Assessor
Washington County Assessment & Taxation
Appeal Deadline
December 31
Required Form
Board of Property Tax Appeals form
Risk of Increase
No
Median Home Value
$480,000
Effective Tax Rate
1.08%
Estimated Annual Savings
$778
Based on 15% reduction
Washington County Assessment & Taxation Portal
Access your property records, assessment details, and file appeals directly through the official Washington County website.
Visit https://www.washingtoncountyor.gov/atTips for Washington County Appeals
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Beaverton/Hillsboro area west of Portland
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File appeal with the Board of Property Tax Appeals
Step-by-Step
How to Appeal in Washington County
Review your property assessment notice from Washington County Assessment & Taxation. Verify the property details — square footage, bedroom count, lot size, and condition.
Research comparable sales in your area. Look for recent sales of similar properties that sold for less than your assessed value.
File your appeal by the December 31 deadline. You can file online at https://www.washingtoncountyor.gov/at, by mail, or in person.
Prepare your evidence packet. Include comparable sales data, property condition photos, and any repair estimates that affect value.
Attend your appeal hearing. Present your evidence clearly and focus on comparable sales that support a lower value.
Receive your decision. If the appeal is unsuccessful, check your options for further appeal.
No Risk of Increase
In Oregon, your assessed value cannot increase as a result of filing a appeal. Your value can only stay the same or go down. There is no risk to filing.
FAQ
Washington County Property Tax Questions
How do I appeal my property tax in Washington County, Oregon?
File a appeal with Washington County Assessment & Taxation by the December 31 deadline. You can file online at https://www.washingtoncountyor.gov/at, by mail, or in person. ProtestMax generates your complete appeal packet for $45 flat.
What is the property tax rate in Washington County?
The average effective property tax rate in Washington County is approximately 1.08%. The median home value is $480,000, resulting in an average annual tax bill of approximately $5,184.
What is the appeal deadline for Washington County?
The appeal deadline for Washington County is December 31. Make sure to file before this deadline to preserve your right to appeal.
How much can I save by appealing my Washington County property tax?
A successful appeal in Washington County typically reduces the assessed value by 10-20%. On the median home value of $480,000, a 15% reduction saves approximately $778 per year.
Can my property tax increase if I appeal?
No. In Oregon, your assessed value cannot increase as a result of filing a appeal. Your value can only stay the same or go down.