As-Built Surveying Services

Accurate Measurement of What Was Actually Constructed

Geo Vision Surveying Inc provides as-built measurements and construction verification for contractors, engineers, developers and project managers across Southern Ontario. We document the actual position, elevation and dimensions of completed work, so your team can compare it with the design and move to the next stage with confidence.

What Is an As-Built Survey?

An as-built survey documents the actual position and elevation of construction after it has been installed or completed. The measurements let contractors, engineers and owners compare completed work with the design drawings and identify any differences before the project moves forward. As-built measurements can be taken during construction, at each stage, or at project completion, depending on what your contract or engineer requires.

What We Can Measure

Foundations and Structures

Foundation corners, walls, footings, columns, anchor bolts, structural elements and their elevations.

Grading and Elevations

Finished grades, swales, slopes, top-of-wall and drainage features, for comparison with the approved grading design. Explore grading surveys.

Utilities and Site Features

Visible or accessible utilities, manholes, catch basins, inverts, curbs, sidewalks, roads and other installed site features. Underground work should be measured before it is backfilled or covered.

Interiors and Complex Spaces

For building interiors and complex spaces, SLAM LiDAR scanning can capture existing conditions as a 3D point cloud.

Construction Verification

Completed elements checked against the design before the next phase of work begins. Explore construction layout.

When You Need an As-Built Survey

• Before backfilling pipes, structures or services
• Before the next trade builds on top of completed work
• When the engineer, municipality or contract asks for confirmation of what was built
• At project closeout, for record drawings
• When something looks wrong and you need facts before deciding on a fix

Why As-Built Surveying Matters

Accurate as-built measurements give project teams reliable information about completed work. They help verify constructed positions and elevations, identify differences from the design, document completed construction, support engineering review and reduce the risk of problems being found after more work has been built on top. When critical features will become covered or inaccessible, timing the survey correctly is especially important.

Equipment and Methods

We measure with robotic total stations and GPS/GNSS receivers, tied to the project's control and elevation reference so the results compare directly with the design. For interiors and dense structures we can add SLAM LiDAR scanning. The method is chosen to suit the features, access and required tolerance.

Deliverables

Depending on the project scope, deliverables may include:

• Field coordinates and elevations of the measured features
• A CAD as-built drawing
• A PDF comparison of design versus as-built values
• Point clouds (LAS) and DWG files where SLAM LiDAR is used

Our Process

1. Send us the project information. Provide the project address, current drawings and a description of what needs to be measured.
2. Confirm the scope. We confirm the required measurements, deliverables and the right timing for fieldwork.
3. Complete the field survey. Our crew measures the required construction features.
4. Deliver the information. You receive the agreed coordinates, drawings or reports.

Example: as-built elevation checks on a bridge project in Brantford and an as-built survey in Toronto. Background reading: as-built surveying in Toronto.