2025 Survey Costs (ex VAT)
| Property | Standard | Fast Track (+25%) | Rush (+50%) | | --- | --- | --- | --- | | 2–3 bed | £400–£600 | £500–£750 | £600–£900 | | 4+ bed | £500–£800 | £625–£1,000 | £750–£1,200 | | Commercial | £800–£1,500 | £1,000–£1,875 | £1,200–£2,250 |
Survey Deliverables Reference
| Deliverable | Format | Use | | --- | --- | --- | | Floor plans | DWG + PDF | Design reference | | Elevations | DWG + PDF | Planning submission | | Sections | DWG + PDF | Building regulations | | Site plan | DWG + PDF | Planning boundary |
LiDAR Scanning for Construction: A Practical Field Guide
LiDAR — Light Detection and Ranging — is the technology behind 3D laser scanning. It captures millions of measurement points to create a detailed digital record of buildings and sites.
This practical field guide explains LiDAR scanning for construction professionals who need to understand the technology without becoming surveyors.
What Is LiDAR?
LiDAR works by emitting laser pulses and measuring the time they take to return from the nearest surface. The scanner rotates, emitting millions of pulses in a full circle. Each pulse that returns provides a distance measurement — a point in 3D space.
LiDAR scanners are mounted on tripods, poles, or vehicles. They capture data from multiple positions, which are combined to create a complete 3D model of the environment.
The result is a point cloud — millions of points, each with X, Y, Z coordinates, representing the surfaces captured by the scanner.
How LiDAR Scanners Work
A LiDAR scanner consists of several components:
Laser emitter: Emits short pulses of laser light. Modern scanners use Class 1 lasers that are safe for use in occupied spaces.
Rotating mirror: Reflects the laser pulse in a full circle, creating a 360-degree field of view.
Detector: Measures the returning laser pulse. The time of flight — the time between emission and return — is converted to a distance.
Position sensor: Records the angle of the mirror at the time of each measurement, determining the direction of each point.
Control unit: Records all measurements with timestamps and manages data storage.
Modern scanners capture up to two million points per second. A single scan position captures millions of points in minutes.
Types of LiDAR Scanners
Different scanners suit different applications:
Phase-based scanners: Measure the phase shift of the returning laser to calculate distance. Fast, accurate, and suitable for most construction applications. Examples: Leica RTC360, Faro Focus.
Time-of-flight scanners: Measure the time of flight of individual laser pulses. Longer range but slower. Used for large sites and outdoor applications.
Hybrid scanners: Combine phase and time-of-flight methods. Suitable for both indoor and outdoor use.
Mobile scanners: Mounted on vehicles or backpacks for rapid scanning of large areas. Used for road, rail, and urban surveys.
For construction applications, phase-based scanners are most common.
LiDAR Scanning on Construction Sites
LiDAR scanning on construction sites serves several purposes:
As-built surveys: Capture the as-built condition of structures during and after construction. Verify construction against design.
Progress monitoring: Regular scans track construction progress and identify discrepancies.
Site surveys: Capture site topography, structures, and features for design and planning.
Clash detection: Scan data used to verify that construction matches design and identify clashes before they cause problems on site.
FM data: As-built scans provide data for facilities management and future maintenance.
Scanning Workflow
The LiDAR scanning workflow has several stages:
1. Planning: Define scan scope, identify scan positions, plan access and timing.
2. reconnaissance: Visit the site to confirm access, identify scan positions, note any restrictions.
3. Scanning: Set up scanner at each position. Capture data. Move to next position. Repeat.
4. Registration: Combine individual scans into a single point cloud. Register using common features between scans.
5. Processing: Clean the point cloud, remove noise, prepare for use.
6. Deliverable production: Create drawings or BIM models from the point cloud.
Point Cloud Registration
Individual scans must be combined into a single coordinate system. Registration uses common features between scans — walls, corners, structural elements — to align the data.
Registration is typically automated using software algorithms. Manual intervention is needed for challenging environments — repetitive geometry, low feature contrast, obstructed views.
Registration accuracy affects the quality of the final data. Poor registration means inaccurate models.
Point Cloud Density and Accuracy
Two key specifications for LiDAR scanning:
Point density: Measured in points per square metre. Higher density captures more detail but requires more scans and processing time.
Accuracy: Measured in millimetres. Defined as the difference between the true position and the measured position.
Typical construction scanning specifications:
Standard accuracy: 10mm accuracy, 25 points per square metre. Sufficient for most design and construction documentation.
High accuracy: 5mm accuracy, 50 points per square metre. For detailed design, heritage, and complex geometry.
Verification accuracy: 2mm accuracy. For structural verification and quality assurance.
Limitations of LiDAR Scanning
LiDAR has limitations:
Cannot see through surfaces: Hidden areas — inside cupboards, behind furniture, within shafts — are not captured.
Struggles with dark surfaces: Very dark surfaces absorb laser light and may not return a reliable signal.
Reflective surfaces: Mirrors, glass, and highly reflective surfaces can return false readings.
Weather limitations: Heavy rain, fog, or dust can affect outdoor scanning.
Moving objects: People and equipment moving during scanning create noise in the point cloud.
Understanding limitations helps plan effective scanning and avoid disappointments.
LiDAR Scanning Costs
LiDAR scanning costs depend on site size, complexity, and required deliverables:
Scanning only: from around 300 to 800 pounds per day depending on equipment used.
Point cloud delivery: from around 500 to 1,500 pounds depending on site size and processing requirements.
Scan-to-BIM: from around 1,000 to 3,000 pounds depending on LOD and complexity.
All icelabz quotes are fixed-fee with no hidden charges.
When to Use LiDAR Scanning
LiDAR scanning is appropriate when:
Complex geometry: Buildings with complex shapes, curved surfaces, or intricate features benefit from comprehensive LiDAR capture.
Heritage buildings: Detailed recording of heritage buildings requires high-density LiDAR scanning.
Tight timescales: LiDAR scanning captures data faster than traditional survey methods. Use it when speed matters.
Verification requirements: LiDAR provides objective data for verifying construction against design.
Large sites: Mobile LiDAR scanning captures large sites rapidly.
BIM projects: LiDAR provides the data foundation for BIM models on refurbishment projects.
For simple, straightforward buildings, conventional measured surveys may be more cost-effective.
Preparing for a LiDAR Scan
To prepare for a LiDAR scan:
Define scope clearly: Identify what will be scanned, what deliverables are needed, what accuracy is required.
Ensure access: Confirm access to all areas. Remove obstructions where possible.
Plan scan positions: Identify positions that provide complete coverage with no hidden areas.
Schedule scanning: Coordinate scanning with site operations. Occupied spaces may require out-of-hours scanning.
Brief the scanning team: Provide drawings, existing surveys, and site information to help plan the scan.
Good preparation ensures efficient scanning and quality data.
Choosing a LiDAR Scanning Provider
Choose a LiDAR scanning provider based on:
Equipment: Modern scanners from Leica, Faro, or similar manufacturers. Check scanner specifications.
Experience: Experience with similar projects. Ask for examples.
Deliverables: Confirm deliverables match your requirements — point cloud format, BIM LOD, drawing outputs.
Accuracy: Confirm accuracy standards will be met.
Fixed-fee pricing: Fixed-fee pricing provides budget certainty.
icelabz provides LiDAR scanning services for construction projects. All work is fixed-fee with no hidden charges.
Fixed-Fee LiDAR Scanning from icelabz
icelabz provides fixed-fee LiDAR scanning for construction projects. Scan data is delivered as point clouds, BIM models, or drawings as required.
Contact icelabz with your project requirements for a fixed-fee quote.