Washington County, Oregon Tax Assessors' Office

Where is the Washington County Tax Assessor's Office?

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.

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

503-846-8681

Washington County Fax Number

503-693-4545

Washington County Address

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

Useful Washington County Links:

• Washington County Assessors' Office Homepage
• Property Tax Search Tool & GIS Map
• Washington County Search by address or tax lot number
• Washington County Search by address or street intersection
• Washington County Government Homepage
• GIS Parcel Search Search