$8.4B
2026 property taxes
Approximately 10% above the prior year, according to King County.
Homespring local research
King County Assessment Watch: 2026 notices and appeal timing
King County sends residential value notices in waves rather than on one countywide date. This page turns the official mailing schedule, appeal rules, and 2026 tax-roll totals into one homeowner checklist.
Last verified August 15, 2026Official notice schedule
$920B
total county property value
Approximately 5.4% above the 2025 county total.
About 25%
appeals with a reduced assessment
King County's published overview stresses that proper evidence is essential.
40 minutes
allowed for each appeal hearing
Both sides may present testimony, questions, and rebuttal.
Countywide totals describe the tax roll, not whether any individual home is over-assessed. A property appeal still requires evidence tied to that home and the applicable valuation date.
Latest Seattle-area batches
Find when your assessment area mailed
These are the most recent Seattle-heavy batches on the county's 2026 schedule. Use the mailing information as an alert, then confirm the date and filing deadline for your own parcel in the official county record.
The filing rule is July 1 or within 60 days from the mailing date printed on your value notice, whichever is later. Do not substitute a neighborhood batch date for the deadline shown for your property.
Mailed August 13, 2026
Appeal deadline: October 13, 2026
- Haller Lake, North Greenwood, and Crown Hill
- Northgate and Maple Leaf
- Lake City and Matthews Beach
- West Ballard
- Columbia City and Rainier Valley
- Phinney Ridge and Fremont
- Green Lake and Wallingford
- Ravenna and University District
- Laurelhurst, Windermere, and View Ridge
- East Ballard
Mailed August 6, 2026
Appeal deadline: October 5, 2026
- Central District
- North Sammamish Plateau
- Woodinville, Cottage Lake, and Hollywood Hill
- Inglewood, Finn Hill, and Juanita
- Broadview, Blue Ridge, and Shilshole
- South Sammamish Plateau
- Redmond Ridge and surrounding areas
- Kingsgate and Queensgate
Mailed July 30, 2026
Appeal deadline: September 28, 2026
- Magnolia
- Queen Anne
- Capitol Hill
- Madison Park, Leschi, and Mount Baker
- Alki
- Fauntleroy
- Delridge, Georgetown, and South Park
- Rainier Beach
- West Seattle
- Beacon Hill
- Seward Park
Property-level check
Countywide change is not the appeal test
A rising bill can reflect levies, while an appeal asks whether the assessed value exceeds true and fair market value. Start with the address to review the individual record and available evidence.
Check a King County property
No signup or credit card is required to start the address review.
Primary sources and methodology
Homespring manually checked the public county pages below on August 15, 2026. Notice batches are transcribed from the official schedule. Countywide totals and process statistics are kept separate from any individual savings estimate.