King County · Washington (WA)
How to Appeal Your Property Tax Assessment in King County
File a petition with the County Board of Equalization by July 1 or within 60 days of the assessment notice.
Includes Seattle.
Filing Deadline
July 1
Appeals Body
King County Board of Equalization
Assessor Website
kingcounty.gov/assessorGenerate Your King County Appeal Letter
Answer 3 questions, pick comparable properties, download your King County Board of Equalization-ready letter. Only pay when you are happy with the result.
Start Your AppealInstant download
Filing Steps for King County
1. Gather comps
Find 3-5 comparable properties in King County assessed lower per square foot than yours. Use the county assessor's public records or property sites.
2. File your protest
Submit your protest to the King County Board of Equalization by July 1. Include your evidence and this letter.
3. Attend your hearing
Present your case. Most hearings take 10-15 minutes. Many are resolved informally before the formal hearing date.
Other Counties in Washington
Deadlines and procedures change. Always verify with the King County Board of Equalization before filing. This is not legal advice.