Property Tax Appeal — King County, King County

King County has 76,311 residential properties in the King County assessment roll. Recent comparable sales average $1,137,998. If your assessed value is higher than what similar homes are selling for, you may be overpaying property taxes.

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King County Property Stats

Total Properties

76,311

Average Home Size

2,291 sq ft

Average Year Built

1979

Average Bedrooms

3.4

Average Bathrooms

2.1

Year Built Range

1900 — 2026

Recent Sales in King County

Comparable Sales on File

7,876

Average Sale Price

$1,137,998

Average Price per Sq Ft

$482

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 King County

98058 (7,487) 98053 (5,826) 98001 (5,539) 98070 (4,467) 98178 (4,161) 98077 (4,149) 98059 (3,986) 98042 (3,786) 98022 (3,022) 98045 (2,846)

How to Appeal Property Taxes in King County

Property tax appeals in King County 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.

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