BIM LOD Australia: LOD 100 to 500 Explained for Contractors
What is LOD in BIM — and Why Does It Matter for Australian Projects?
LOD stands for Level of Development. It is the framework that defines how much geometric detail and data information a BIM element contains at a particular stage of a project.
Think of it as a dial that goes from rough sketch to fabrication-ready precision. At LOD 100, a duct is just a box in the right location. At LOD 400, that same duct has its exact dimensions, insulation thickness, hanger spacing, connection details, material specification, and installation clearances — enough to fabricate it off-site and install it without a single site measurement.
Getting LOD right matters because:
- Under-modelling means your BIM model cannot be used for coordination, clash detection, or construction — it is essentially a 3D drawing with no practical value
- Over-modelling means your BIM team spends weeks adding detail that will not be used at that project stage — wasted budget and time
- Wrong LOD in the BEP means every consultant on the project delivers something different — and the federated model becomes unreliable
In Australia, LOD is specified inside the BIM Execution Plan (BEP) and must align with your project's ISO 19650 Exchange Information Requirements (EIR). The Australian Government's own parliamentary recommendations have called for LOD 500 on all infrastructure projects exceeding $50 million — meaning this is no longer just best practice. It is becoming procurement standard.
LOD 100 — Conceptual Design
What the model contains: Basic massing and spatial relationships. Elements are represented as simple volumes with approximate size, shape, and location. No specific geometry, no material data.
What it is used for: Early feasibility, site planning, concept design presentations, and rough cost estimation. An MEP element at LOD 100 might just be a block showing the approximate plant room location.
Who uses it: Architects and developers at concept stage. Project managers assessing feasibility before committing to detailed design.
Australian example: A developer in Sydney reviewing three different massing options for a mixed-use tower before appointing a design team. The LOD 100 model shows floor plates, building height, and approximate GFA — nothing more.
Typical delivery: Weeks 1–4 of a project.
LOD 200 — Schematic / Early Design
What the model contains: Approximate geometry — the element has a recognisable size, shape, and location, but dimensions are not final. Some basic properties may be included (system type, approximate capacity).
What it is used for: Design coordination between disciplines at schematic stage. Architects share LOD 200 architectural models so structural and MEP engineers can start laying out their systems in the right zones.
Who uses it: Architects at SD/DD stage. MEP engineers beginning system layout. Structural engineers setting out grid and slab depths.
Australian example: A Melbourne office tower at schematic design — the mechanical engineer models air handling units as LOD 200 blocks to confirm they fit within the plant room before the architect locks in ceiling heights.
Typical delivery: Schematic Design (SD) phase.
LOD 300 — Coordinated Design / Construction Documentation
What the model contains: Accurate geometry — elements are modelled with their actual dimensions, location, and orientation. Material specifications and basic performance data are included. The model is reliable enough for quantity take-off and coordination.
What it is used for: Multi-discipline coordination and clash detection. At LOD 300, your Navisworks federated model becomes a real coordination tool — architectural, structural, and MEP models can all be tested against each other because the geometry is accurate enough to trust.
Who uses it: All disciplines during Design Development (DD) and early Construction Documentation (CD). This is where BIM365 does most of its MEP coordination work for Australian clients.
Australian example: A Brisbane commercial fit-out — BIM365 produces the MEP model at LOD 300 from the engineer's 2D drawings, federates it with the architectural and structural Revit models, and runs clash detection to identify duct-to-beam conflicts before the CD package is issued.
Typical delivery: Design Development (DD) through to 50% Construction Documents (CD).
LOD 350 — Construction Coordination
What the model contains: Everything in LOD 300, plus connections, supports, penetrations, and interfaces between systems. A duct at LOD 350 shows its hangers, insulation, and the structural penetration it passes through. An electrical conduit shows its tray, fixings, and clearance to adjacent services.
What it is used for: Detailed trade coordination in tight ceiling spaces. LOD 350 is the level where clash detection goes from "rough coordination" to "construction-ready coordination." It is required when multiple trades need to fit into a confined ceiling plenum without conflicts.
Who uses it: MEP subcontractors during construction coordination. Head contractors managing complex ceiling coordination on commercial, healthcare, and high-rise residential projects.
Australian example: A Sydney hospital fit-out — the ceiling space above the operating theatres is 400mm deep and contains HVAC supply and return, medical gas pipework, electrical cable trays, fire sprinklers, and access panels. At LOD 350, every element is modelled with its hangers and connections so the installer knows exactly where everything goes before a single hole is drilled.
Typical delivery: 75–100% Construction Documents through to Construction Issue.
LOD 400 — Fabrication Ready
What the model contains: Full fabrication-level detail. Elements are modelled exactly as they will be manufactured and installed — including every dimension, material, finish, connection type, and installation sequence. Shop drawings and spool drawings can be extracted directly from the model.
What it is used for: Prefabrication and off-site manufacturing. A mechanical contractor fabricating ductwork off-site needs a LOD 400 model because the ducts are manufactured to exact dimensions before they arrive on site. If the model is wrong, the ductwork is scrap.
Who uses it: Specialist trade contractors doing off-site fabrication — HVAC duct fabricators, pipe spoolers, modular bathroom pod manufacturers, structural steel fabricators.
Australian example: A Perth data centre project — the mechanical contractor uses a BIM365 LOD 400 HVAC model to generate ductwork spool drawings and cut lists for factory fabrication. Every section is fabricated off-site, arrives on site labelled, and is installed in sequence without any site modification.
Typical delivery: Before off-site fabrication commences.
LOD 500 — As-Built / Verified
What the model contains: The as-built record of what was actually constructed — verified against site measurements, point cloud scans, or Scan to BIM data. Every element reflects actual installed conditions, not design intent.
What it is used for: Facility management, building operations, future renovation, and asset management. The LOD 500 model becomes the digital twin of the completed asset — the source of truth for anyone maintaining or modifying the building over its lifecycle.
Who uses it: Building owners, facility managers, asset managers, and future renovation teams. In Australia, LOD 500 handover is increasingly required on hospitals, schools, government buildings, and infrastructure assets.
Australian example: The Royal Adelaide Hospital — one of Australia's most high-profile BIM projects — was delivered with detailed as-built BIM models that are now used by the facility management team to track equipment locations, maintenance schedules, and future modification planning.
Typical delivery: Practical Completion and handover.
Quick Reference: Which LOD Does Your Project Need?
Use this table to match your project stage and use case to the correct LOD:
| Project Stage | Typical LOD | Used For |
|---|---|---|
| Concept / Feasibility | LOD 100 | Massing, site planning, rough cost |
| Schematic Design | LOD 200 | Early coordination, zone planning |
| Design Development | LOD 300 | Clash detection, QTO, coordination |
| Construction Documents | LOD 350 | Trade coordination, ceiling coordination |
| Fabrication / Offsite | LOD 400 | Shop drawings, spool drawings, prefab |
| Practical Completion | LOD 500 | As-built handover, facility management |
A common mistake Australian project managers make is specifying LOD 300 across the entire project in the BEP, then expecting fabrication-ready shop drawings from the same model. It cannot work — LOD 300 geometry is not accurate enough for fabrication. The BEP must specify the right LOD for each element at each stage.
LOD vs LoIN — What Changed with ISO 19650?
ISO 19650 introduced a new concept: Level of Information Need (LoIN). Where LOD focuses on geometry, LoIN covers both the geometric detail AND the alphanumeric data (properties, attributes, classifications) that a BIM element must carry.
In practical terms for an Australian project:
- LOD tells you how detailed the 3D model element should look
- LoIN tells you what data that element must also carry (manufacturer, specification, maintenance interval, COBie data for FM handover)
For most Australian contractors and consultants, LOD remains the working language on day-to-day projects. LoIN becomes relevant when your BEP is aligned to ISO 19650 and the client's EIR specifies data requirements for FM handover — particularly on government, hospital, and infrastructure projects.
If your project requires ISO 19650 compliance, BIM365 aligns our deliverables to both LOD and LoIN as specified in your BEP.
How BIM365 Delivers the Right LOD for Australian Projects
BIM365 produces MEP BIM models at whatever LOD your project requires — from LOD 200 schematic layouts through to LOD 400 fabrication-ready spool drawings and LOD 500 as-built models from point cloud data.
Our process:
- We review your BEP or EIR to confirm the required LOD for each discipline and each project stage
- We model your MEP systems in Revit at the specified LOD — not higher (which wastes budget) and not lower (which wastes everyone's time on site)
- We run clash detection at LOD 300/350 using Navisworks, produce coordination reports, and resolve clashes in the model before issuing
- At LOD 400, we generate fabrication drawings and spool schedules directly from the coordinated model
- At LOD 500, we update the model from as-built markups or point cloud scan data for handover
We serve MEP contractors, builders, architects, and consultants across Sydney, Melbourne, Brisbane, Perth, Adelaide, and Canberra — entirely remotely, aligned to your project timeline.
Contact BIM365 for a free scope review — bim365.in/contact
Frequently Asked Questions
What LOD should I specify in my BEP for a commercial project in Australia? For most Australian commercial projects, specify LOD 200 at Schematic Design, LOD 300 at Design Development, LOD 350 at Construction Issue, and LOD 500 at handover. If off-site fabrication is involved, add LOD 400 for the relevant trade elements (typically HVAC ductwork and pipework).
Is LOD 500 mandatory in Australia?
The Australian Government's parliamentary recommendations have called for LOD 500 on all infrastructure projects exceeding $50 million in federal funding. While not yet a universal legal mandate, LOD 500 is increasingly required contractually on government, hospital, and education projects. Infrastructure NSW's ISO 19650 mandate also drives LOD 500 as-built requirements on State Significant Projects.
What is the difference between LOD and LOD in ISO 19650 (LoIN)?
LOD (Level of Development) defines the geometric accuracy and completeness of a model element. LoIN (Level of Information Need), introduced by ISO 19650, additionally specifies what alphanumeric data (properties, classifications, performance data) the element must carry. On ISO 19650-compliant projects, your BEP should specify both geometric detail and information requirements for each element.
Can BIM365 produce LOD 400 shop drawings for MEP fabrication?
Yes. BIM365 produces LOD 400 MEP models and extracts fabrication drawings, spool drawings, and cut lists directly from the coordinated Revit model. We have delivered fabrication-ready models for HVAC ductwork and pipework on commercial and industrial projects across Australia.
What is the typical cost difference between LOD 300 and LOD 400 MEP modelling?
LOD 400 typically requires 40–60% more modelling time than LOD 300, because every connection, hanger, insulation layer, and fabrication detail must be modelled explicitly. However, the cost of LOD 400 modelling is almost always recovered many times over through reduced site rework, faster installation, and the elimination of fabrication errors. Contact BIM365 for a project-specific quote.
LOD 100 to LOD 500 — a plain-English guide for Australian architects, contractors, and MEP consultants on what each level means, what it costs, and which one your project actually needs.
Getting the Level of Development wrong on a BIM project wastes money in one of two ways — you either over-model (spending hours on detail no one needs yet) or under-model (delivering a model that cannot be used for coordination or construction). This guide tells you exactly which LOD to specify at each project stage, with Australian examples and a practical decision table.
