America's Property Tax Advisor

King County, WA Requires Additional Documentation


Appeals filed with the assessor’s office in King County, Washington are now required to include a copy of the original value change notice.


The Department of Revenue (DOR) has provided that an appeal, including eAppeals, can only be deemed complete by the Board of Equalization (BOE) if a copy of the assessor’s original valuation notice or a determination is provided with an appeal filing. The Board will not accept a website printout as an original valuation notice.


In addition to this new requirement, taxpayers also need to consider the following changes to appeal procedures received from the DOR:


  • Appeal withdrawals must be made no later than two days prior to a scheduled hearing.

  • Additional evidence submitted in hard copy, after the initial appeal form filing, must be mailed separately to both the Assessor and the Board.

  • Technical issues with the online appeal filing system are not permissible reasons for the Board to grant a waiver of the filing deadline.

Lastly, due to the current state of the COVID-19 pandemic, the Assessor’s office will remain closed for in‐person services until at least mid‐January 2022 after which the default hearing format will remain by phone.