King County property records: what to do first
Answer: Use King County eReal Property to view valuations, property characteristics, levy rates and sale history. Treasury handles bills and payments, the Recorder handles real-estate documents, and the Board of Appeals and Equalization hears valuation appeals.
Who handles each task?
- Who maintains assessed values?
- King County Assessor.
- Where should I search the parcel?
- Use the official property-search portal linked on this page; match the account identifier, location and legal description.
- Where should I pay property tax?
- Use the verified tax collector or treasurer destination. This website never accepts payments.
- Where are deeds and liens searched?
- Use the verified recorder, clerk or land-record system—not the appraisal record as proof of title.
- Who changes an assessment?
- The assessment office or appeal body can change value; the payment office normally cannot.
Verified source: Official office ↗ · checked 2026-07-27.
Official King County Resource Map
For King County, these official links perform different jobs. Open King County Assessor for assessment questions, the listed collection office for bills and payments, and the recorder for deeds; one office normally cannot perform another office’s legal function.
| Task | Responsible resource | Verified destination |
|---|---|---|
| Assessment office | King County Assessor | kingcounty.gov ↗ |
| Property search | Official public property search | blue.kingcounty.com ↗ |
| Parcel/GIS map | Official map or parcel viewer | localscape.property ↗ |
| Exemptions | the assessment office exemption unit | kingcounty.gov ↗ |
| Assessment appeal | Appeal Instructions | kingcounty.gov ↗ |
| Tax bill and payment | the official tax collector or treasurer | payment.kingcounty.gov ↗ |
| Deeds and recorded documents | the official recorder or clerk | recordsearch.kingcounty.gov ↗ |
Verified source: Property search ↗ · checked 2026-07-27.
King County local search workflow
Verified source: Property search ↗ · checked 2026-07-27.
Search King County eReal Property
King County eReal Property provides valuations, property characteristics, levy rates and sale history. Localscape provides neighborhood and map context but is not a substitute for a parcel-level legal review.
- Search eReal Property by parcel or available property criteria.
- Confirm the parcel number, account, property characteristics and valuation year.
- Review sale history and levy-rate information.
- Use Treasury for tax statements and payment.
- Use the Recorder for deeds and recorded real-estate documents.
Verified source: Property search ↗ · checked 2026-07-27.
What the public record can and cannot establish
The Assessor record can show land and improvement values, sale history, legal description, property characteristics, levy rates and physical-inspection information.
An assessed-value record does not establish a surveyed boundary or guarantee that recorded documents, permits and property characteristics are fully synchronized.
Verified source: Property search ↗ · checked 2026-07-27.
Use the correct office
| Task | Responsible office | Best next step |
|---|---|---|
| Value, characteristics, sales, exemption or relief | King County Assessor | Use eReal Property or contact Assessor information. |
| Property-tax bill, payment or foreclosure | King County Treasury | Use official property-tax payment services. |
| Recorded deed or real-estate document | King County Recorder | Use Recorder services. |
| Valuation or exemption appeal | Board of Appeals and Equalization | File eAppeal or mail a petition by the deadline. |
Verified source: Office contact ↗ · checked 2026-07-27.
King County valuation, levies and tax changes
A change in assessed value does not create an equal percentage change in tax. The bill depends on the parcel value, total taxable value in the community, voter-approved measures and local-government budgets.
Assessor valuation notices are mailed during the assessment year for taxes paid in the following year. Review the assessment year and payable year before comparing records.
Verified source: Tax payment ↗ · checked 2026-07-27.
King County tax relief programs
The Assessor administers senior and disability exemptions and deferrals, destroyed-property relief, farm and agricultural classification, forest and open-space programs, historic-property treatment and nonprofit exemptions.
- Senior and disability assistance has a dedicated phone line.
- Destroyed-property relief addresses qualifying damage.
- Business equipment, floating homes and mobile homes are personal-property categories.
- A separate independent Property Tax Advisor helps owners prepare appeals.
Verified source: Exemption information ↗ · checked 2026-07-27.
King County valuation appeals
An appeal petition must be filed online or postmarked by July 1 of the assessment year or within 60 days of the valuation notice, whichever date applies later. The Board does not accept appeals by email.
Review property characteristics before filing. If the Assessor corrects an error and the owner agrees with the new value, a formal appeal may be unnecessary.
Verified source: Appeal information ↗ · checked 2026-07-27.
Property-tax bills and payments
King County property taxes are due in two halves: April 30 and October 31. A full-year delinquency can arise on May 1 when the first half is unpaid, and the second half becomes delinquent November 1.
Treasury customer service handles payment and billing at 206-263-2890. Do not provide financial information to the Assessor or an unofficial directory.
Verified source: Tax payment ↗ · checked 2026-07-27.
Deeds, ownership and recorded-document research
The Recorder’s Office maintains recorded real-estate documents and real-estate excise-tax functions. Use the Recorder or title research when legal ownership matters.
Verified source: Property search ↗ · checked 2026-07-27.
Common lookup problems
- Use the parcel-level due date shown in the property record or notice.
- An appeal sent by email is not accepted.
- An increase in value is not a dollar-for-dollar tax increase.
- Physical-inspection data and recorded documents can update separately.
- A property-tax advisor can help organize evidence but cannot reduce the value directly.
Verified source: Property search ↗ · checked 2026-07-27.
Buyer and homeowner checks
- Confirm the assessment and payable years.
- Review levy rates and voter-approved charges.
- Check current tax relief and whether the buyer will qualify.
- Search recorded documents and real-estate excise-tax history.
- Inspect physical characteristics and sale history before using comparables.
Verified source: Official office ↗ · checked 2026-07-27.
County-specific bottom line
King County pairs rich eReal Property data with a strict notice-based appeal deadline. Use Treasury and Recorder systems for bill and title tasks.
Verified source: Official office ↗ · checked 2026-07-27.
How to Verify the Exact King County Account
Start with the official search portal at blue.kingcounty.com. Begin with the identifier printed on the notice, bill or deed. If the first query fails, use the owner or street address and copy the identifier from the matched record instead of inventing a format.
- Confirm the situs or property location and do not confuse it with the owner’s mailing address.
- Match the legal description, subdivision, lot, block, survey, abstract or other local land identifier.
- Compare land area, property class and improvement description with the physical property.
- Check the valuation year and whether the amount is preliminary, current, certified or already billed.
- Open the map at localscape.property for location context, then rely on recorded documents and a survey for legal boundaries.
- Look for related real, personal, mineral, mobile-home or business accounts before assuming the search is complete.
Verified source: Property search ↗ · checked 2026-07-27.
Audit the King County Property Card Field by Field
When a field is wrong, report the exact field rather than asking the office to “fix the taxes.” Send King County Assessor the account number and evidence such as a recorded deed, survey, permit, demolition record, measurements, photographs or exemption approval. A tax collector can correct a payment posting but normally cannot alter these appraisal fields.
Verified source: Property search ↗ · checked 2026-07-27.
King County property-search FAQs
What is the King County appeal deadline?
July 1 of the assessment year or 60 days from the valuation notice, whichever applicable deadline is later.
Can I file an appeal by email?
No. File online through eAppeals or submit the petition by mail or approved delivery.
Are taxes due once or twice a year?
Twice: April 30 and October 31.
Does a 10% value increase mean a 10% tax increase?
No. The final tax also depends on levy rates, community taxable value and adopted budgets.
Who can help prepare an appeal?
The independent King County Property Tax Advisor can assist with evidence and process questions.
Which office changes the assessed value for a King County property?
King County Assessor handles valuation and property-characteristic corrections. the official tax collector or treasurer can explain or collect a bill but cannot change the assessment that produced it.
Where should I pay a King County property tax bill?
Use the verified King County tax-payment destination on this page for the responsible collector or treasurer. County Property Lookup does not accept payments or collect property-account, card or banking information.
Does the King County property card prove legal ownership?
No. The King County Assessor record is maintained for assessment administration. Use the recorder or clerk identified for King County and review the recorded deed chain for ownership, lien and title research.
What should I save after searching a King County property?
For a reproducible King County search, save the parcel or account identifier, selected tax year, complete property card, map or legal description, notice, source URL and access date. Keep tax-payment and appeal-filing confirmations as separate records.
Why can a King County property have more than one account?
King County Assessor may maintain separate King County accounts for land, improvements, business assets, manufactured homes, minerals or other interests. Match the legal description, situs information and account type before treating separate results as one property.
How do I correct an error in a King County property record?
Contact King County Assessor with the parcel/account number, the exact incorrect field and supporting documents. A deed error must be corrected through the official recorder or clerk, not the assessment office.
Can an online King County value be preliminary?
Yes. On the King County record, check the valuation year and whether the roll is preliminary, certified or already used for billing. Do not calculate a final tax bill from an unlabeled preliminary value.
King County sources and verification
Each King County field below was checked against the linked source. The checked date records this independent guide’s review; it does not mean King County Assessor or another public agency endorses County Property Lookup.
| Field | Status | Official destination | Checked |
|---|---|---|---|
| Official office | Official Verified | kingcounty.gov ↗ | 2026-07-27 |
| Office contact | Official Verified | kingcounty.gov ↗ | 2026-07-27 |
| Property search | Official Verified | blue.kingcounty.com ↗ | 2026-07-27 |
| Parcel/GIS map | Authorized Portal | localscape.property ↗ | 2026-07-27 |
| Tax payment | Official Verified | payment.kingcounty.gov ↗ | 2026-07-27 |
| Recorded documents | Official Verified | recordsearch.kingcounty.gov ↗ | 2026-07-27 |
| Appeal information | Official Verified | kingcounty.gov ↗ | 2026-07-27 |
| Exemption information | Official Verified | kingcounty.gov ↗ | 2026-07-27 |
Additional source pages
- King County Assessor ↗
- Assessor Contact ↗
- Appeal Instructions ↗
- Property Tax Payment ↗
- Property Tax Advisor ↗
Revision history
- Originally published
- 2026-07-27
- Content structure and GEO review
- 2026-07-28
- Last factual field review
- 2026-07-27
Report a change for King County: use the correction form and include the affected field, current value, requested correction and an official source URL.