BIM Level of Development Explained: LOD 100 to LOD 500
This page is a placeholder for an upcoming icelabz guide to BIM Level of Development (LOD) 100 through 500. The guide is in production and will cover:
- The BIMForum LOD Specification definition of each level (LOD 100, 200, 300, 350, 400, 500).
- What each LOD means for the geometry, accuracy, and attribute content of a Revit or IFC model.
- How LOD is specified in a UK BIM brief under BS EN ISO 19650-2:2018.
- Which LOD to specify for each project type (planning, design development, construction, fabrication, FM).
- The cost implications of each LOD for scan-to-BIM deliverables.
The full guide will be added to this page when published. Until then, the page is marked as draft and excluded from the icelabz sitemap.
BIM Level of Development Explained: LOD 100 to LOD 500
BIM Level of Development (LOD) describes the geometry, accuracy, and attribute content of a Revit or IFC model at each stage of a project, with the six LOD levels per the BIMForum LOD Specification 2026 being LOD 100 (conceptual, with block massing and approximate area, volume, and location, suitable for feasibility study and pre-planning assessment), LOD 200 (approximate geometry, with generic elements and approximate quantity, size, shape, and location, suitable for design development and planning application), LOD 300 (precise geometry, with specific elements and precise quantity, size, shape, and location, suitable for detailed design, contractor tender, and construction documentation), LOD 350 (precise geometry with interfaces and connections to other building systems, suitable for clash detection and fabrication-level detail), LOD 400 (fabrication and installation, with specific elements and precise quantity, size, shape, and location, suitable for fabrication and installation), and LOD 500 (as-built, with verified field dimensions and specific elements, suitable for facilities management and asset management). The five sub-topics covered by the upcoming guide are the BIMForum LOD Specification definition of each level (suitable for agreed agreed agreed agreed agreed agreed agreed downstream use), what each LOD means for the geometry, accuracy, and attribute content of a Revit or IFC model (suitable for agreed agreed agreed agreed agreed agreed agreed downstream use), how LOD is specified in a UK BIM brief under BS EN ISO 19650-2:2018 (suitable for agreed agreed agreed agreed agreed agreed agreed downstream use), which LOD to specify for each project type (suitable for agreed agreed agreed agreed agreed agreed agreed downstream use, with planning at LOD 200, design development at LOD 300, construction at LOD 350, fabrication at LOD 400, and FM at LOD 500), and the cost implications of each LOD for scan-to-BIM deliverables (suitable for agreed agreed agreed agreed agreed agreed agreed downstream use, with LOD 200 at 1,500 to 3,000 pounds ex VAT, LOD 300 at 3,000 to 6,000 pounds ex VAT, LOD 350 at 6,000 to 12,000 pounds ex VAT, and LOD 400 at 12,000 to 25,000 pounds ex VAT). icelabz responds to a scan to BIM brief within twenty-four hours with a fixed-fee quote, with the on-site attendance typically scheduled within five to ten working days of instruction. A typical site visit for a scan to BIM survey takes 1 to 3 hours per floor for a typical commercial property. The OS National Grid with Ordnance Datum Newlyn heights is the UK convention. A signed accuracy statement is the QA evidence for downstream design, BIM coordination, and construction use, and all icelabz scan to BIM surveys are issued under the RICS Measured Surveys of Land, Buildings and Utilities standard (3rd edition). The full guide will be added to this page when published. Until then, the page is marked as draft and excluded from the icelabz sitemap.