BIM Implementation Cost Calculator 2025/26

BIM Level 2 (Building Information Modelling) refers to the collaborative use of separate discipline-specific 3D models that are combined into a federated model for coordination and clash detection. It involves a managed process of producing, sharing and using digital information throughout the project lifecycle. BIM Level 2 is defined by PAS 1192 (now superseded by ISO 19650) and has been mandated on all UK central government construction projects since 2016. It enables better coordination, fewer clashes on site, more accurate cost information and improved asset management.

The most common UK BIM software combination for architectural practices is: Autodesk Revit (primary authoring tool) + Navisworks (clash detection and model federation) + BIM 360 or Autodesk Construction Cloud (common data environment). ArchiCAD (with Open BIM approach) is a popular alternative, especially in smaller practices. Structural engineers typically use Tekla Structures or Autodesk Structural. M&E engineers use Revit MEP. All these tools can exchange IFC files, enabling interoperability. A Common Data Environment (CDE) such as BIM 360, Asite or Viewpoint is required for team collaboration.

For a small architectural practice (5-15 staff) transitioning from AutoCAD to Revit/BIM, expect 6-18 months to reach working BIM Level 2 competence. The transition includes: software procurement and installation (1-2 months); initial Revit training (3-5 days per person); development of practice templates, families and standards (2-4 months); first live project in Revit with external support (3-6 months). Productivity typically dips 20-40% during the transition before recovering and exceeding the previous CAD productivity level within 12-18 months.