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Assessor Approval for Plats and Tax Lot Boundary Changes
Under Oregon law assessors approve all plats (subdivision, partition or condominium) or changes in tax lot lines.
Service
Survey
Transportation
Cooperative CORS Data - Base Station - JIME
The National Oceanic and Atmospheric Administration Continuously Operating Reference Stations Network provide Global Navigation Satellite System data, supporting 3-D positioning, meteorology, space weather and geophysical applications.
Information
Survey
Cooperative CORS Data - Base Station Data Files
Cooperative CORS Data - Base Station; LUT app
County resource
Survey
County Buildings and Parking Map
List of Washington County service buildings and public parking lot information in Downtown Hillsboro (PDF 659.84 KB)
County resource
Facilities Operations and Maintenance
Medical Reserve Corps Volunteer
How to get involved with Washington County's Medical Reserve Corps volunteers.
Information
Public Health Emergency Preparedness
Health
Monument Boxes
Monument boxes are required for all public centerline monuments.
Information
Survey
Transportation
Partition Plat Checking Calculator
Calculator to estimate partition plat checking costs.
County resource
Survey
Plat Review
Plats are most often viewed to determine dimensions of a lot within a platted area.
Service
Survey
Business
Public Land Corner
Public land corners mark the boundary corners of public and private land. These are usually at the section corners, one-quarter section corners and donation land section corners.
Information
Survey
Subdivision Plat Checking (Post-monumented) Calculator
Calculator to estimate subdivision plat checking (Post-monumented) costs.
County resource
Survey
Subdivision Plat Checking (Pre-monumented) Calculator
Calculator to estimate subdivision plat checking (Pre-monumented) costs.
County resource
Survey
Survey Explorer
Contains County Surveyor's Office records. Includes address, tax lot, survey, plat, public land corner, benchmark, section map, tax map, county road, road dedication and vacation, geodetic control point, and donation land claim data.
County resource
Survey