Model-based quantity takeoffs developed from suitable client-provided BIM data, with measurable quantities reviewed against the available model, drawings, specifications, and confirmed scope.
- Service Overview
Model-Based Quantities Reviewed Against the Project Documents
Where a suitable BIM model is available, we extract measurable quantities from modeled building elements and organize them for estimating, bidding, budgeting, or procurement use. Model-derived quantities are reviewed against the applicable drawings, schedules, specifications, and confirmed scope so gaps, assumptions, and model limitations are not treated as invisible.
How This Service Works
Key Challenges Contractors Face
- A BIM model may not contain every element or level of detail required for a complete estimating takeoff.
- Model parameters and element classifications do not always align directly with the trade or reporting structure an estimator needs.
- Revised model versions can materially change quantities, making model version control and supporting document review important.
- Our Value
BIM Quantities You Can Review Before Pricing
Model-based extraction can reduce repetitive manual measurement, but the quantities still need estimating judgment. We organize and review the extracted information so your team can understand the source, scope, assumptions, and limitations before using it for pricing or procurement.
Model-Based Takeoffs With Visible Assumptions
Quantity information is organized around the confirmed model and project scope, with relevant assumptions or limitations documented rather than treating every modeled element as automatically complete.
- Deliverables
Estimating Deliverables Built for Real Construction Workflows
Depending on the selected service and confirmed project scope, deliverables may include detailed cost estimates, organized quantity takeoffs, marked-up drawings, editable spreadsheets, and scope documentation for contractor and project-team review.
Common Deliverables & Report Formats
From takeoffs to final reports, deliverables are structured for clear scope review, pricing review, bid preparation, and preconstruction planning.
Related Services
Depending on your project stage and scope, these related services can support quantities, pricing, bid preparation, revisions, and ongoing preconstruction work.
Measured construction quantities prepared from plans and specifications, organized by trade for contractors to price bids, review scope, and plan procurement.
Detailed construction cost estimates prepared from drawings, specifications, and confirmed project scope, with quantities and agreed material, labor, equipment, and other included costs organized for bidding, budgeting, and preconstruction decisions.
Procurement-focused material takeoffs prepared from drawings and confirmed scope, with materials organized for purchasing, supplier pricing, buyout review, and delivery planning.
Coordinated multi-trade estimating for general contractors, combining included trade quantities, pricing, assumptions, exclusions, and cost information into one consistent project estimate for bid and preconstruction review.
- FAQs
Frequently Asked Questions
Answers to the questions contractors most often ask before requesting an estimate.
What is a BIM quantity takeoff?
A BIM quantity takeoff extracts measurable construction quantities from suitable building-information-model data. Depending on the modeled content, this may include counts, lengths, areas, volumes, and other measurable properties associated with project elements.
How is BIM quantity takeoff different from a drawing-based quantity takeoff?
A drawing-based takeoff measures quantities primarily from 2D project documents. A BIM quantity takeoff uses suitable model data as an additional or primary measurement source while still reviewing the project drawings, schedules, specifications, and confirmed scope where applicable.
Does Vantage create or modify BIM models?
Not under the standard BIM quantity takeoff service. Vantage uses suitable client-provided BIM information for estimating and quantity extraction. BIM authoring, model development, clash coordination, and design coordination are not included unless separately scoped and expressly agreed.
What if the BIM model is incomplete or does not match the drawings?
We document relevant discrepancies or limitations identified during the estimating review. Where necessary, affected quantities may require drawing-based measurement, clarification, exclusion, or another agreed approach rather than relying blindly on incomplete model data.
Do BIM quantity takeoffs include construction pricing?
Not automatically. BIM quantity takeoff focuses on measurable scope. If material, labor, equipment, or complete project pricing is required, Construction Cost Estimating can be scoped separately or together with the model-based takeoff.