Oregon Property Tax Assessors

Washington County, Oregon Tax Assessors' Office

Washington County Assessors Phone Number
Washington County Assessment and Taxation Department
155 North First Avenue, Suite 130
Hillsboro, Oregon 97124
Washington County Assessors Fax Number 503-846-3909 (Fax)

Where is the Washington County Tax Assessor's Office?

The Washington County Tax Assessor, Delinquent Property Taxes & Tax Foreclosures Office is located at 155 North First Avenue, Suite 130, at the building in Hillsboro, Oregon.

What can the Washington County Assessor's Office do for me?

The Washington County Tax Assessor's Office oversees the appraisal and assessment of properties as well as the billing and collection of property taxes for all taxable real estate located in Washington County.

Contact the assessor's office if you need help with paying your property taxes, applying for a homestead exemption or other tax exemption, reporting upgrades to your home, appealing your property tax assessment, or verifying your property records.

Submitting a Washington County property tax appeal

If you believe that your house has been unfairly overappraised (i.e. appraised at a value higher than the true market value of the property), you can attempt to get your home re-appraised at a lower value by contacting the Assessor's Office to submit a property tax appeal.

You will have to submit a form describing your property and sufficient proof that it is overassessed, including valuations of similar homes nearby as evidence. If your appeal is accepted, your home assessment (and property taxes) will be lowered as a result.

If you would like to appeal your property, call the Washington County Assessor's Office at (503) 846 8741 and ask for a property tax appeal form. Keep in mind that property tax appeals are generally only accepted in a 1-3 month window each year.

For more information and example appeals, see how to appeal your property taxes.

Useful Washington County Facts:

The median home value in Washington County is between $300,713.00 and $306,687.00. Property tax rates are based on property values.

How can I contact Washington County?

You can try contacting the Washington County local government directly with any issues the Assessor's Office can't solve. In many counties, certain property records such as deeds are kept in the county courthouse or county archives instead of at the tax assessors' office.

The county seat for Washington County is located in the in Hillsboro, which is where the Washington County Assessors' Office is also located. You can direct your general inquiries to Washington County with the contact info listed below.

Washington County Phone Number


Washington County Fax Number


Washington County Address

155 N 1St Ave Stop 11
Hillsboro, OR 97124-3001