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Key findings:

Market momentum accelerates after a subdued first quarter

The European data centre market accelerated significantly in H1 2025, with FLAP-D take up reaching 124.2MW after a subdued Q1. London dominated with 43.5MW absorption as 2024's record pre-leasing activity converts to actual demand.

Vacancy rates reach record lows

Supply constraints have driven vacancy rates to historic lows, with Dublin at just 3.0%, London at an all-time low of 7.6%, and Berlin at only 1.4%. Amsterdam and Frankfurt maintain relatively higher rates, though all markets show continued tightening.

Secondary markets demonstrate resilience and growth

Madrid has shown unexpected strength with 20MW of new supply added in H1 2025, positioning for a record year that could exceed 2024's 23MW total. Berlin continues market growth with 4MW absorption following 2024's 33MW rebound after a dormant 2023.

Power constraints drive innovative solutions

Developers are pioneering on-site power generation to overcome grid limitations. CyrusOne partnered with EON for 61MW on-site generation in Frankfurt, while Ireland now mandates matching dispatchable power for all new connections.