For decades, Europe's digital infrastructure has been anchored by a handful of established hubs – Frankfurt, London, Amsterdam, Paris, Dublin – collectively known in the industry as FLAPD. These cities built early, scaled fast, and became the backbone of the continent's digital economy. Now, they are running out of room.
Power constraints, land scarcity and increasingly restrictive regulation have created what operators are calling "power walls" – hard ceilings on growth in markets that were once considered inexhaustible. The demand for data processing, meanwhile, is not slowing down. If anything, the acceleration of AI technologies has turned what was already a structural shortage into something more urgent. McKinsey estimates that between €240 billion and €289 billion in infrastructure investment will be needed by 2030 simply to meet projected demand – with European capacity needing to scale from 10 gigawatts today to 35 gigawatts within five years.
The industry is not facing a bubble. It is facing a capacity crisis. And that distinction matters enormously for investors paying attention.
Where the capital is moving
Secondary markets across Southern Europe are emerging as the natural beneficiaries of this shift. Among them, Portugal is drawing increasing attention – and for reasons that go beyond opportunism. Consider the geography first. Portugal's coastline sits at a genuinely rare intersection: a transit point for 17 active submarine cables, with five more in development, offering low-latency connectivity to North America, South America and continental Europe simultaneously. Among them, the Carcavelos landing point hosts the 2Africa cable system – 45,000 kilometres of infrastructure connecting 33 countries across Europe, Africa and Asia. The significance of this is difficult to overstate in a sector where milliseconds carry commercial weight.
Then there is energy. Portugal already generates 73% of its electricity from renewable sources and regularly operates on 100% green power – a distinction that has moved from a point of environmental pride to a hard commercial requirement. Data centres are among the most energy-intensive infrastructure assets in existence, and the ESG mandates now embedded in institutional investment decisions mean that green energy supply is no longer a differentiator. It is a prerequisite. Portugal's industrial electricity prices sit below the European average, adding a further layer of cost competitiveness that mature markets simply cannot match.
"There is increasing pressure on demand for data centres in Europe, which is expected to more than triple in the next five years, requiring greater data storage and processing capacity, greater power capacity and an increase in dedicated facilities. Accommodating this growth, which is expected to be extremely rapid, will involve making very large investments. In my opinion, it would be crucial for the Portuguese government to invest in reinforcing the networks and meeting these major energy needs, and companies like E-Redes and REN can help speed up the approval of these projects."
David Moura-George, Commercial Director at Athena Advisers
A market at its beginning
Portugal's data centre story is, by most measures, still in its opening chapter. Growth projections through 2031 are substantial, hyperscalers are beginning to commit capital to the region, and the government has introduced new legislative frameworks – including designated high-demand CGP zones – to manage energy allocation in a structured, investment-friendly way. A national 5G network running coast to coast further enables decentralisation, opening lower-density regions as viable locations and broadening the geographic opportunity considerably.
Challenges remain – bureaucracy, planning constraints and the absence of a fully regulated market chief among them. But as Moura-George concludes: "some challenges remain, namely bureaucracy, including at the urban planning level, as well as the fact that Portugal is not yet a regulated market in the area of data centres. However, this last factor can also work from a more optimistic perspective, in contrast to markets that are already highly regulated and where restrictions are increasingly greater. In any case, the important thing to remember is that Portugal has the capacity to become an important European data centre hub and benefit from this surge in demand and investment that is coming to Europe."
Spain and Northern Italy are credible competitors. But Portugal's combination of submarine cable infrastructure, renewable energy leadership, below-average energy costs, political stability and available land gives it a proposition that is both compelling and difficult to replicate elsewhere in Southern Europe.
For real estate investors with a horizon beyond the immediate cycle, the question is less whether Portugal will become a significant European data centre hub – and more whether they are positioned to benefit when it does.