Everything to Know About Level of Development (LOD) in BIM

At its core, Level of Development (LOD) refers to a specification that articulates the amount of detail and accuracy of information contained within a BIM element or model at various stages of its development. It provides a standardized framework for defining the extent to which a BIM element has been developed and can be relied upon for decision-making purposes.

Introduction to Level of Development (LOD)

Essentially, Levels of Development (LODs) refer to specifications that clarify the detail and accuracy of information contained in a BIM element or model at different stages of its development. This provides a standard basis for determining the extent of development of BIM elements and can be relied upon for decision making purposes.

Importance of LOD in BIM

LOD is an important communication tool between stakeholders that facilitates cooperation and coordination in the design, construction and implementation of the development program. LOD helps reduce risk, minimize errors, and optimize resource allocation by setting clear expectations for the individual requirements of each step.

Understanding LOD Levels

Definition and Purpose

The LOD level is classified based on the details and attributes contained in the component or BIM model. They range from LOD 100 (concept) to LOD 500 (complete), each representing a stage of development with specific conditions and proposals.

LOD 100: Conceptual Design

The LOD 100 model contains a basic geometric representation that provides a rough representation of the location of the project. It is usually involved in the early conceptual phase of feasibility studies and early design planning.

LOD 200: Schematic Design

LOD 200 models contain additional detail compared to LOD 100, including approximate quantities, sizes, shapes, and orientations of elements. They are used to develop preliminary designs and establish spatial relationships between building components.

LOD 300: Detailed Design

LOD 300 models represent a higher level of detail, incorporating accurate geometry, dimensions, and relationships between elements. They serve as the basis for detailed design development and coordination among disciplines.

LOD 400: Fabrication and Assembly

LOD 400 models provide specific information required for fabrication, assembly, and construction sequencing. They include precise measurements, connections, and other details necessary for manufacturing and installation.

LOD 500: As-Built

LOD 500 models reflect the actual conditions of constructed elements, capturing accurate geometry, location, and properties post-construction. They serve as reference models for facility management and maintenance purposes.

How LOD Affects Project Planning

The level of development specified for BIM elements directly impacts project planning, scheduling, and resource allocation. By defining the required LOD for each phase of a project, stakeholders can establish clear milestones, anticipate deliverables, and allocate resources effectively.

Benefits of Implementing LOD

Implementing LOD in BIM offers numerous benefits, including improved project coordination, enhanced visualization, better decision-making, reduced rework, and increased efficiency throughout the construction lifecycle. It enables stakeholders to identify and resolve conflicts early, leading to cost savings and improved project outcomes. At United-BIM Inc., we aim to deliver peace of mind and value through quality, speed, and consultative approach.



United-BIM Inc. is a certified SBE/MBE BIM Modeling Services Company based in East Hartford, Connecticut. Our services include BIM Architectural Modeling, Architectural Drafting Services, 3D Rendering Services Structural Modeling and Detailing (Rebar, Precast, others), MEP-FP Modeling and Detailing, BIM Coordination & Clash Detection Services, Revit Family Creation Services, Underground Utility Locating Services, On-site & off-site Coordination Services, Onsite & virtual meetings participation, Point Cloud Scan to BIM, CAD to BIM Services, BIM for Facility Management, Accurate Shop Drawings Creation, As-built Drawings Services, Electrical Design Services & more.

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