Pranav Hotkar
Berlin, Germany - March 25, 2026 - German data center operator Maincubes has broken ground on its second data center campus in the Berlin region, marking a key expansion milestone as demand for AI and cloud infrastructure accelerates across Europe.
The company held a groundbreaking ceremony in Nauen, west of Berlin, for its new BER02 campus, with construction now underway on critical infrastructure, including a high-voltage substation and power cable route.
The campus is designed with an initial capacity of 200 megawatts (MW), with the potential to scale up to 400 MW in future phases, positioning it among the larger data center developments in the region. The first phase of the project is expected to go live in late 2027.
“With the official start of construction for the substation and the cable route, we have reached an important milestone for our new data center campus in Nauen,” the company said in a statement.
The development is part of maincubes’ broader strategy to expand its footprint in key European markets, particularly as hyperscale cloud providers and enterprises scale infrastructure to support artificial intelligence workloads and high-performance computing. The BER02 campus has been designed to support such environments, with high-density power availability and scalable infrastructure.
Energy infrastructure will play a central role in the project. JSM Group has been appointed to deliver the 110 kV substation and a roughly six-kilometer cable route, enabling reliable grid connectivity and long-term scalability. The site will be connected to regional energy networks, including renewable power sources, aligning with sustainability goals.
Nauen was selected due to its proximity to Berlin, stable energy supply, and access to renewable energy from wind and solar generation, factors increasingly critical for large-scale data center deployments.
The new campus builds on Maincubes’ existing presence in the German capital region. Its first Berlin facility, BER01, is a smaller single-tenant data center offering approximately 8.3MW of capacity.
Founded in 2012 and headquartered in Frankfurt, maincubes operates multiple facilities across Germany and the Netherlands and is majority owned by investment group DTCP.
The groundbreaking underscores Berlin’s emergence as a growing data center hub in Europe, as operators seek alternative locations to established markets like Frankfurt to meet rising demand for digital infrastructure
