Property Tax Appeal — Seatac, King County

Seatac has 5,300 residential properties in the King County assessment roll. Recent comparable sales average $641,348. If your assessed value is higher than what similar homes are selling for, you may be overpaying property taxes.

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Seatac Property Stats

Total Properties
5,300
Average Home Size
1,742 sq ft
Average Year Built
1962
Average Bedrooms
3.4
Average Bathrooms
1.7
Year Built Range
1900 — 2026

Recent Sales in Seatac

Comparable Sales on File
413
Average Sale Price
$641,348
Average Price per Sq Ft
$402

These numbers are based on arm's-length residential sales in King County records. Your specific property may differ — run a free check above for personalized comps.

ZIP Codes in Seatac

98188 (3,192) 98168 (990) 98198 (810) 98148 (42)

How to Appeal Property Taxes in Seatac

Property tax appeals in Seatac follow the same King County process. You have until July 1 each year to file with the Board of Equalization. The key to a successful appeal is strong comparable sales evidence — homes similar to yours that sold for less than your assessed value. Our tool finds those comps automatically and generates professional appeal documents you can file in about 10 minutes.