Washington assesses at 100% of market value — RCW 84.40.030
Type your address.
See what your property is worth under every method state law allows.
Washington gives assessors three approaches to value and several alternative bases entirely. Your county picked one. Enter an address and this pulls your actual assessment and building record straight from Yakima County, runs the other methods, and shows the arithmetic with the statute behind each step.
Covers Yakima County, reading the county assessor's own published records. Nothing you look up is stored or sent anywhere.
Property
What the county says your property is worth
What each lawful method indicates
Same property, same date, different method. All of it computed from the county's own record of your building and the sales in your assessment neighborhood.
Adjust the assumptions Everything above is already filled in from county records. Open this only to correct something or test a scenario.
What it would mean in dollars
Why your bill will outrun the 1% limit
The 1% cap is real, but it only governs part of your bill — and the 2025 Legislature raised the ceiling on the part it does not govern.
The three approaches Washington allows
WAC 458-07-030(3) — an assessor "may use the sales (market data) approach, the cost approach, or the income approach, or a combination of the three."
The 1% limit, and what it does not cover
Most people believe property taxes cannot rise more than 1% a year. That is true of one category of levy and false of the rest.
How the state grades your assessor
Every year the Department of Revenue compares assessments against actual sale prices and publishes the result. These are the state's own numbers, not ours.
Alternative bases of value
These are not appeals. They are separate statutory programs where the legislature decided market value is the wrong measure — and several of them dwarf anything an appeal can win.
If you decide to appeal
Take this with you
A summary with your figures, the method behind each one, and the statute cited — formatted to attach to a petition.