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. The self-check below takes about two minutes and flags the signals that come up most often on overassessed Seattle homes.
What to do next
Whichever boxes you checked — even one — the next step is the same: take two minutes for a free review. A single signal usually grows into a real case once the full property record is pulled, and FairAppeal regularly finds angles a self-check does not surface (property-record errors, equity comps, condition issues a homeowner has stopped noticing). Enter your address on the homepage. FairAppeal 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.