The public is encouraged to use the alternate options of phone, email, US Postal Service or online.

The Cartography staff is responsible for tracking ownership of all real property in the County and maintaining a complete set of taxlot maps which adhere to state cadastral mapping standards.  Most documents recorded in the County are reviewed by Cartography to determine if they involve a change in property ownership or property boundary.

Cartography Address
Washington County
Assessment & Taxation Department
Cartography Division
155 N. First Ave., Ste. 200 MS 9
Hillsboro, OR 97124

Phone:  (503) 846-8871
E-Mail to: