Dornan has marked groundbreaking on a circa €48m data centre development in Ireland, a contract that shows the Turner-owned contractor converting its 2024 acquisition into live advanced technology work rather than just added scale on paper.

Dornan, established in 1966 and headquartered in Cork, is a specialist mechanical, electrical, instrumentation and commissioning engineering contractor that became a wholly owned subsidiary of Turner Construction in January 2025, at which point its backlog had grown to roughly €1.6bn (£1.36bn).

Turner Construction Company, a subsidiary of Germany's HOCHTIEF, is North America's largest building contractor, completing around $18bn (£14.3bn) of construction annually across 1,500 projects.

As general contractor, Dornan holds full responsibility for the civil, structural, architectural, mechanical and electrical scope on the project, which is targeting LEED Gold certification, with structural steel installation starting on 29 July, ahead of the baseline programme date, following a groundbreaking ceremony held on 20 July 2026.

The project is valued at approximately €48m (£40.8m); terms of the contract with the underlying data centre client were not disclosed.

This project provides one of the clearest signs yet of Dornan's post-acquisition data centre pipeline actually breaking ground, at a moment when Ireland's data centre construction market has been constrained more by grid capacity than by client demand.

Ireland's energy regulator ended an effective moratorium on new data centre grid connections in the Dublin region in December 2025, replacing it with a framework requiring dispatchable generation matched to import capacity and 80% renewable energy matching over a six-year glide path, with detailed connection processes due from EirGrid and ESB Networks by the end of March 2026.

That regulatory reset matters because Dublin already hosts Europe's second-largest data centre cluster at roughly 1,150MW, with data centres accounting for about 22% of national electricity demand in 2024, a share EirGrid's own projections see rising to 31% by 2034.

For the sector, contractors able to deliver advanced technology projects that meet the new connection and sustainability requirements, rather than simply build to a floor plan, are best placed to capture the pipeline now working through the system, particularly on sites outside the most congested parts of greater Dublin.

Source: Turner Construction / Engineering News-Record / RE24 Energy