Scan-to-BIM in London: What You Need

Scan-to-BIM in London: What You Need

Scan-to-BIM in London uses 3D laser scanning to capture existing buildings as precise point clouds, which are then converted into intelligent Revit BIM models for design, coordination, and construction. London projects — with their Victorian and Edwardian terraces, complex listed buildings, dense urban sites, and strict planning requirements — frequently need Scan-to-BIM for accurate as-built data before design can proceed.

What Is Included in a Scan-to-BIM Survey

| Stage | Activities | | --- | --- | | 1. Pre-scan planning | Scope definition, LOD agreement, access coordination, survey control setup | | 2. 3D laser scanning | 50–200+ scan positions capturing millions of points with sub-centimetre precision; HDR photography for colourisation | | 3. Data processing | Registration, QA checks, noise removal, coordinate system assignment (OS grid or local control) | | 4. BIM modelling | Tracing point cloud in Revit to create parametric architectural, structural, and MEP elements | | 5. Quality assurance | Model-vs-point-cloud deviation analysis, clash detection, and completeness verification |

2025 Costs in London

| Project Type | Cost (ex VAT, 2025) | Best For | | --- | --- | --- | | Small residential (3-bed house) | £800–£2,500 | Renovations and extensions | | Medium commercial (office floor) | £3,000–£10,000 | Refurbishments and BIM models | | Large or complex (hospital, factory) | £10,000–£50,000+ | Full-site digital twins |

BIM Modelling Add-on (per sq ft)

| LOD Level | Cost (approx) | Best For | | --- | --- | --- | | LOD 200 | £0.40–£1.20 per sq ft | Feasibility studies | | LOD 300 | £1.20–£2.80 per sq ft | Design development | | LOD 350 | £2.00–£4.00 per sq ft | Clash detection | | LOD 400 | £2.80–£5.60+ per sq ft | Fabrication |

Cost Factors in London

| Factor | Impact | | --- | --- | | Building complexity | Heritage buildings add 15–30% | | Night or weekend work | Plus 20% | | Scaffolding requirement | Plus 15% | | Live or occupied environments | Plus 25% | | Urgency | Express (3–5 days) plus 30%, emergency (24–48 hours) plus 50% |

Deliverables

| Deliverable | Format | Details | | --- | --- | --- | | Registered point cloud | E57, RCS, LAS | Georeferenced to OS grid | | Revit BIM model | RVT | LOD 300–350 typical for architecture | | 2D drawings | DWG | Plans, sections, elevations at agreed scales | | Area schedules | PDF and DWG | NIA and GIA compliant with RICS Property Measurement (2nd ed.) | | IFC and PDF exports | IFC and PDF | For collaboration and sharing | | COBie data | XLSX | Asset data schedule for FM (optional) |

LOD Levels Explained

| LOD | Accuracy | Typical Use | Timeline (50,000 sq ft) | | --- | --- | --- | --- | | LOD 200 | ±150–300mm | Feasibility and concept studies | 2–4 weeks | | LOD 300 | ±75–150mm | Design, planning, and technical documentation | 4–8 weeks | | LOD 350 | ±50–100mm | Design coordination and clash detection | 6–10 weeks | | LOD 400 | ±25–50mm | Fabrication and construction | 8–12 weeks | | LOD 500 | As-built verification | FM, operations, and asset management | Project-dependent |

Point Cloud Formats

| Format | Software Compatibility | | --- | --- | | E57 | Vendor-neutral — universal compatibility | | RCS or RCP | AutoCAD ReCap — native to Revit and AutoCAD | | LAS or LAZ | LiDAR — GIS and drone workflows | | PTS or PTX | Leica Cyclone — survey-specific processing |

Why London Projects Need Scan-to-BIM

| Project Type | Why Scan-to-BIM Is Essential | | --- | --- | | Victorian and Edwardian terraces | Irregular geometry, settled walls, multiple additions require accurate measurement | | Listed buildings | Non-contact scanning preserves fragile historic fabric for Listed Building Consent | | Basement excavations | Accurate as-built dimensions for structural calculations and Party Wall awards | | Dense urban sites | Adjacent building positions for party wall monitoring and design | | BIM Level 2 requirement | ISO 19650 compliance for public sector and large commercial projects | | MEP coordination | Existing services in walls and ceilings for clash detection before installation | | Heritage conservation | Detailed 3D record for conservation planning and condition monitoring |

When to Commission Scan-to-BIM in London

| Project Type | Scan-to-BIM Recommended? | | --- | --- | | Major refurbishment | Yes — accurate existing conditions for design and coordination | | Heritage or listed building | Yes — non-contact measurement for fragile structures | | BIM Level 2 requirement | Yes — ISO 19650 and UK BIM Mandate compliance | | MEP coordination | Yes — clash detection before installation | | FM and asset management | Yes — LOD 500 as-built model for operations | | Basement excavation | Yes — accurate structural dimensions for engineering | | Loft conversion | Yes — roof geometry and floor structure for feasibility |

Frequently Asked Questions

Q: What is the difference between Scan-to-CAD and Scan-to-BIM in London?

Scan-to-CAD produces 2D floor plans, elevations, and sections. Scan-to-BIM produces a 3D intelligent model with structured data (wall types, materials, systems, areas) that can be queried, edited, and coordinated. BIM models cost more but provide significantly more value for design coordination and FM — particularly important for complex London buildings.

Q: How long does Scan-to-BIM take in London?

Site scanning: 1–3 hours for standard residential properties. BIM modelling: 1–3 weeks depending on size, LOD, and complexity. Large commercial projects may take 4–8 weeks. London site access and logistics can extend timelines.

Q: What LOD do I need for a planning application?

LOD 200–300 is typical for planning applications and design work. LOD 350–400 is needed for construction coordination and clash detection. Always specify LOD per zone — not a single LOD for the whole model.

Q: Can I use an existing point cloud?

Yes — if you have point cloud data in E57, RCP, RCS, or other format, the Scan-to-BIM company can model from that. Conversion fees may apply if re-processing is needed.

Q: What Revit version will I receive?

Confirm before commissioning. Revit 2023 and 2024 are current standards. Always check your team's Revit version for compatibility.

Q: Is Scan-to-BIM required for Listed Building Consent?

Not always mandatory, but highly recommended. Laser scanning provides non-contact measurement that preserves fragile historic fabric — important for Grade I, Grade II*, and Grade II listed buildings in London.

Q: What is the cost of a BIM model per square metre?

Approximately £7 per m² for LOD 300 (architectural). Approximately £10 per m² for LOD 400 (full MEP). A typical 500m² London office floor would cost £3,500–£5,000 for an architectural BIM model.