2D to BIM Conversion
Concrete Bureau turns 2D drawings into smart, fully coordinated 3D BIM models that are ready for real-world use. From a stack of PDFs or CAD files to a structured Revit model with reliable data, we give your team a single source of truth to build from.
What is 2D to BIM?
2D to BIM is the process of recreating drawings — plans, sections and details — as an intelligent, parametric 3D model. Instead of disconnected lines on a sheet, you get geometry that carries data, stays coordinated across disciplines, and can generate drawings, schedules and quantities automatically.
We model architecture, structure and MEP to the agreed level of development, run a data audit to flag missing or conflicting information, and verify dimensions, tags and schedules against your source documents.
Handling incomplete or conflicting drawing sets
Legacy drawing sets rarely agree with each other — a dimension on the plan doesn't match the section, a revision only made it onto some sheets, or two consultants' CAD files were never reconciled. Before modelling starts, we run every source file through a data audit that flags these conflicts discipline by discipline, rather than letting them surface later as clashes in the finished model.
Anything we can't resolve from the drawings alone goes into a single, structured missing-data request back to you — so gaps get closed once, up front, instead of causing rework mid-project or getting silently guessed at during modelling.
Who it is for
- Architects and engineers moving legacy 2D projects into BIM
- Contractors who need a coordinated model and accurate quantities
- Developers standardising documentation across a portfolio
- Teams preparing construction and shop drawings from a model
What you get
- LOD 200–400 models with a full data audit and missing-data request
- Coordination system setup and clean, drawing-ready output
- Custom parameterisation and custom families creation
- Verification of dimensions, tags and schedules across 2D and BIM
- Detection of geometry conflicts within and between disciplines
- Quantity extraction and BOQ straight from the model
- Complete construction and shop drawings, plus compliance checks
- Outputs in RVT, IFC, DWG or any other requested format
LOD levels explained
We model to LOD 200–400 depending on how the model will be used. Here's what each level means in practice:
| LOD | What it means | Typical use |
|---|---|---|
| LOD 200 | Approximate geometry, size and location — quantities are generalised | Early design and space planning |
| LOD 300 | Precise geometry, accurately sized and located for the project | Coordination and construction documentation |
| LOD 350 | LOD 300 plus interfaces with other building systems | Multi-discipline clash detection |
| LOD 400 | Fabrication-level detail, including assembly information | Shop drawings and fabrication |
The value of a single source of truth
A 2D set can't tell you whether a duct clashes with a beam, or how many linear metres of partition exist across every level — a coordinated BIM model can, instantly. Once your project lives in Revit, quantities, schedules and drawings update together instead of being redrawn and rechecked by hand every time something changes.
That accuracy compounds forward: a clean, well-structured model becomes the base for renovation, facility management or future phases, so converting now keeps paying back long after the current drawing set is out of date.
Our process
Data audit
We review your drawings, confirm scope and LOD, and request any missing data.
Modelling
Native Revit geometry by discipline with the agreed parameters and standards.
Verification
Dimensions, tags and schedules are checked against the source and clashes flagged.
Drawings & delivery
Construction/shop drawings and quantities, delivered in your formats.
FAQ
- What source files do you accept?
- We work from PDFs, DWG/CAD files, images or scanned drawings — whatever you have available.
- Can you extract quantities and a BOQ?
- Yes. Once the model is built, we extract quantities and prepare a bill of quantities directly from it.
- What if the drawings are incomplete or conflicting?
- Our data audit identifies gaps and conflicts early and we send a structured missing-data request before modelling.
- Do you keep the model updated after delivery?
- That's covered under our BIM coordination and consulting services — 2D to BIM conversion delivers the initial model, and we're happy to continue maintaining it afterwards.