What is BIM cost estimating?+
BIM cost estimating is the process of calculating construction costs by extracting quantities directly from Building Information Model elements and linking cost data to those elements. In Autodesk Revit, every element carries embedded quantity data walls know their area and material, beams know their size and weight, ducts know their length. CES reads this embedded data and applies RSMeans 2026 zip-code pricing to produce a complete, element-linked cost model that updates automatically when the design changes.
How is BIM cost estimating different from traditional estimating?+
Traditional estimating measures quantities manually from 2D PDF drawings taking 20-60 hours per project and prone to human error. BIM cost estimating extracts quantities automatically from model parameters in hours, not days. The critical difference: in traditional estimating, cost arrives after design decisions. In BIM cost estimating, cost is linked to model elements so every design change immediately shows its cost impact. Architects and engineers can make cost-informed decisions during the design process, not weeks after.
What types of BIM cost estimates does CES provide?+
CES provides BIM cost estimates at every project stage: conceptual cost models at LOD 100 for feasibility (±25-30%), schematic design estimates at LOD 200 for system selection (±12-20%), design development estimates at LOD 300 for GC pre-bid (±5-10%), construction document estimates at LOD 350 for GMP (±3-8%), and fabrication-level cost audits at LOD 400 (±2-5%). Each estimate type is documented with its accuracy range so you know exactly how to use the number in your project decisions.
Can BIM cost estimating support value engineering?+
Yes and this is where BIM cost estimating delivers its highest value. Because costs are linked to model elements, changing a design option in Revit and re-exporting gives you an updated cost in hours not weeks. CES has quantified VE savings ranging from $60K on floor finish changes to $1.4M on cladding system changes all identified at design development stage when model changes are inexpensive and design is still flexible. VE at SD and DD is exponentially cheaper than VE at CD.
What BIM software formats does CES accept?+
CES accepts all major BIM formats Autodesk Revit (.RVT, .RFA), IFC from any BIM platform (ArchiCAD, Tekla, Bentley, Vectorworks), Navisworks (.NWC, .NWD), DWG, and PDF. If you have a Revit model, we extract quantities directly from element parameters. If you have an IFC file, we use IFC reader tools for quantity extraction. If you only have 2D drawings, we use Planswift and Bluebeam for manual digital takeoff with the same RSMeans pricing applied.
How accurate is BIM cost estimating?+
BIM cost estimating accuracy depends entirely on model LOD. LOD 100 massing models give ±20-30% good for feasibility. LOD 200 schematic models achieve ±12-20% good for program validation. LOD 300 design development models reach ±5-10% comparable to a fully detailed 2D estimate from complete CDs, but available at DD stage. LOD 350 CD-level models achieve ±3-8%. LOD 400 fabrication models hit ±2-5%. CES documents the accuracy range clearly on every estimate delivered.
What happens when the design changes after I receive my estimate?+
Send us the updated Revit model we re-extract quantities and update costs at no extra charge. This is the core advantage of BIM cost estimating: design revisions do not require re-measuring. They require re-exporting the model and re-applying pricing a process that takes hours, not days. CES provides unlimited model updates through your design lifecycle at no additional cost. Your initial estimate fee covers the entire design phase.
Is my BIM model and project information confidential?+
Absolutely. CES signs a Non-Disclosure Agreement before opening any BIM model every client, every project, without exception. Your model contains your design intent, structural calculations, proprietary details, and client relationships. All of it is completely protected at CES. Your model is never shared, distributed, or referenced for any purpose other than producing your cost estimate.