BIM LEVELS

BIM Levels (Building Information Modeling Levels) describe the maturity of information management within a construction project. Each level defines how project stakeholders (architects, engineers, contractors, investors, etc.) create, share, and manage data in a digital environment.

The BIM maturity model is typically divided into four levels: 0 to 3.

Level 0 – LOW collaboration

• The lowest level of digitization.
• Drawings are produced in 2D CAD (e.g., AutoCAD).
• Data is stored separately, with very limited collaboration.
• There is no shared information or coordination between disciplines.

Level 1 – Partial COLLABORATION

• Some project elements are modeled in 3D, while others remain in 2D.
• Data follows standardized formats, but integration is minimal.
• Basic information sharing exists, yet each discipline still manages its own data.

Level 2 – FULL COLLABORATION

• Each discipline creates its own 3D model, which is shared in a Common Data Environment (CDE).
• Information exchange uses open formats such as IFC (Industry Foundation Classes).
• Coordination and clash detection between models are carried out.
• Many governments (e.g., the UK) have made BIM Level 2 mandatory for public projects.

Level 3 – FULL IntegratION

Often referred to as “Open BIM” or “iBIM (Integrated BIM)”.

Represents a fully integrated, real-time BIM environment.

All project participants work on a single shared model.

Data is managed in cloud-based systems and continuously updated.

Supports full lifecycle management — from design and construction to operation and maintenance.