Scan-to-BIM Survey Specification

Our Full Workflow, Standards & Deliverables for Accurate As-Existing BIM Models

At Tower Surveys 3D Modelling, we specialise in delivering highly accurate Scan-to-BIM models for architects, designers, engineers, contractors and asset owners across the UK. To support consistent quality across every project, we maintain a detailed Scan-to-BIM Survey Specification, outlining our Scan-to-BIM workflow, UK BIM modelling standards, modelling requirements, accuracy tolerances and survey deliverables.

This page provides a complete overview of our approach and links to the individual technical sections that make up our specification. You can also download the full PDF for offline reference.

What This Specification Covers

Our Survey Specification describes in detail how we:

Capture accurate point cloud data
Register, clean and verify scan outputs
Develop Revit models to LOD2–LOD4
Ensure compliance with UK BIM modelling standards
Verify accuracy through our ISO-aligned QA process
Deliver high-quality BIM models, point clouds and supporting data

Together, these form a robust, transparent and auditable methodology for producing as-existing BIM models you can rely on for design, coordination and asset management.

Why Scan-to-BIM Matters

A dependable BIM model begins with dependable survey data. Our approach ensures that:

Every model originates from high-accuracy laser scanning
All geometry reflects the verified as-existing condition
Tolerances and LOD requirements are known in advance
Survey uncertainty is clearly defined
Design teams receive a model built on measured reality, not assumption

Whether you are delivering early-stage feasibility, detailed design or facilities management, the quality of your BIM model directly affects project outcomes.

Our Scan-to-BIM Workflow

1. Project Briefing

Understanding client input requirements, required deliverables, project constraints, coordinate systems and LOD expectations.

2. Site Survey

High-resolution terrestrial laser scanning to capture complete as-existing geometry.

3. Registration & Point Cloud Processing

Cleaning, aligning and validating scan data to ensure accuracy and consistency.

4. BIM Modelling in Autodesk Revit

Developing 3D models to the agreed Level of Detail (LOD2–LOD4), aligned with UK BIM standards.

5. Quality Assurance

Comprehensive internal review against point cloud, tolerances, modelling standards and naming conventions.

6. Delivery of BIM Outputs

Including Revit models, point clouds, TruView/360° imagery and optional 2D deliverables.
Each stage is covered in detail on the supporting pages linked below.

What You Receive

Every Scan-to-BIM project includes:

Registered point clouds in RCS/RCP (plus optional BIM data formats)
High-quality as-existing Revit models
TruView or 360° panoramic imagery
Optional 2D drawings derived from the 3D model
Clearly documented tolerances and modelling assumptions
A transparent workflow that teams can trust

Additional deliverables such as IFC, DWG exports, MEP modelling and metadata integration can be provided on request.

Technical Sections of Our Specification

To help clients and project partners quickly access the information they need, our Survey Specification is broken down into dedicated technical pages:

These pages provide full technical detail behind our methodology and demonstrate the quality and structure of our BIM delivery framework.

Why Clients Choose Our BIM Deliverables

Design teams, contractors and asset managers choose Tower Surveys 3D Modelling because:

Our models are accurate, consistent and reliable
All modelling decisions are backed by documented standards
We work transparently with measurable tolerances
Our workflow is built on real-world experience and modern digital surveying technology
Deliverables integrate seamlessly with Revit, CAD, IFC, Navisworks and coordination workflows

When accuracy matters, a structured and documented approach is essential. Our Survey Specification shows exactly how we deliver it.

Download the Full Survey Specification (PDF)

You can download the complete, detailed Survey Specification here:

Tower Surveys 3D Modelling – Scan-to-BIM Survey Specification (PDF)

This includes the full workflow diagrams, accuracy tables, LOD matrices, technical requirements and appendices.

Or Appendix only to fill out and return

Scan-to-BIM Survey Specification (PDF)

Appendix A–B.pdf

Need a Quote or Have a Project to Discuss?

We provide rapid quotations and can advise on scope, deliverables, LOD levels and expected workflows.
Contact us today to discuss your Scan-to-BIM requirements.