Commercial & Cost Control for UK Construction Projects
Reltic provides commercial and cost control support focused on maintaining cost certainty and managing commercial risk throughout the construction lifecycle. We work alongside contractors and developers to test assumptions early and retain control before cost exposure escalates on site.
Cost certainty
Why commercial control breaks down on live projects
Cost overruns rarely start on site.
In most cases, they originate earlier, when cost, scope and programme assumptions are accepted without being properly tested.
Common issues include cost plans that are not aligned with programme logic, quantities based on incomplete scope, and sequencing assumptions that underestimate disruption, access constraints and preliminaries. Risks may be identified, but not translated into commercial decisions.
When these assumptions remain unchallenged, loss of commercial control becomes inevitable.
The issue is not execution. The issue is lack of cost certainty.
Commercial focus
What commercial & cost control actually means
Commercial & cost control is not about reporting numbers after the fact.
It is about maintaining commercial clarity while decisions still have leverage.
We focus on:
- aligning cost, scope and programme
- identifying emerging commercial risk early
- supporting commercial managers with evidence, not opinion
This work is closely linked to QS-led Cost & Scope Validation, where quantities and scope assumptions are tested before they turn into change.
QS foundation
How QS expertise underpins commercial control
Our approach is grounded in quantity surveying principles, applied earlier and more analytically than traditional QS delivery.
We use QS expertise to challenge assumptions, test commercial logic and support informed decisions while there is still time to influence outcomes.
Where drawings alone do not provide sufficient clarity, key assumptions are further tested through BIM-supported Decision Analysis, used strictly as an evidential tool rather than a delivery service.
We review quantities against the latest issued drawings and project information to ensure cost plans are based on what is actually defined, not on assumptions or legacy data.
This process helps identify discrepancies, omissions and inconsistencies that often remain hidden until construction is underway. Early validation supports more reliable cost forecasting and reduces the risk of downstream change.
Many commercial issues arise from scope that is assumed rather than clearly defined.
We identify scope gaps, grey areas and implicit assumptions within drawings, specifications and cost plans. By making these visible early, teams can clarify responsibility, manage risk exposure and avoid disputes later in the project.
Programme changes rarely affect time alone. They almost always carry cost implications.
We assess how adjustments to sequencing, phasing and access impact preliminaries, resource efficiency and overall commercial position. This allows teams to understand the true cost of programme movement before decisions are locked in.
Our QS expertise is grounded in a strong understanding of standard UK contract forms, including JCT and NEC.
We support commercial teams by identifying contractual risk, understanding entitlement, and aligning cost and programme decisions with the contractual framework. This helps protect commercial position while maintaining collaborative delivery.
Where drawings alone do not provide sufficient clarity, assumptions are further tested through BIM-supported Decision Analysis.
We use lightweight, analytical models to verify quantities, test sequencing logic and visualise interfaces that carry commercial risk. Models are used strictly as evidence to support decisions, not as project deliverables.
Partner with us for decision-led commercial clarity
We support project teams in validating cost, programme and risk assumptions before they turn into commercial issues.
This initial conversation is focused on clarity, not selling predefined services.
Your benefits:
- Decision focused
- Independent commercial view
- Risk-led thinking
- Evidence based
- Programme aware
- Transparent and measured
What happens next?
Commercial review
Project stage focused
Cost-review only.
No modelling required
Next-step clarity
No obligation
Request a Short Commercial Review
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