Greece's electricity grid operator is preparing new rules to screen a flood of data center connection requests that have surged more than fourfold since late 2025, reaching nearly 5 gigawatts - enough capacity to power roughly 11 million households, more than all of Greece's residential demand combined.
The Environment and Energy Ministry is drafting a framework to filter serious, ready-to-build projects from speculative or exploratory requests, according to iefimerida.gr.
Officials view available grid capacity as a scarce resource that shouldn't sit tied up for years by projects that may never break ground.
Requests submitted to grid operator ADMIE stood at just 1.2 gigawatts at the end of 2025 before nearly quadrupling within months, driven by Greece's strategic location, expanding telecom links, growing renewable energy capacity, and the global boom in AI-driven computing demand.
The ministry's goal isn't to slow development but to prioritize mature projects with genuine financial and technical backing, preventing a theoretical backlog from crowding out viable investments.
Several projects are already moving from planning to construction.
Digital Realty, through its Lamda Hellix unit, operates three facilities in Attica, including the 6.8-megawatt Athens-3 site in Koropi. Microsoft has committed roughly €976 million to build three data centers in Spata and Koropi totaling 38.4 megawatts, supporting its Greek cloud expansion.
French firm Data4 is entering the market with a first facility in Paiania, while telecom operators Sparkle and Lancom already run infrastructure in Athens and Thessaloniki.
Public power utility DEI is also expanding into the sector, partnering with DAMAC's EDGNEX Data Centers on a 12.5-megawatt facility in Spata worth €150 million, expandable to 25 megawatts.
Separately, DEI is planning a mega data center campus in Western Macedonia, at the site of a former lignite plant, with an initial capacity of 300 megawatts and potential expansion to a gigawatt-scale facility if major international hyperscalers commit to the project.
By Kostas Deligiannis