As-Built Surveys in London
Verification of built work against design — steelwork, structures, and services recorded and compared to model, across London.
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Measured Building Surveys & Laser ScanningService Overview
An as-built survey records what has actually been constructed and compares it against the design intent. We capture the in-place geometry of structural steelwork, concrete frames, slabs, and installed services, then compare the measured reality against the issued model or drawings to flag deviations before they become expensive disputes. For steel-frame projects in particular, our as-built steel surveys verify column positions, base plate levels, and connection geometry so fabrication and follow-on trades proceed with confidence. The same dataset becomes the permanent, accurate record of the finished asset for handover, operation, and future maintenance.
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Key Benefits
Accuracy & Methodology
We scan or measure the constructed elements against the project control network, then overlay the captured geometry on the design model. Differences are colour-mapped and tabulated against the project's agreed tolerances, producing a clear report of where the build matches design and where it deviates, with the magnitude and direction of each variance.
Data & Deliverables
We export high-density spatial datasets ready for ingestion in leading architectural and civil engineering software.
- As-built CAD drawings and 3D models of the constructed work
- Deviation / tolerance reports comparing as-built to design model
- Registered point cloud of the constructed elements (.E57 / .RCP)
- Annotated verification report with pass/fail against agreed tolerances
Service Specific FAQ
Q: When in the programme should an as-built survey be done?
It depends on what you are verifying. Steel frames are best surveyed once erected and before cladding or follow-on trades begin, so deviations can still be corrected cheaply. Services and structures are often captured before they are concealed, giving you an accurate record of what sits behind the finishes.
Q: Can you compare the as-built data directly against our design model?
Yes. Provide the design model or drawings and the agreed tolerances, and we register the as-built capture into the same coordinate system to produce a direct, colour-mapped comparison and a tabulated deviation report.