When the Ground Matters: Knowing When You Need a Topographic Survey

A topographic survey is often the first, and most important, step in understanding what’s truly possible on your property. Whether you’re preparing for construction, planning a sale, or working through regulatory requirements, accurate elevation and terrain data can make or break a project.

If your property lies within or near a FEMA floodplain, a topo survey becomes essential. Topex Inc. provides the elevation data needed for Elevation Certificates, No‑Rise Certifications, and floodplain development reviews. These documents require precise measurements and, in many cases, engineering analysis to demonstrate compliance and ensure your project won’t increase flood risk.

Many HOAs require detailed site plans, such as Salishan Hills Residential Community, before approving additions, landscaping, or new structures. Topex Inc. not only collects the topographic data but can also stamp engineered site plans, ensuring they meet both HOA and municipal standards.

For homeowners and contractors planning driveways, Topex Inc. offers engineered driveway certifications, helping you meet grade, drainage, and access requirements, especially important on the steep, variable terrain of the Oregon Coast.

City planners and building officials rely on topo‑based site plans, public improvement designs for water and sewer, and stormwater hydraulic analysis reports for discharge permitting. These engineering components depend on accurate topographic mapping as their foundation.

In short, you need a topographic survey whenever elevation, drainage, or regulatory compliance intersects with your project. With both surveying and engineering capabilities, Topex Inc. delivers the complete packag, from field data to stamped plans