King County Assessor

Learn more about the Assessor. Learn more about how property assessments work and how to file an appeal.

John Wilson is the current King County Assessor. The Assessor's office provides valuations for every property in the county.

How we do it:

Locate every taxable property in the county
Identify property ownership
Establish a taxable value
Apply legal exemptions to property taxes

The Assessor's office doesn't manage your property tax payments. The county's Treasury Department handles that.

Top topics

eReal Property

Search for property information using a parcel number or address.

Localscape

Learn more about property in your community.

Property tax relief

Learn more about property tax deferral programs and how to apply.

Senior exemptions

Find out how to qualify and apply for senior property tax exemptions.

About property taxes

Find links to current and past-year's tax information.

Appeals

File your petition online or by mail.

News

Get the latest news from the Assessor’s office.

Leadership

Meet Assessor John Wilson and his leadership team.

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