person: 8:30 a.m.–4:30 p.m.
GIS Center
201 S. Jackson St.
Seattle, WA 98104
giscenter@kingcounty.gov
Seattle, WA 98104
giscenter@kingcounty.gov
Senior and disability relief
206-296-3920
Exemptions.Assessments@kingcounty.gov
Exemptions.Assessments@kingcounty.gov
Tax foreclosure
206-263-2649
TaxForeclosures@kingcounty.gov
TaxForeclosures@kingcounty.gov
Before visiting: Verify current office hours, holiday closures, security access and the correct floor or suite before traveling to King Street Center.
Final King County Property Action Center
Use these official routes after confirming the correct parcel, account, assessment year and responsible office.
Search Property Record
Prepare the address, parcel number or condominium name.
Search or Pay Tax Bill
Enter the tax account without dashes and confirm the year.
File Assessment Appeal
Confirm the later of July 1 or 60 days after notice.
Search Recorded Documents
Prepare names, parcel, recording date or document number.
King County Property Assessor Search and Tax Records FAQs
1. How do I search King County Assessor property records?
Use King County eReal Property. Search by property address, 10-digit parcel number or condominium and apartment-complex name. Open the matching property detail and verify the parcel, site address, land value, improvement value, sale history, levy information and tax link.
2. Can I search King County property records by owner name?
eReal Property is primarily organized around address, parcel and condominium searches. When researching ownership, begin with the parcel or address, then review taxpayer information and use the Recorder’s Landmark system for grantor and grantee document searches.
3. What is the difference between a King County parcel number and tax account number?
The Assessor parcel number is normally a 10-digit identifier used across property and map systems. Real-property tax accounts generally contain 10 or 12 digits, while personal-property accounts generally contain eight digits. Treasury searches should be entered without dashes.
4. When are King County property taxes due in 2026?
The first half was due April 30, 2026. The second-half statutory date is October 31, but that date falls on Saturday in 2026. Under King County’s next-business-day rule, Monday, November 2, 2026 is the practical timely-payment date.
5. What are the 2026 King County online property-tax payment fees?
The live 2026 payment portal states that debit and credit card payments carry a 2.35% processor fee with a $2 minimum. Published eCheck guidance lists a $0.55 fee. Review the live checkout screen before authorizing payment.
6. How long do I have to appeal a King County property assessment?
A petition must be filed by the later of July 1 of the assessment year or 60 calendar days after the mailing date printed on the valuation or determination notice. File a separate complete petition for each parcel.
7. What is the 2026 King County senior property-tax exemption income limit?
King County’s exemption portal lists a maximum household income of $84,000 for the 2026 exemption year after applicable qualified-expense deductions. The applicant must also meet ownership, occupancy, age, disability or qualifying veteran requirements.
8. Can King County extend a property-tax deadline because of hardship?
Treasury states that ordinary hardship extensions cannot be granted under state law. Depending on the situation, an owner may qualify for a senior or disability exemption, limited-income deferral, destroyed-property relief or a delinquent prior-year payment plan.
9. How do I search King County deeds, mortgages and liens?
Use the Recorder’s Landmark records search. Search by grantor or grantee name, document type, recording number, parcel ID, recording date, book and page, legal description or Torrens number. Search several ways because historical parcel indexing is not always complete.
10. Is the King County Parcel Viewer a legal survey?
No. Parcel Viewer and other GIS maps are useful for locating property and opening related reports, but online parcel lines are not certified legal boundaries. Use a recorded plat and professional boundary survey for legal or construction decisions.
Official Sources and Editorial Verification
King County Assessor
Property values, relief, reports, notices, forms and contact information.
eReal Property
Parcel details, values, characteristics, sales, levy rates and tax links.
2026 Property Taxes
Countywide tax figures, assessed value, measures and important dates.
Treasury Payment Portal
Current account lookup, payment routes and processor-fee notice.
Appeal Instructions
Filing deadline, petition requirements, evidence and hearing process.
Recorder Search
Deeds, mortgages, liens, plats, surveys, copies and search instructions.
What was reviewed: Current Assessor leadership, eReal Property, 2026 countywide tax information, Parcel Viewer, Localscape, physical inspection areas, payment dates and fees, payment plans, appeal procedures, senior and disability relief, limited-income deferral, destroyed-property relief, personal-property accounts, Recorder search and office contacts.
CountyPropertyAppraiser.org is an independent informational website. It is not affiliated with the King County Department of Assessments, Treasury Operations, GIS Center, Recorder’s Office, Board of Appeals and Equalization, Tax Advisor, Washington Department of Revenue or any King County taxing district.
Assessed values, tax accounts, levy rates, processor fees, deadlines, income limits, relief requirements, late charges, office hours and portal interfaces can change. Confirm time-sensitive information with the responsible official office before paying, filing, appealing, buying, selling, developing or recording property documents.
Last reviewed: August 6, 2026.
Slug: king-county-assessor-property-search