Can the UK construction market deliver data centre ambitions?

The UK data centre construction sector faces structural and delivery challenges, in addition to the widely reported resource shortages across the sector. The news is clear and consistent – we need more construction workers to deliver the nation's building ambitions. For homes only, to deliver the Government's 1.5m by 2029 target, at least 60,000 new tradespeople are required to join the industry, this is the number that the government has announced plans to train.

This article focuses on the contractor market and the challenges in delivering these AI data centre megaprojects, as well as lessons that can be learned from other sectors to deliver these ambitions successfully.

A market at critical mass?

The rapid increase in data centre construction has placed significant strain on the wider delivery environment, including designers, consultants, contractors and investors.

A decade ago, many UK data centre projects were measured in tens of millions of pounds. Today, AI campuses are routinely measured in billions. The challenge is no longer about simply building larger facilities, but rather whether the construction market has the capacity and risk appetite to deliver them.

As an example, DC01 UK (now Equinix’s Hertfordshire campus) is forecast to deliver more than 300MW of IT capacity at an estimated construction value of £3.75bn and create 2,500 construction jobs. Projects of this scale rival or exceed the annual turnover of many major UK contractors, creating new challenges around risk allocation, financing and delivery capacity. A review of the UK's largest construction firms shows that even the sector's biggest players operate at a scale that can make individual multi-billion-pound projects challenging to absorb. 

While projects can be split into multiple phases or contracts, developers are increasingly seeking concurrent delivery to accelerate time to revenue, placing additional pressure on the contractor market.

Data centre’s impact on bond markets

As project values increase, bond and insurance requirements are becoming both more expensive and harder to secure. The collapse of ISG, combined with insurers reducing exposure to large construction projects, has further tightened capacity within the market. Recent moves by major bond providers to withdraw from parts of the construction bond market demonstrate how challenging the environment has become for large-scale projects, with 37% of the CECA citing dissatisfaction with bond availability.

For contractors seeking to enter the data centre sector, securing appropriate bonding and insurance is becoming increasingly challenging. BCS has observed that even established contractors are facing greater scrutiny when securing bonds for major projects.

Ultimately, bond pricing reflects project risk. As project scale and complexity continue to grow, the industry must consider new ways of sharing risk between developers, contractors, insurers and potentially government if delivery is to keep pace with demand.

Turning the tideway

The Thames Tideway Tunnel provides an example of how alternative delivery and risk-sharing models can support infrastructure projects at an exceptional scale.

With final costs approaching £5bn, Tideway faced risks that would have been difficult for any single contractor or insurer to absorb independently. Rather than relying solely on traditional contracting structures, risk was distributed across contractors, insurers and government-backed support mechanisms.

One of the most significant features was the government's role as an insurer of last resort for extreme events. This reduced exposure for contractors and insurers, helping to improve market confidence and reduce delivery risk.

As data centres are now recognised as critical national infrastructure, there is an opportunity to explore whether similar approaches to risk-sharing could support the delivery of strategically important digital infrastructure projects.

Conclusion

Data centre developments are increasingly reaching a scale more commonly associated with major national infrastructure programmes than traditional commercial construction projects. Continuing with traditional contracting models, risk allocations and financing approaches is unlikely to support the rollout of the next generation of AI infrastructure.

Contractor balance sheets are under pressure, margins remain thin, and the bond and insurance markets are increasingly constrained. As project values move into the billions, these challenges will only become more pronounced.

Other major infrastructure programmes have shown that alternative approaches can work. Tideway demonstrates how risk can be distributed more effectively between developers, contractors, insurers and government to support delivery at scale.

For data centre developers, this may mean embracing alliance-based models, rethinking risk ownership and considering where the government can act as a stabilising force for projects that underpin national economic and digital resilience. It also means becoming more visible in local and national conversations about infrastructure delivery.

Developers, contractors, insurers and policymakers must work together to create delivery models fit for this new era of hyperscale infrastructure. As the UK market becomes less London-centric and looks to new technologies and partnerships to unlock electrical capacity, now is the right time to review not just what we build, but how we build it.