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Property Tax

NOTE Due to an infrastructure upgrade, the online payment option will not be available for use commencing Saturday, September 21st between the hours of 12:00pm PST and 3:00am PST on September 22nd. The length of the outage is approximate and subject to change. Thank you for your patience.

King County Treasury Operations

King County Administration Building
500 Fourth Ave., Suite 600
Seattle, WA 98104

Hours: Monday-Friday, 8:30 am-4:30 pm PST

Property Tax Information and Customer Service
206-263-2890 PropertyTax.CustomerService@kingcounty.gov 

Mobile Homes/Commercial Personal Property
206-263-2844 Treasury.PersonalProperty@kingcounty.gov

Tax Foreclosures
206-263-2649 TaxForeclosures@kingcounty.gov

Maintenance Assessment Management Systems
Local Improvement Districts
206-263-1893 mams.lid@kingcounty.gov

TTY Relay 711