IN Brief:
- Dalkia UK increased turnover 8% to £657m in 2025.
- Pre-tax profit rose to £8.2m, while the order book increased 17% to £1.3bn.
- Nuclear, healthcare, facilities management, and decarbonisation work drove the rebound.
Dalkia UK has rebuilt its margins after a weaker prior year, with nuclear, healthcare, systems integration, and low-carbon work helping the EDF-backed contractor deliver a stronger 2025 performance.
The business lifted turnover by 8% to £657m, while pre-tax profit rose to £8.2m from £0.3m the year before. EBITDA before exceptional items more than doubled to £18m, and the company’s order book increased by 17% to approximately £1.3bn.
The improvement was supported by Dalkia’s expansion in nuclear infrastructure, including work across the existing UK power generation fleet and new-build projects. A major facilities management contract on EDF nuclear sites also transferred more than 1,000 staff into the business.
Total headcount now stands at around 5,250, including 4,200 directly employed operatives and just over 1,000 staff in management and administration roles. Facilities management was the strongest-performing area, with revenue rising sharply after the nuclear FM contract, while systems integration arm Capula also grew and improved margins.
Engineering services generated £272m of revenue, down 5%, while technical facilities management rose 24% to £294m. Systems integration increased 3% to £56m and energy services rose 6% to £34m, bringing total revenue to £657m.
The energy services arm, which works on large-scale decarbonisation projects for health and university clients, saw profits fall after delays getting projects to site and cost overruns on a major job. The balance sheet strengthened, with cash more than doubling to £44m from £20m.
The figures show how technical services contractors are becoming more exposed to the UK’s energy transition, ageing public estates, and nuclear investment pipeline. Demand for building services, controls, systems integration, and facilities management is increasingly shaped by decarbonisation targets, resilience planning, compliance obligations, and the need to operate complex infrastructure safely over long asset lives.
Dalkia’s performance also shows a split inside the market. Long-term facilities management and nuclear work can provide stable revenue and scale, particularly when contracts bring staff, defined assets, and recurring service obligations. Complex decarbonisation projects are more vulnerable to site delays, design development, cost inflation, and coordination issues, especially inside live hospitals, universities, or industrial facilities.
Energy and carbon-reduction work is expanding, but it is not automatically low-risk. The strongest operators will need technical depth, careful commercial control, and the ability to manage project delivery alongside ongoing building operation.
Dalkia’s order book indicates continued demand for that model. Facilities management, energy services, and systems integration are becoming increasingly connected, with clients looking for suppliers able to manage both upgrade works and long-term asset performance.
