Assessment Appeals


The Assessor mailed 2021 assessment notices for real property, personal property and new construction valuations on August 23, 2021. To appeal your assessment, you must submit your completed Petition to the Board of Equalization by 5 pm on the deadline:  Friday, October 22, 2021

For the 2021 filing period, the Board of Equalization will continue to accept online submissions of completed Petition forms through the Submit NEW Petition link on our website. If you choose to mail your Petition through the US Postal Service, send it to Thurston County Board of Equalization, 2000 Lakeridge Drive SW, Olympia, WA  98502. Your submission must be postmarked by the U.S. Postal Service on or before 5 pm on the deadline date of October 22, 2021. 

If you wish to deliver your completed Petition forms in person or send them via UPS or Fed Ex, our office location is 929 Lakeridge Drive SW, Room 117, Olympia, WA 98502. There are drop boxes to deposit your submission outside the BOE office (Building 4, Room 117), by the back entrance outside of Building 4 (929 Lakeridge Drive SW), or at the main courthouse complex (2000 Lakeridge Dr. SW). Taxpayers must submit a separate Petition form for each tax parcel. Please refer to the Appeal Preparation Guide for Residential Appeals to obtain helpful information on preparing your residential real property Petition.

Customer service is currently by appointment only. Regular customer service hours are available only during the appeal periodFor more information, or if you have any questions, please contact our office at (360) 786-5135, TDD call 711 or 1-800-833-6388, or email Ruth Elder.