As-Built Surveys & Laser Scanning for General Contractors in Montréal
Capture site geometry before, during and after construction so fit problems, verification disputes and closeout documentation stop eating margin.
Get a Quote for Your Project
Send us the building location, approximate square footage and required deliverables. We'll review the scope and get back to you.
For a general contractor, existing-condition data is a margin issue. Every dimension that turns out to be different from the drawings becomes a change order conversation, a resequenced trade, or a fabricated element that does not fit. The cost of measuring first is almost always smaller than the cost of finding out later.
Reality capture fits into three points in a build. Before work starts, to verify the geometry the design was based on. During construction, to record what is about to be closed up behind finishes. At closeout, to produce as-built documentation that reflects what was actually installed.
The practical benefit on site is speed: capture is quick, does not require trades to stop work for long, and leaves a record that can be measured from later without another site visit.
What usually goes wrong for general contractors
Design geometry that does not match the site
A pre-construction survey checks the design's assumptions against the building before the schedule and subcontracts depend on them. Discrepancies found at this point are a scope conversation, not a claim.
In-wall and above-ceiling work disappearing
Once finishes close, routing and structural conditions become invisible. A progress capture at rough-in gives a measured record that supports both coordination and closeout.
Prefabrication and fit risk
Off-site fabrication depends on the receiving condition being exactly what was assumed. Measured geometry lets fit be confirmed before the element is built.
Closeout documentation that satisfies the owner
As-built sets assembled from marked-up drawings are slow to produce and hard to defend. Documentation derived from captured data is faster to compile and traceable back to a measured record.
How a project runs
- 01Agree the capture point in the schedule: pre-construction, rough-in, or closeout.
- 02Plan access around active trades so capture does not stall the sequence.
- 03Capture, typically working around live work rather than stopping it.
- 04Registration and quality control.
- 05Deliver drawings, models or the point cloud, depending on what the next decision needs.
What you receive
- Pre-construction existing-condition drawings and point cloud
- Progress capture records at rough-in for coordination and closeout
- As-built drawing sets in DWG and PDF
- Point cloud retained for verification and dispute documentation
Services most relevant to this workflow
Guides worth reading first
Written by the DCMS team to answer the questions that usually come up before a scope is agreed.
Frequently asked questions
Do trades have to stop work while you scan?+
Usually not. Capture is planned around active work, and crews move through a space rather than occupying it. Areas with heavy activity may need a short window or a return pass.
When in the schedule should we capture?+
It depends which risk you are managing. Pre-construction capture protects against design-to-site mismatch; rough-in capture protects the record of concealed work; closeout capture produces owner documentation.
Can the survey be used to support a change order?+
A measured record is significantly more defensible than a recollection or a tape measurement. The point cloud stays available as evidence of the condition on the day it was captured.
Can you capture exterior works and site levels too?+
Yes. Exterior areas, roofs and site surfaces can be captured in the same mobilisation as interior work.
Get a Quote for Your Project
Send us the building location, approximate square footage and required deliverables. We'll review the scope and get back to you. General Contractors