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Our services are available online, by phone, by email, or by mail:

See below links: pay or view your account online, do a property search, or sign up for e-Reminder Notices via text or email.

  • Phone: Real Property Tax (Real Estate) 206-263-2890
  • Phone: Mobile Homes and Personal Property Commercial Property Tax 206-263-2844
  • Email:
  • Mail: King County Treasury Operations, 500 Fourth Ave., Ste. 600, Seattle, WA 98104
  • Secure drop box at our address: drop box is on the 5th Avenue side of our building

COVID-19 Update: The health and safety of our community and employees is our top priority. To help slow the spread of coronavirus (COVID-19), King County Treasury customer service operations are being provided remotely until further notice.

Real & Personal Property tax statements will be mailed on February 14 2021.

Payment deadline for first half is April 30 and second half October 31.

To review current amounts due please use the safe and secure online eCommerce System 

What is Real Property and Personal Property Taxes?                                     

  • Real Property is Residential or Commercial land and structure
  • Personal Property are Assets used in conducting a business 
  • Mobile Homes and Floating Homes are taxed as Personal Property if not associated with a Real Property account


I know my parcel/account number

I do NOT know my parcel/account number

Need help? Check our Frequently Asked Questions (FAQ), call 206-263-2890, or email


Many changes have been made to the property tax exemption and deferral programs for seniors, people with disabilities, and military veterans with a service-connected disability. Instead of a fixed amount, the annual income limit is now indexed at 65% of the median household income in King County, which for 2019 was $58,423. These changes take effect for property taxes collected in 2020. Please visit the Assessor's Office website for detailed eligibility information and how to apply.

Be aware that the accuracy of the information you are accessing may be affected by pending payments or other changes. Therefore, King County Treasury Operations cannot warrant the accuracy, reliability, or timeliness of this information, and shall not be held liable for losses caused by using this information. Any person or entity that relies on any information obtained from this system does so at their own risk.

Sign up for a property tax reminder

Get an email or text message reminder roughly 30 days before the property tax payment deadlines of April 30 and October 31.

Manage your account, or unsubscribe from text or email alerts.

This service is only a reminder of King County property tax payment deadlines. If the message doesn't reach you for any reason, you are still required to pay your property taxes on time. Fees will be added to late property tax payments. King County is not at fault for late payments, even if this notice fails to send, or is never received.

King County Treasury Operations will only use the email address or cell phone number you provide to send you property tax deadline reminders. The King County Privacy Policy explains how we handle the information you give us.

King County Treasury Operations, 500 Fourth Ave., Suite 600 Seattle, WA 98104

Property Tax Information and Customer Service-------------------- 206-263-2890 ----
Mobile Homes/Commercial Personal Property---------------------- 206-263-2844 ----
Tax Foreclosures --------------------------------------------------------------- 206-263-2649 ----
Maintenance Assessment Mgmt Systems/Local Improvement Districts  206-263-1893