Seattle project teams should involve a land surveyor during predevelopment when site dimensions or existing conditions could change feasibility, design, permitting, or right-of-way coordination. The clearest trigger is not a fixed calendar date. It is the point when the team begins relying on property lines, grades, access, utilities, trees, structures, or legal records to make design decisions.
Bring the surveyor in before assumptions become geometry
Early massing, access, grading, drainage, utility, and entitlement decisions often depend on the relationship between legal property information and physical site conditions. If those decisions are built on an assessor map, aerial image, old drawing, or unverified base file, the team may have to revisit them after field and record information is reconciled.
The goal of early survey involvement is not to map everything immediately. It is to identify which questions need reliable measurements now and which can wait for a later phase.
Five predevelopment triggers
Property lines or easements affect the concept
Bring in a surveyor when setbacks, access, shared driveways, recorded easements, encroachments, lot configuration, or right-of-way limits could influence the development envelope. Provide the current title report, legal description, recorded easement documents, prior surveys, and plats when available.
Topography affects layout or civil design
Grades and drainage relationships can shape building placement, access, retaining strategies, utility connections, and earthwork. The design team should identify the area and level of detail required rather than request a generic topographic survey.
Trees, structures, and neighboring conditions matter
Some Seattle review paths ask for an existing site plan or survey showing information beyond the proposed building footprint. Seattle’s land-use permit submittal checklist identifies items such as legal descriptions, easements, site plans, and, for applicable applications, topographic surveys. The exact requirements depend on the project and review path.
The project touches the public right of way
Street frontage, curb, sidewalk, access, utilities, or proposed improvements may require coordination with Seattle departments and the civil design team. Survey limits should reflect the actual right-of-way task, not stop automatically at the parcel boundary.
The team is preparing a permit base
Seattle’s permit guidance directs applicants to include a site plan with preliminary application materials for applicable construction and land-use work. Tip 103A provides site-plan preparation guidance and also warns applicants to confirm current requirements for their specific applications. A surveyor and design team should review the relevant checklist together before deciding what the base must contain.
What the first survey conversation should decide
| Question | Why it matters |
|---|---|
| What decision is next? | Feasibility, entitlement, schematic design, permit intake, and construction require different levels of information. |
| Which limits need to be mapped? | The useful area may include frontage, adjacent improvements, access, drainage, or off-site connections. |
| Is a boundary determination part of the work? | Topographic mapping and boundary surveying answer related but different questions. |
| Which records are available? | Title documents, easements, plats, and prior surveys can affect research and interpretation. |
| What will the design team receive? | CAD standards, control, datum, surface data, and PDF requirements should be settled before delivery. |
What can wait
Not every predevelopment question requires a final survey deliverable. A surveyor may help the team sequence work so that early mapping supports feasibility while later fieldwork, certifications, staking, or as-built documentation follow the design and approval path. That sequencing should be explicit in the proposal.
Build the base around the next decision
Seattle requirements and guidance change, and different project types follow different review paths. Project teams should confirm current requirements with the reviewing department and avoid treating a past project’s survey as a universal template.
Terrane supports land-use, commercial, and construction projects across the Puget Sound region. Teams preparing for Seattle predevelopment can share their site, approval path, records, and next design milestone with Terrane to define the survey sequence.
