Dates and other Miscellaneous

If you wish to appeal the new appraised value of your property, your appeal must be filed no later than July 1 of the assessment year or within 60 days from the mailing date on the front of the Official Property Value Notice, whichever is later.

A separate appeal must be filed each year to protect your appeal rights, as past or pending appeals should not be assumed to affect the value on your most recent notice.

Is property assessed at its full value?
Yes. The state constitution requires King County to assess property at 100% of its true and fair value, which is defined as the amount a buyer, willing but not obligated to buy, would pay to a seller willing but not obligated to sell.