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Thurston County, Washington

Board of Equalization

2023 Assessment Year

The Assessor mailed 2023 assessment notices for real property on June 1, 2023. To appeal your assessment, you must have submitted your completed Petition to the Board of Equalization by 5 pm on the deadline:  Tuesday, August 1, 2023. If the Assessor's Office issued you a new Official Property Value Change Notice that has a subsequent date, your deadline will be 5 pm on the date listed on the new notice.

For the 2023 filing period, the Board of Equalization continues to accept online submissions of completed Petition forms through the "NEW Petition Submission" link under Filing Electronic Submissions on our home page. 

Taxpayers may also send submissions to the Board of Equalization at 3000 Pacific Avenue SE, Olympia, WA 98501 by mail through the US Postal Service, delivering in person, or using a service such as UPS or Fed Ex. If mailing your submission through the US Postal Service, it must be postmarked on or before 5 pm on the deadline date. BOE customer service hours are by appointment only, so if our office is closed, you may deposit your submission in the drop box located in the parking lot of 3000 Pacific Avenue SE, or in the drop box across the hall from the BOE office. 

A separate Petition form must be completed 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.

For 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, Clerk of the Board.