skip to main content

Department of Assessments
500 Fourth Avenue,
Suite ADM-AS-0708,
Seattle, WA 98104

Office Hours:
Mon., Tue., Wed., Fri.
8:30 AM to 4:30 PM

Thu. 9:30 AM to 4:30 PM

TEL: 206-296-7300
FAX: 206-296-5107
TTY: 206-296-7888

Send us mail

Contact for information about assessed values or the assessment process.

If you have questions about your property, you can reach offices in the King County Courthouse and Administration Building by dialing this toll free number: 1-800-325-6165-Ext 67300

Public Information

E-MAIL ADDRESS: Assessor.Info@KingCounty.Gov		 206-296-7300
TDD 206-296-7888
FAX 206-296-5107
Property Values, Appraisal Help, Comparable Sales, Legal Descriptions 206-296-7300
TDD 206-296-7888
Personal Property (business equipment and furniture affidavits)

E-MAIL ADDRESS: Personal.Property@KingCounty.Gov		 206-296-5126
Personal Property (mobile homes)

206-296-5126

Personal Property (floating homes) 206-296-5126
Senior Citizen and Disability Exemptions 206-296-3920
TDD 206-296-7889
Senior Citizen and Disability Deferrals 206-296-5151
TDD 206-296-7889
Destroyed Property Exemptions 206-296-5151
TDD 206-296-7889
Home Improvement Exemptions 206-205-0656
Nonprofit Organizations 206-296-5151
Open Space Agriculture & Forest Land 206-296-3969
Public Benefit Rating System &Timber Land 206-205-5170
Historic Property Exemptions 206-296-5145


King County Treasury Operations (Taxes)

Contact for information about taxes and the tax collection process.

Real Property Tax Information 206-296-0923
Customer Service 206-296-3850
Personal Property Tax Information 206-296-4290
Local Improvement District Records 206-296-3913
Property Tax Refunds 206-296-3413
Property Tax Foreclosures 206-296-4184
Real Estate Excise Tax 206-296-1570
Manager's Office 206-296-7326


King County Property Tax Advisor

Contact for advice and assistance regarding property taxes.

Property Valuation Questions and Appeals Counseling 206-296-5202


King County Board of Equalization/appeals

Contact for information regarding appealing an assessment.

Property Valuation Appeals 206-296-3496


King County Records & Elections Division

Contact for information about recorded property documents.

General Information 206-296-1565
Real Estate Excise Tax 206-296-1570
Plats, Condominiums, and Surveys 206-296-1570


Community Service Centers

Contact for information and services these centers provide.

BlackRiver 206-296-7810
Cottage Lake 206-296-2733
Northshore 206-296-9840
Regional Justice Center in Kent 206-205-7330
Sammamish 425-296-0750
Vashon-Maury Island 206-296-4510


Washington State Board of Tax Appeals (external link)

Contact for information about filing an appeal with the State Board.

Property Valuation Appeals (Olympia) 360-753-5449


Washington State Department of Revenue (external)

Contact for information about state guidelines for tax administration.

Tax Information, Toll Free Dialing 1-800-647-7706
Property Tax (Olympia) 360-570-5900


International Association of Assessing Officers (IAAO) (external)

Contact for information about organization's activities and training offerings.

Chicago Office 1-800-616-4226


Appraisal Foundation (external)

Contact for information about organization's activities and training offerings.

Washington D.C. Office 1-202-347-7722

Reference Link:

Community Service Centers

Weather Update (external link)