When is the Sammamish property tax appeal deadline?

The 2026 Sammamish property tax appeal deadline follows King County's rule: July 1, 2026, or 60 days from the Official Property Value Notice mail date, whichever is later. The notice mail date controls for most homeowners.

How long does a Sammamish property tax appeal take?

A Sammamish property tax appeal can run several months from filing to written decision because the King County Board of Equalization controls the hearing calendar. Any reduction applies to the assessment year under appeal.

Do I need to attend a Sammamish property tax hearing?

Some King County appeals are resolved before a homeowner appearance, and others receive a Board of Equalization hearing date. When a hearing is part of the case, the homeowner is working inside the county's appeal calendar.

What does a Sammamish property tax appeal cost?

The review is free, and the appeal fee is contingency based. That means the fee applies only when the appeal reduces the tax, and it is calculated as a percentage of first-year tax savings.

Did the Issaquah School District boundary push Sammamish assessments higher in 2026?

Strong Issaquah School District demand has historically pulled some Sammamish pockets harder than others, and a citywide model can carry that pressure unevenly. A review checks whether your home's 2026 value reflects its actual school and location pocket.

Sammamish Property Taxes Went Up a Lot in King County | FairAppeal

A large Sammamish property tax increase can come from King County's annual reassessment and Eastside value pressure, but the notice still matters.

Sammamish residential street with trees and an organized tax notice

Sammamish property taxes went up because King County reassesses every year and Eastside assessed values, newer homes, and view premiums can dominate the bill even when a specific street did not move that fast. The 2026 notice is that increase in one number.

Why did Sammamish property taxes go up?

The tax bill follows the assessed value, the local rate stack, and voter-approved levies. In Sammamish, the assessed-value piece can be large enough to dominate the conversation, especially where newer homes and view premiums pull the city narrative upward.

What does the 2026 increase change?

For a personalized Fair Appeal review of your Sammamish home, enter your address on the homepage; the review is free, and FairAppeal only collects a percentage of first-year tax savings when the appeal actually wins. The official property tax appeal deadline rule is published by the King County Board of Equalization.

Related King County guides: 2026 King County appeal deadline, Sammamish property tax bill too high, Auburn property taxes went up a lot. For broader context, see the King County area guide, or browse all FairAppeal articles.

Sammamish Property Taxes Went Up a Lot in King County

Why did Sammamish property taxes go up?

What does the 2026 increase change?

See if your home is overassessed