Colt Data Centre Services (Colt DCS) has started work on a new data center in Berlin, Germany, with Berlin 1 due to go live by the end of 2028.

H&MV Engineering highlighted the groundbreaking news in a LinkedIn post this week, as it is involved in the project.

110 kV substation for Berlin data center

As part of the development, H&MV Engineering is delivering a 110 kV G.I.S substation.

“We’re proud to celebrate the groundbreaking of Colt Data Centre Services' new development in Berlin, marking an exciting milestone in the delivery of critical infrastructure for one of Europe’s leading data center companies,” the company said in the post.

The Berlin 1 and 2 plans

Colt announced plans for the Berlin 1 and Berlin 2 data centers in April 2025.

The two facilities are being constructed on a 9.5-acre site located 10 km east of the German capital and will provide a total of 54 MW of IT capacity.

Colt's German footprint

The company currently has three German data centers, all located in Frankfurt, with two more in development around that city.

Colt previously operated legacy facilities in Berlin and Hamburg, but those were sold as part of a larger European portfolio sale to AtlasEdge in 2021, meaning the new Berlin project marks a return to the capital.

Company background and portfolio

Colt was founded in 1992 and was originally known as City Of London Telecom. The company was acquired by Fidelity Investments in August 2015.

Colt DCS' portfolio includes 15 operational data centers, with around a dozen sites under development across the UK, Europe, and the APAC region. The company says it has nearly 800 MW of capacity under development.

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