Scan to BIM for Homeowners Planning an Extension: When 3D Scanning Saves Time
3D laser scanning gives homeowners accurate measurements for extensions — avoiding expensive mistakes before design starts.
What Homeowners Get
| Deliverable | Format | Purpose | | --- | --- | --- | | Point cloud | E57, RCP | Full 3D capture | | Floor plans | DWG, PDF | Planning application | | Levels | CSV | Drainage design |
When Homeowners Need Scan to BIM
| Extension Type | Scan to BIM? | | --- | --- | | Basement excavation | Yes — essential | | Side return extension | Yes | | Roof extension | Measured building sufficient | | New build | Topographical + measured |
2025 Costs (ex VAT)
| Property Size | Scan to BIM | | --- | --- | | 2–3 bed terrace | £900–£1,500 | | Semi-detached | £1,200–£2,000 | | Detached | £1,800–£3,000+ |
When Homeowners Should Use Scan to BIM for an Extension
For homeowners planning an extension, scan to BIM is the right choice when the extension involves significant structural work, complex geometry, or BIM coordination with the wider design team. The four typical extension types and whether scan to BIM is needed are basement excavation (yes — essential, because the basement works affect the wider site drainage, ground conditions, and the party wall with a neighbour, and a scan to BIM model is the only way to coordinate the new basement with the existing structure and the structural engineer's design), side return extension (yes, because the side return typically involves removing part of the existing structure and the new extension tying into the existing building, and a scan to BIM model provides the existing geometry for the architect's design and the structural engineer's calculation), roof extension (measured building sufficient, because the roof extension typically does not require BIM coordination and a measured building survey at 1:50 or 1:100 with floor plans, sections, and roof geometry is sufficient for the planning application and the design), and new build (topographical and measured, because the new build needs the site levels from a topographical survey and the existing building dimensions from a measured building survey if there is an existing building to capture). To commission a scan to BIM survey, send a brief covering the property address, the proposed extension type and scale, the deliverable list (raw E57 or LAS point cloud, registered and cleaned point cloud, registered cloud aligned to a chosen coordinate system, 2D CAD plans and elevations derived from the cloud, Revit or IFC BIM model at LOD 300 or 350 for design coordination, levels as CSV for the drainage design), the deliverable format (E57, RCP, DWG, RVT, IFC, CSV), the coordinate system (OS National Grid with Ordnance Datum Newlyn heights is the UK convention), the accuracy band required (typical scan to BIM accuracy is plus or minus 5 to 10 mm for downstream design work), and the target turnaround. icelabz responds with a fixed-fee quote within twenty-four hours, and the on-site attendance is typically scheduled within five to ten working days of instruction. A typical site visit takes one to three hours. The cost bands by property type are 2 to 3 bed terrace (900 to 1,500 pounds ex VAT), semi-detached (1,200 to 2,000 pounds ex VAT), and detached (1,800 to 3,000+ pounds ex VAT). A signed accuracy statement is the QA evidence for downstream design, planning, and building control use, and all icelabz scan to BIM surveys are issued under the RICS Measured Surveys of Land, Buildings and Utilities standard (3rd edition).