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King County Department of Assessments

Fair, equitable, and understandable property valuations
500 Fourth Ave.,
Seattle, WA 98104


Mon – Fri: 
8:30 a.m. to 4:30 p.m.

Tel: 206-296-7300
Fax: 206-296-5107
TTY: 206-296-7888


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Message to Taxpayers:

King County Assessor Lloyd Hara talks about his dedication to customer service and the drive to make the King County Department of Assessments a leader in innovation and transparency.

Learn more

Lloyd Hara, King County Assessor.

Lloyd Hara,

King County Assessor

  • Seattle skyline, aerial view.
  • A King County Metro bus.
  • A boy at Madison Park beach
  • Cargo and Cruise ships docked at Harbor Island
  • King County Housing
  • A King County worker on a forklift
  • DOT road construction
  • Sammamish bike trail
  • Sheriff's Department aerial support
  • A school bus picking up King County children
  • A rural King County road.
  • Snowplows clearing a King County Road
  • Seattle Fire Department
  • Students studying at the Seattle Public Library
  • An ambulance arriving at Harborview Medical Center
  • A Seattle neighborhood
  • A King County ambulance
Property taxes fund state and county services, including roads, transit, schools, libraries, and hospitals.


Several types of tax exemptions and deferrals are available for homeowners, farmers and business owners in King County. In addition, you can get help if you have a question about your assessment or would like to file an appeal.


The Department of Assessments and the independent Board of Equalization are bringing online a new set of tools that will make it dramatically easier for taxpayers to see how their property compares to others we've used to set assessed values.

King County eAppeals (


Each year, our staff of accredited real estate appraisers value more than 660,000 residential and commercial properties throughout King County, as well as personal property used in business. Those valuations are then used to calculate the owner's property taxes for the following year.


Just looking for a quick answer? Click on the tab above for your area of interest.

A day in the life of a King County Appraiser

How is your property assessed?

2013 Property Tax


  • April 30th First half of property taxes due
    (Total due if less than $50)
  • April 30th Personal property listing forms due
  • June 1 Three percent penalty assessed on delinquent taxes
  • July 1 Appeals to the County Board of Equalization must be filed by July 1 or within
    60 days of notification.
  • Sept. 1 Applications for limited income
    deferrals due
  • Oct. 31 Second half of property taxes due
  • Dec. 1 Eight percent penalty assessed on delinquent taxes
  • Full 2014 Property Tax Calendar (.PDF, External link)


eReal Property icon eReal Property
View parcel characteristics, values and sale history
eSales icon eSales
Search sales for comparison
eListing icon eListing
File Personal Property Listing Online
Flood icon Recent flood and storm destroyed property