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Washington County, Oregon
Land Surveying in Washington County, OR
Boundary, topographic, and construction staking surveys that put the design on the ground accurately the first time. Washington County is covered on a project basis through our Seattle, WA regional hub.
- Dispatched from
- Seattle, WA regional hub · project-based mobilization
- Lead time
- Set in the proposal, with mobilization planned around your pour and earthwork schedule
- Laboratory
- Sugar Land, TX laboratory under chain of custody, or a mobile laboratory for large projects
- Reporting
- Reviewed and issued under a documented quality system; formatted for owner, engineer, and building-official review
- Serving
- Washington County, OR — Portland, Eugene, Salem
- Coverage
- Oregon statewide · 27 regional hubs
- Technicians
- ACI- and NICET-certified field staff; licensed professionals in Oregon
- Call us
- (346) 420-5425
Scope
Survey services in Washington County
- Boundary and title surveys for acquisition and permitting
- Topographic surveys for civil design
- Construction staking: building corners, utilities, paving, and grades
- As-built surveys for closeout and conveyance
Full scope, standards list, and pricing basis: Land Surveying.
Local conditions
Survey conditions in Washington County
Washington County is one of the fastest-growing counties in Oregon, absorbing substantial residential, mixed-use, and light industrial development as the Portland metro area expands westward into the Tualatin Valley. That growth presses onto terrain that shifts quickly — from the flat valley floor near Hillsboro and Beaverton to the steeper, tree-covered slopes of the Chehalem Mountains and the Coast Range foothills. Accurate survey control matters at every stage: a boundary error discovered during grading costs far more to correct than one caught before a single stake is set. Our field crews provide boundary, topographic, and construction staking surveys sized to fit the project schedule — residential subdivisions, commercial pads, utility corridors, and public-works projects alike. Coverage in Washington County is dispatched through our Seattle regional hub. We coordinate directly with contractors, engineers, and owners to deliver reliable, usable deliverables that keep design intent intact from plan sheet to finished grade.
The Tualatin Valley floor is underlain in many areas by fine-grained alluvial and lacustrine soils that can exhibit seasonal settlement and drainage sensitivities, making precise elevation control on topographic surveys particularly important for grading and stormwater design. Oregon's wet season runs roughly October through April, so scheduling control-point establishment and benchmark ties during drier months reduces the risk of access delays and instrument-setup complications on low-lying or sloped sites.
FAQ · Washington County
Washington County requires a recorded plat for our subdivision — what survey work feeds into that process, and how do we sequence it with the county?
A boundary survey establishing lot lines, easements, and monumentation must be completed and stamped by an Oregon-licensed Professional Land Surveyor before the plat can be submitted to Washington County Land Use and Transportation for review. Topographic data collected during the same field mobilization can support concurrent civil design, reducing total schedule. We recommend confirming the county's current submittal checklist early, as requirements for closure tolerance and monument type are specific.
Our site in the Tualatin Valley has areas of standing water after rain events. How does that affect topographic survey accuracy and scheduling?
Saturated or inundated ground does not directly affect GPS or total-station angular accuracy, but it can obscure breaklines, make rod-pole seating unreliable on soft soils, and restrict equipment access. We account for this by scheduling field work during drier windows where possible and flagging areas where spot elevations were taken at the water surface rather than natural grade — notations that are critical for accurate stormwater and grading design.
We are grading a tilt-up industrial pad near Hillsboro. At what project milestones do we need construction staking, and how much lead time should we build in?
Typical milestones requiring staking for a tilt-up project include rough grading (slope stakes and blue-tops), building footprint and column lines, slab control, and utility alignments. Each phase should be requested before that scope mobilizes — not simultaneously. Because crews are dispatched from our Seattle hub to Washington County on a scheduled basis, contact us at least five business days before each staking phase; tighter windows may not be accommodatable without prior arrangement.
Which office covers survey in Washington County, OR?
Field work in Washington County is dispatched through the Seattle, WA regional hub, about 147 miles away. Laboratory testing is performed in Sugar Land, TX under chain of custody, or in a mobile laboratory mobilized to large Washington County projects.
Are the technicians you send to Washington County certified?
Field sampling and testing in Washington County are performed by our ACI- and NICET-certified technicians. Survey engineering and professional services are delivered with professionals licensed in Oregon, coordinated under one proposal.
Scheduling & proposals
Need land surveying in Washington County?
Call to schedule a technician, or send project documents for a written proposal.