Drone As-Built Surveys.
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Compare what's actually on site against the design model. Our drone-and-scan drone operators capture a measurable point cloud of the finished build and overlay it against your BIM — exposing every deviation before it becomes a snagging dispute.
“For every verified profile, we record the insurance and CAA credentials supplied at the time of review.”
Peter Leslie · Founder & GVC Drone Pilot
Trusted by site managers & agencies across the UK
Finished the build?
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Drone as-built survey specialisms
Dimensionally-accurate records of what actually got built — for handover, O&M and dispute resolution.
Dimensional verification
Scaled orthomosaics and elevations checked against issued-for-construction drawings.
Get verification quotesPoint cloud capture
Registered point clouds ready for import into Revit, Navisworks and AutoCAD.
Get point cloud quotesDiscrepancy reporting
Overlaid deviation maps flagging where site reality differs from the design intent.
Request discrepancy report"Built to design" is rarely built to design.
Between design intent and handover, every project accumulates silent deviations. An as-built drone survey surfaces them before you sign off and pay retention.
Hidden Deviations at Handover
Beams shifted by 40mm, slab levels off by 25mm, MEP runs dropped through the wrong chase. By the time your FM team notices, the retention is paid and the subbie is on another job.
Disputed Final-Account Claims
Retention disputes revolve around what was actually built versus what was specified. A dated as-built point cloud is a legally robust record that cuts these conversations short.
FM Inheriting Wrong Drawings
A facilities team working from design drawings that don't match reality will drill into the wrong places, order the wrong parts, and lose hours every week. A Scan-to-BIM as-built fixes that for the life of the asset.
An as-built is only useful if you can actually compare it to the design.
By Peter Leslie, Founder & GVC Drone Pilot
Connect on LinkedInLots of drone pilots will sell you a point cloud. Far fewer will hand you a deviation report that you can take to a QS and settle a final-account dispute with.
The drone operators I match to as-built work run their scans and drone flights through tools like Autodesk ReCap, Navisworks, or Leica Cyclone — registering the finished-build point cloud directly against the federated BIM model and exporting a coloured deviation report.
You don't just see what's there. You see exactly where reality has parted company with the design.
BIM-Literate Drone operators
Scan-to-BIM & Clash Detection
Reality vs design, laid out for your QS and FM team.
Three deliverables that travel from site hut to boardroom.
Point Cloud vs CAD Overlay
The registered as-built point cloud overlaid against the federated BIM or CAD model in Navisworks or BIMcollab. Orbit, section, and measure the real vs intended geometry side by side.
Deviation Report
A colour-coded heat map and tabulated list of every deviation above a user-set tolerance (typically ±10mm, ±25mm, ±50mm). The single document that turns a dispute into a closed-out item.
Scan-to-BIM Model
Optional Scan-to-BIM deliverable at LOD 200 or 300 — an updated Revit model reflecting the asset as it actually stands. The version your FM team should be running for the next 30 years.
From final fix to deviation report in 3 steps.
Scoped around handover, not fitted in between other jobs.
Share the BIM
Upload your federated model and nominate the tolerances you care about (structural, MEP, finishes). We brief the right scan-plus-drone operator.
Capture the As-Built
The drone operator flies the exterior and scans the interior in a single coordinated visit, registering both datasets against shared control.
Compare & Report
Registered cloud is compared to the BIM. You receive the overlay, the deviation report, and — if requested — an updated Scan-to-BIM model.
As-Built Survey FAQ
Scan-to-BIM, clash detection, and how as-builts fit into your close-out process.
What is Scan-to-BIM and do I actually need it?
Can you do clash detection between the as-built and the design model?
When in the programme should we book the as-built?
What deliverable format will my QS or FM team actually use?
Close out cleanly.
Post one structured brief so relevant profiles and current availability can be reviewed.
Start Your As-Built Survey Brief
Add the service, full project postcode, timing and project details so we can review a useful brief.
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