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Our website is changing! Starting March 31, 2023 our website will look different, but we're working hard to make sure you can still find what you need.  
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CLICK HERE to watch a VIDEO about how to pay property taxes ONLINE

In-person Customer Service Center Coming In Early 2023 to King Street Center

Treasury services are currently available online, by phone, email, or US 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
  • Real Property Email:
  • Phone: Mobile Homes and Personal Property Commercial Property Tax 206-263-2844
  • Personal Property Email:
  • Mail: King County Treasury Operations, 201 S. Jackson Street, Suite 710, Seattle, WA 98104 NOTE NEW MAILING ADDRESS
  • Secure drop box: Corner of Second Avenue nearer to S. Jackson St., inside the security gates. Open 8:30 a.m. - 4:30 p.m. weekdays.

I know my parcel/account number

I do NOT know my parcel/account number

Need additional information? Check our Frequently Asked Questions (FAQ).

2023 Property Tax

  • May 1st  is payment deadline for the first half 2023 property taxes
  • To review current amounts or pay your property tax bill
  • Please use our safe and secure online eCommerce System

    What are Real Property and Personal Property Taxes?

    • Real Property is residential or commercial land and structures.
    • Personal property is assets used in conducting a business.
    • Mobile homes and floating homes are taxed as personal property if not associated with a real property account.
    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.

    Contact Information

    King County Treasury Operations, King Street Center, 201 S. Jackson St, Suite 710, Seattle, WA 98104

    Property Tax Information and Customer Service
    206-263-2890 or

    Mobile Homes/Commercial Personal Property
    206-263-2844 or

    Tax Foreclosures
    206-263-2649 or

    Maintenance Assessment Management Systems/Local Improvement Districts
    206-263-1893 or