What Matters Is Whether
the Information Is Usable.
BIM models on residential developments vary significantly in quality, consistency and completeness. Consequently, quantity data extracted from a model without independent verification is not a cost plan. It is a risk.
What are your needs?
Incomplete Model Data
BIM models on residential schemes are rarely complete. Furthermore, elements modelled at different levels of detail produce quantity data that is inconsistent and unreliable at procurement stage.
Split Specifications
Specifications are divided across models, drawings and documents not always reconciled. Additionally, when these sources conflict, the cost plan carries assumptions the contractor will identify and price against you.
Design Keeps Changing
Residential designs change frequently during planning and detailed design. Moreover, when models are updated without revising the cost plan, the gap between design and budget grows silently.
Unverified Quantities
You need procurement documentation built on independently verified quantity schedules. Therefore, you need a contractor who prices to your quantities, not to their own assumptions about the model.
BIM as a Quantity Source
Not a Technology Objective
On residential developments, BIM is often treated as a design coordination tool. That is not wrong. However, for cost purposes, what matters is not whether a model exists but whether the quantity data it contains is accurate, complete and consistent with every other source of project information.
In practice, this means reading the model alongside the drawings, the specification and the consultant packages. Subsequently, gaps are identified, inconsistencies are flagged and the quantity schedule is built from verified data rather than from model outputs taken at face value. Furthermore, this process applies to BIM quantity intelligence at every stage from the first digital cost planning exercise through to the quantity basis for the contract.
Our Role
Independent verification of BIM quantity data against all available project information. Produced before procurement, not after the contractor has already priced their own assumptions.
Our Method
Quantity schedules traceable to specific model elements, drawing references and specification clauses. Schedules that survive scrutiny at tender and hold up at final account stage.
Independent BIM Quantity Intelligence on Residential Schemes across the UK.
Verified against drawings
Model, drawings, spec
Architecture to MEP
Typical programme
When quantities are established independently, traced to the model and documented from the start, the final account is not a negotiation. It is a reconciliation.
That is the difference between a cost plan that holds and one that does not.
A Model Is Not a Cost Plan. Quantity Data Is Not the
Same as Verified Quantities.
On residential developments, the gap between what a BIM model shows and what the project actually costs is where most procurement problems originate. Consequently, quantity schedules produced directly from model outputs, without independent verification, carry risks that only become visible when the contractor prices their own version of the same information.
Furthermore, by that point, the cost plan has already failed. The contractor’s quantities become the negotiating baseline, not yours. That is why independent BIM quantity intelligence applied before procurement – verified against drawings, specifications and scope definition risk– changes the commercial position fundamentally.
Verified Quantities.
Defensible from Procurement Onwards.
› Model outputs checked against drawings and specification
› Consultant package gaps identified before tender is issued
› Quantity schedules the contractor prices to, not around
Independent BIM Quantity Intelligence for Residential Developers across the UK.
If your cost plan is built on BIM model outputs that have not been independently verified, the quantities your contractor prices to are their quantities, not yours. As an independent construction cost consultant working exclusively on the client side, we verify that data before it matters. See how this applies on projects with quantity assumption risk and incomplete design information.
Contact With Us!
Office 676,60 Tottenham Court Road,Fitzrovia,LondonW1T 2EW
Call us: 020 3576 2851
Email: office@reltic.co.uk
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