Assessment & Taxation

The responsibilities of the Department of Assessment and Taxation include appraisal and assessment of property; collection of property taxes for all taxing entities; recording documents, land plats, issuing marriage licenses, records retention and administration of Elections.

New Passport Hours

The Passport Office will be closed during the lunch hour, beginning Thursday, April 20.  The new hours will be 9:00 am-12:00 pm and 1:00 pm-4:00pm, Monday through Friday.

The office is located at 161 NW Adams Ave, Hillsboro, OR 97124. Mailing address is 155 N First Avenue, Suite 130, Hillsboro, OR 97124.

Due to increased passport applicants, we are now accepting a limited number of applications per hour.  If you arrive at our office and we have reached our capacity for that hour, we will schedule you for a later return time.  We do not accept phone appointments at this time.


The GIS/Cartography section has moved to 231 W. Main Street, Hillsboro, OR 97124. Mailing address is 155 N First Avenue, Suite 230, Hillsboro, OR 97124.

Adams Annex


Assessment and Taxation has moved to 161 NW Adams Avenue, Hillsboro, OR 97124. Mailing address is 155 N First Avenue, Suite 230, Hillsboro, OR 97124.

Adams Crossing

Manufactured Structures Important Notice

Washington County is now processing manufactured home ownership transfers on behalf of the State of Oregon's Department of Consumer and Business Services (DCBS) at our office.  Our physical address is 161 NW Adams Ave, Suite 102, in downtown Hillsboro.

Please visit the website for DCBS at for information and the required forms necessary for your transaction.  If you have any additional questions, please contact our office at 503-846-8741.

Property Tax Statement

Many of you will be receiving your annual Property Tax Statement on or before October 25, 2016.  Payment for taxes are due on or before November 15, 2016.  Two drop boxes are located in the Adams Crossing Building, 161 NW Adams Ave., Hillsboro.  These boxes are available October 26th through November 15th.  The 24 hour drop box site is located at the rear of the building; the other drop box site is available Monday through Friday 8:30 am - 5:00 pm, located in the Adams Crossing Building lobby outside Room 102.

For general tax questions, please see Property Tax Questions.  If you are looking for specific tax data relevant to your property, please call our office at 503-846-8741.

Payments must be POSTMARKED on or before November 15, 2016.  Please return the lower portion of your tax bill(s) with payment in the enclosed envelope.  You may also send payments directly to:

Property Tax Payment Center
PO Box 3587
Portland, OR 97208-3587


Washington County
Assessment & Taxation 
155 N First Avenue, Suite 130 MS8
Hillsboro, OR 97124


Pay Taxes Online