A 2-minute self-check for Seattle homeowners weighing a 2026 property tax appeal, with six signals that come up most often on overassessed Seattle homes.
The 2026 King County filing window runs through July 1, or 60 days from your Official Property Value Notice mail date, whichever is later. Seattle appeals are block-level work: arterial exposure on Aurora or Rainier, light rail premiums, condo view loss, and West Seattle commute sensitivity all point to different evidence.
What to do next
If the self-check raised a question, you can look it over yourself, or use FairAppeal to see if you are overpaying. In Seattle, the question is whether the assessed value still fits the specific home, block, and condition a buyer would actually see. Fair Appeal handles the full Seattle appeal from review through hearing and only charges a percentage of first-year tax savings when the appeal wins.
For the broader context, see the Seattle property taxes guide or the 2026 King County property tax appeal guide.
Look up if you are overpaying on your Seattle home.
King County reassesses every home every year and leans on neighborhood comps without seeing condition.