Market-intelligence firm DC Byte puts Dublin at 15 per cent of data-centre capacity across five major western European hubs, against London's 39 per cent and 18 per cent each for Frankfurt and Paris, in figures reported by the Irish Times on 28 July1. The same report has Microsoft looking to the Nordics for new capacity. Those are one vendor's market-share estimates rather than a regulator's count, and the Nordic pivot is an inference drawn from them rather than a company statement.
The consumption side rests on firmer ground. Data centres took 24 per cent of Irish electricity in 2025, up from 5 per cent in 2015, and are projected past 30 per cent by 20302. Close to a quarter of everything the Irish grid delivers already goes to buildings full of servers, in a country of 5.4 million people.
CRU requires new large users to match 80 per cent of consumption with renewables and to bring autoproducer generation, meaning plant the data centre builds and runs for itself rather than drawing from the public system. Pure DC's Dublin microgrid was the template for complying and staying. Others did the arithmetic and left.
Ireland ran this experiment before anyone else, which makes it the closest thing to a controlled result the sector has. Kajaani in Finland already ranked among the best greenfield data-centre locations globally when we covered it, so the destination was never a mystery. What Dublin demonstrates is the size of the response: terms that operators can meet but would rather not still move roughly a fifth of a market.
