What Is a Point Cloud Survey?
A point cloud survey uses LiDAR to capture millions of precise 3D data points from a building, structure, or site, forming a dense digital cloud that replicates real-world geometry in millimetre-level detail.
A scanner fires laser pulses and records X, Y, Z coordinates — capturing up to 1 million points per second at ranges exceeding 300 metres. Multiple scans are merged (registration) producing a single complete point cloud in .e57, .las, or .rcp formats for use in Revit, AutoCAD, or Navisworks.
When to Use It
- Refurbishments and extensions where existing drawings don't match reality
- Listed and heritage buildings where precision and minimal intrusion matter
- BIM integration — generating LOD 400/500 Revit models
- Clash detection — preventing costly on-site variations before they happen
- Post-construction as-built records for facility management
- Civil and infrastructure surveys — road furniture, utilities, bridges
- Complex M&E environments — pipework, ducting, plant rooms
For QS work, the key value is reducing variation risk — a verified point cloud drastically reduces the "unknown unknowns" that drive cost overruns on refurb projects.
Accuracy
Modern scanners achieve ±2–3mm accuracy at ranges exceeding 300 metres — significantly better than traditional tape or total station surveys for complex geometry.
UK Providers Near You
| Provider | Location | Notes | | --- | --- | --- | | PointSCAN | Hertfordshire | Local specialist | | CloudPoint Survey | Covers Hertfordshire | Free quotes | | Measured Survey 365 | London (UK-wide) | Quote in 20 minutes | | Four Walls Group | London/UK | 2mm tolerance | | Cadmap Limited | Surrey/Guildford | BIM/LOD 500 | | SOCOTEC UK | National | Large firm, mobile mapping |
Typical Costs (UK 2025)
| Project Type | Typical Cost (ex VAT) | | --- | --- | | Small residential (point cloud only) | £250–£1,000 | | Full laser scan with point cloud | ~£3,500 | | Large/complex buildings | £5,000–£10,000+ | | On-site day rate | £750–£1,250/day | | CAD drawings | £300–£2,000/drawing |
Frequently Asked Questions
Q: What is the accuracy of a point cloud survey?
Professional LiDAR scanners achieve ±2–3mm accuracy at ranges exceeding 300m — significantly better than traditional measured surveys for complex geometry.
Q: When should I commission a point cloud survey?
Commission one when existing drawings don't match reality, for BIM coordination on refurbishments, for listed building surveys, or when you need clash detection before construction starts.
Q: What deliverables come from a point cloud survey?
Point cloud files (.e57, .las, .rcp), 2D AutoCAD drawings, 3D Revit/BIM models (LOD 200–500), IFC/COBie for FM, and digital twins for asset management.
Q: What does a point cloud survey cost?
Small residential: £250–£1,000+. Full laser scan: ~£3,500. Large complex buildings: £5,000–£10,000+.