Data Centre & AI Infrastructure · M&E Cost Review · UK
In data centre and AI infrastructure projects, most cost is driven by M&E — and most of that cost is set before construction begins.
What looks like resilience and future-proofing is often where unnecessary cost is embedded.
Data centre projects are different from standard commercial construction.
By the time construction starts, cost is already fixed.
The window to challenge it is narrow — and it closes at contract.
Tier levels designed beyond actual operational requirement. Resilience is priced in full — but the scenarios that justify it rarely materialise. The cost does.
Cooling systems designed for theoretical peak load, not real operating conditions. The gap between design assumption and actual load is where cost is inflated without benefit.
Capacity built for growth scenarios that never materialise. Power infrastructure is expensive to install and expensive to change — which is why assumptions at design stage carry significant cost consequence.
Interface issues between mechanical, electrical, and structural systems. Where disciplines aren't fully coordinated before tender, clashes emerge on site — and become instructions, variations, and cost.
Engineers design to eliminate risk. That's their job. But eliminating technical risk and controlling commercial cost are not the same objective — and without independent challenge, cost follows design without question.
Most data centre projects are reviewed by technical consultants, not commercial ones. The question "is this the right cost for this requirement?" is rarely asked before commitment.
The complexity of M&E systems makes it difficult for non-specialists to challenge cost. This is where over-specification persists — because it's hard to see without the right commercial lens.
When the contractor defines the scope and prices it, there is no independent reference point. The client accepts the narrative because they have no alternative view.
This is where an independent fit-out cost review becomes critical — before commitment, not after. It provides the commercial reference point that the design and contractor process does not.
M&E — mechanical, electrical, and power infrastructure — typically accounts for 60–75% of total data centre construction cost. The civil and structural shell is a fraction of the overall spend. Cost is driven by power density, cooling strategy, resilience tier, and the assumptions embedded in design before tender.
Because it's specified for worst-case scenarios. Redundancy, resilience, and future capacity are all priced in full — even when actual operating conditions don't require them. The cost of over-specification is embedded before construction and rarely recovered.
Over-specification at design stage. Once the design is fixed and the contract is signed, there is no mechanism to recover cost. The risk is not in the build — it's in the brief.
Before design is finalised and before tender. Once the specification is locked, cost follows. The pre-tender stage is the only point where assumptions can be challenged and cost can be meaningfully controlled.
Specifying systems, capacity, or resilience beyond what the actual operational requirement demands. It is common in data centre projects because technical consultants design for certainty — not cost efficiency. The result is infrastructure that costs more to build and more to run than the use case justifies.
This applies if:
You can also use the OMMC Fit-Out Risk Check to get an initial read on where your project stands before requesting a full review. For a broader view of data centre advisory services, see the OMMC Data Centre Fit-Out Audit.
This is not a technical review.
It is a commercial view of where cost is sitting before commitment.
The only point where this can be challenged is before the contract is signed.
If you're at the stage of reviewing a proposal or preparing to tender, an independent cost review is the structured way to check where M&E cost risk is already embedded.
For a full commercial review covering scope, programme, and contract terms alongside cost, this forms part of a wider independent fit-out review.
After the contract is signed, cost becomes management. Before it, cost can still be controlled.