King County Treasury Payment, Parcel Lookup and Property Tax Rate Help
A practical King County property tax guide for homeowners, buyers and landlords who need to look up a tax statement, pay online, search by parcel number, review Assessor eReal Property, understand levy rates, check due dates, apply for senior or disabled tax relief, or search recorded documents.
🔒 Official King County Property Tax Resources
King County Property Tax Lookup, Treasury and Assessor Basics
King County property tax work is split between offices. Treasury Operations handles tax statements, payments, receipts and collection. The King County Assessor handles valuations, property characteristics, levy rate information, appeals support and tax relief programs.
For payment, start with the King County Property Taxes payment portal. For property value, parcel details, sale history, levy rate and property characteristics, start with Assessor eReal Property or Parcel Viewer. For deeds and recorded documents, use the Recorder’s online records search.
| Need | Best Official Place to Start | What You Can Do |
|---|---|---|
| Pay property tax | King County Property Taxes Portal | Search by account or parcel number, view balance and pay online. |
| View tax statement | King County Treasury Operations | Find property tax payment information and request or view statements. |
| Search property value | King County Assessor eReal Property | View valuations, characteristics, levy rates and sale history. |
| Search parcel map | King County Parcel Viewer | Search by address, parcel number or map zoom and open direct parcel reports. |
| Search recorded documents | King County Recorder | Search official records, including many records recorded after August 1, 1991. |
How to Search King County Property Tax by Parcel Number, Account Number or Address
The official King County property tax portal searches by tax account or parcel number. If you do not know the number, use Parcel Viewer or eReal Property to find it from an address.
1
Start with your tax account or parcel number
Best for direct tax bill lookup
Open the King County Property Taxes portal. Enter your tax account or parcel number without dashes. This is the most direct way to view tax payment information.
2
If you only have an address, use Parcel Viewer
Best for finding parcel details from a map or address
King County Parcel Viewer lets you search by address, parcel number or by zooming in on the map and clicking a parcel. After selecting a parcel, it links to Assessor eReal Property and other parcel-related reports.
3
Use eReal Property for valuation and levy rate details
Best for value, characteristics and sale history
Assessor eReal Property helps you view valuations, property characteristics, levy rates and sale history. It is useful when you want to understand why the bill changed.
4
Confirm the property before paying
Avoid wrong parcel or wrong-year payment
Before paying, compare parcel number, tax account number, situs address, owner mailing clue, tax year and payment status. King County has many condos, subdivisions and properties with similar addresses.
How to Pay a King County Property Tax Bill Online
King County provides several ways to pay property taxes, including online payment, mail, in person and secure drop box options. Online payment is usually the fastest route when you have your parcel or account number ready.
Online payment
Use the official King County payment portal and choose Property Taxes. Search by account or parcel number and confirm the amount due.
Mail, in person or drop box
Use King County Treasury payment instructions for mailed checks, in-person service, or secure drop box payment. Check deadlines and processing rules first.
1
Open the official King County payment portal
Start from King County, not ads or copied payment links
Go to King County’s official payment site and choose Property Taxes. Do not enter card or bank information through a random search ad, email link or third-party page unless it is clearly linked from King County.
2
Enter account or parcel number without dashes
The portal requests no dashes in the search field
Enter the property tax account or parcel number in the portal. If your parcel number is written with dashes on a document, remove the dashes before searching.
3
Choose first half, second half or full balance carefully
King County taxes are commonly split into two installments
Review whether you are paying the first-half amount, second-half amount, full-year amount, a delinquent balance, or personal property tax. Check payment status and year before submitting.
4
Save confirmation and recheck account
Important for escrow, sale and refinance questions
After payment, save the confirmation number, receipt, payment amount, parcel number, tax year and bank/card proof. Reopen the official account later to confirm the payment posted.
King County Property Tax Due Dates, Penalties and Installments
King County property taxes are usually paid in two installments. The first half is due April 30, and the second half is due October 31. If a due date falls on a weekend or King County holiday, taxes are due the next business day.
| Installment | Common Due Date | What to Do |
|---|---|---|
| First-half property tax | April 30 | Pay or confirm escrow payment before the deadline. |
| Second-half property tax | October 31 | Recheck the account even if the first half was paid. |
| Weekend or county holiday | Next business day | Confirm the current official deadline before waiting. |
| Delinquent or prior-year taxes | Varies by account | Review penalties, interest and payment history in the official account. |
King County Property Tax Rates: Levy Rates, Taxing Districts and Why Bills Change
King County property tax is based on assessed value and the combined levy rates of the taxing districts that apply to your parcel. Your property may be affected by county, city, school, fire, library, hospital, port, state school and other district levies.
Assessed value
The Assessor determines the value used in the property tax system.
Levy rate
District rates are combined based on where the property is located.
Tax amount
Assessed value multiplied by the combined levy rate produces the base tax amount.
| Rate Factor | What It Means | Where to Check |
|---|---|---|
| Assessed value | The value assigned by the Assessor for tax purposes. | Assessor eReal Property Search. |
| Levy code area | The group of taxing districts that applies to your parcel. | eReal Property and levy rate reports. |
| School and city levies | Often major parts of the total bill depending on location. | Property tax statement and levy reports. |
| Voter-approved measures | Levies approved by voters can change the tax amount. | Tax statement, local district information and reports. |
Real King County Property Tax Tips That Save Time and Prevent Costly Mistakes
These practical checks help King County property owners avoid wrong-parcel payments, missed exemptions, escrow confusion, deadline penalties and bad rate estimates.
Remove dashes before search
The payment portal asks for account or parcel number without dashes. If search fails, try the number in clean numeric format.
Use Parcel Viewer when address search fails
Parcel Viewer lets you search by map and open direct parcel links. This is useful for condos, vacant land and odd addresses.
Do not confuse value with tax
Assessed value is only one part. Levy rates and districts decide how that value turns into tax.
Check escrow before each half
First-half paid does not guarantee second-half paid. Confirm both April and October payment status.
Apply early for relief
Senior, disabled and deferral programs require official review. Do not wait until the last payment week.
Use Recorder for deeds
A tax statement is not a deed or title report. Use King County Recorder for official recorded documents.
King County Senior, Disabled and Veteran Property Tax Relief
King County Assessor administers property tax relief programs for qualifying senior citizens and people with disabilities. State law includes exemption and deferral programs that may reduce taxes or allow payment later.
Senior exemption
For qualifying senior homeowners who meet age, residence and income rules.
Disability exemption
For qualifying people with disabilities under state and county-administered rules.
Deferral program
Allows some qualifying owners to delay property tax payment rather than reduce it immediately.
1
Open King County senior or disabled tax relief page
Best starting point for exemption and deferral rules
Use the King County Assessor tax relief page to review senior and disabled exemption and deferral programs. The page explains that exemptions reduce tax and deferrals allow payment later.
2
Apply online when possible
King County recommends online filing for faster service
King County forms resources include online and paper options for senior citizen and disabled exemption applications. Online filing is often recommended for faster service.
3
Track approval before assuming your bill changed
Do not pay the wrong amount based on expectation
Do not assume a tax relief application is approved until the official account or written notice reflects it. If the deadline is near, contact the Assessor or Treasury for guidance.
How to Review or Appeal a King County Property Assessment
If your assessed value, property characteristics or tax classification seems wrong, start with the King County Assessor record. Payment questions go to Treasury, but value questions start with Assessor data and appeal channels.
Value disagreement
Review comparable sales, market changes, condition problems and Assessor valuation evidence.
Property detail error
Check building size, year built, land area, property use, remodel status and neighborhood data.
Tax relief issue
Check senior, disabled, deferral or other relief status before assuming the bill is final.
King County Recorded Documents, Deeds and Official Records Search
Tax records, Assessor records and recorded property documents are different. Tax records show billing and payment. Assessor records show value and parcel data. Recorder records show official recorded documents such as deeds and other instruments.
Tax statement
Useful for payment amount, account number, parcel number, tax year, installments and receipt proof.
Recorded document
Useful for deed, easement, lien, release, recorded instrument, copy request and ownership-chain research.
1
Open King County Recorder online records search
Best place for recorded document research
Use King County Recorder’s online records search to search the free database of official records. King County says most documents recorded on or after August 1, 1991 are available online.
2
Use tax and Assessor records as clues
They help but do not replace recorded documents
Use parcel number, legal description, owner names, sale history and property address from Assessor records as search clues. Then confirm actual title or deed information through recorded documents and professionals.
King County Property Tax Office Address, Phone Numbers and Map
Use the right office for the right job. Treasury for tax payments and statements. Assessor for values, eReal Property, levy rates, exemptions and deferrals. Recorder for official recorded documents.
King County Treasury Operations
201 S. Jackson St., Seattle, WA 98104
Property tax information: 206-263-2890
Use for tax statements, payment questions and property tax collection.
King County Assessor
Use for property value, eReal Property, levy rate reports, sale history, tax relief, exemptions, deferrals and assessment-related questions.
King County Recorder
Use for official recorded documents, online records search, copies and property-document research.
King County Homeowner and Buyer Property Tax Checklist
Use this checklist before paying, buying, refinancing, appealing, applying for tax relief or checking mortgage escrow payment status.
| Check | Why It Matters | Official Place |
|---|---|---|
| Parcel number | Needed for clean lookup and payment search. | Parcel Viewer / eReal Property |
| Tax account statement | Shows amount due, installment status and tax year. | King County Treasury portal |
| Assessed value | Explains one major part of the tax calculation. | King County Assessor eReal Property |
| Levy rates | District rates explain why bills vary by location. | Levy rate reports / eReal Property |
| Exemption or deferral eligibility | Senior and disabled homeowners may qualify for relief. | King County Assessor tax relief |
| Recorded documents | Needed for deeds, liens and title-related records. | King County Recorder |
Official King County Property Tax Links to Save
Use these official resources for property tax lookup, payment, parcel search, valuation, levy rates, exemptions, deferrals and recorded property documents.
Assessor and parcel search
Rates and tax relief
King County Property Tax Lookup, Pay and Rates FAQ
Quick answers for the most common King County property tax searches.
Where do I pay King County property taxes online?▾
Use the official King County payment site and choose Property Taxes. Search by tax account or parcel number, confirm the property and pay through the official portal.
How do I look up King County property tax by address?▾
Use King County Parcel Viewer or Assessor eReal Property Search to find the parcel number from an address. Then use the property tax payment portal to view payment details.
When are King County property taxes due?▾
King County property taxes are generally paid in two installments. The first half is due April 30 and the second half is due October 31. If the date falls on a weekend or King County holiday, taxes are due the next business day.
What number do I need for King County property tax lookup?▾
You generally need the property tax account number or parcel number. King County’s payment portal asks users not to include dashes when entering the number.
Where can I see King County property value and sale history?▾
Use King County Assessor eReal Property Search. It shows valuations, property characteristics, levy rates and sale history.
How are King County property tax rates calculated?▾
Tax rates are based on the combined levy rates of the taxing districts where the property is located. The assessed value multiplied by the combined levy rate produces the tax amount.
Where do seniors or disabled homeowners apply for tax relief?▾
Use King County Assessor’s senior or disabled exemptions and deferrals page. These programs are different from simply paying the bill and must be applied for through official channels.
Where do I search King County deeds and recorded documents?▾
Use King County Recorder’s online records search. Tax statements and Assessor records are not the same as recorded deeds or title documents.
Is PropertyTaxUSA.org an official King County website?▾
No. PropertyTaxUSA.org is an independent informational guide. Always use official King County Treasury, Assessor, Recorder and Washington Department of Revenue resources for payments, exemptions, appeals and property-specific decisions.