King County Online Filing Portal
The King County Assessor online portal allows homeowners to file their appeal and view settlement offers.
How to Access the Portal
- Find your account number and PIN on your assessment notice
- Visit the King County Assessor portal at https://blue.kingcounty.gov/assessor/eappeals/Index.aspx
- Create an account or log in using your account number
- File your appeal and upload evidence
- Monitor for informal settlement offers