Assessment Ratio
100%
Appeal Deadline
July 1, 2026
Official Form
Real Property Petition
Risk of Increase
Yes
How Assessment Works in Washington
Washington assesses property at 100% of true and fair value (market value). Your assessed value should reflect what your home would sell for. If comparable sales show your assessment is too high, you have grounds to appeal.
Risk of Increase
In Washington, filing a appeal can result in your assessed value being increased. This is uncommon when you have strong evidence of over-assessment, but you should be aware of this possibility. ProtestMax only recommends filing when our analysis shows a clear case for reduction.
How to File in Washington
File a petition with your county Board of Equalization. Some counties accept online filings. The deadline is typically July 1 or 60 days after the change of value notice.
Step-by-Step
Washington Appeal Process
Receive your change of value notice from the county assessor (typically mailed in spring).
File a petition with your county Board of Equalization by July 1 or 60 days from the notice, whichever is later.
Gather comparable sales evidence, professional appraisals, and photos of property condition.
Attend the Board of Equalization hearing and present your evidence.
If you disagree with the decision, you can appeal to the State Board of Tax Appeals within 30 days.
FAQ
Washington Property Tax Appeal Questions
Can my Washington assessment increase on appeal?
Yes. The Board of Equalization can increase your assessment if they find it is below market value. However, this is uncommon when your evidence clearly shows over-assessment.
What evidence is most effective in Washington?
Recent comparable sales (within the last 6-12 months) within your neighborhood are the strongest evidence. Professional appraisals, photos of property defects, and market trend data also support your case.
How often are Washington properties reassessed?
Washington properties are revalued annually by the county assessor, though physical inspections typically occur on a 4-6 year cycle. You can appeal every year if you believe the value is incorrect.