The boom in artificial intelligence is creating a problem that barely existed five years ago. Data centres, the vast warehouses that power everything from ChatGPT to your Netflix recommendations, are consuming enormous amounts of electricity and freshwater. And this infrastructure sprawl is starting to matter for UK homeowners in ways most people haven't yet considered.
This week, China switched on the world's first wind-powered underwater data centre near Shanghai. It's an engineering feat worth paying attention to, not because of the novelty, but because it reveals something about how countries are scrambling to manage an infrastructure crisis that could reshape property values, energy costs and local development patterns across Britain.
The hidden cost of AI
Traditional data centres are energy hogs. Between 25% and 40% of their total electricity consumption goes on cooling systems alone, keeping thousands of servers from overheating. That's a staggering amount of power dedicated to air conditioning in a building.
But the water problem is even more alarming. According to the United Nations University Institute for Water, Environment and Health, data centres could consume 9.3 trillion litres of water annually by 2030. To put that in perspective, that's enough to meet the entire annual domestic water needs of 1.3 billion people across sub-Saharan Africa.
Right now, the UK's average house price sits at £268,132, and most homeowners are focused on mortgage rates hovering around 6.6% on two-year fixes. But energy and water infrastructure will increasingly affect what homes cost to run and where developers build new properties.
Why the property market should care
Data centres aren't usually considered part of the housing conversation, but they should be. Several reasons why:
First, planning. Local councils deciding where to permit large data centres are essentially deciding which regions will face increased water and energy demand. Areas with good broadband but limited water infrastructure could become less attractive. Conversely, regions with renewable energy and plentiful water supply will see development interest shift towards them. This shapes local house prices.
Second, utility costs. When data centres compete with residential areas for freshwater and grid capacity, everyone's bills can rise. A homeowner in a region where data centre demand is highest might face higher council tax or water rates. Your mortgage payments might be affordable, but running the home gets pricier.
Third, local planning controversy. Data centres attract planning objections from residents worried about traffic, noise, land use and environmental impact. These disputes can delay broader development, affecting housing supply and pushing prices up in already-constrained markets.
What's being done
The Shanghai project is instructive because it tackles two problems simultaneously. By submerging the data centre 10 metres underwater and powering it with offshore wind, operators cut electricity consumption by more than 20% compared to traditional land-based facilities. Seawater provides natural cooling, eliminating the need for energy-intensive chilling systems and reducing freshwater demand entirely.
Microsoft pioneered this concept in Scotland back in 2018, but progress stalled. China has moved faster on commercial deployment by combining strong AI investment policy, industrial capacity and marine engineering expertise. The lesson for Britain: government support and planning clarity matter enormously in bringing solutions to market.
The UK hasn't yet adopted this approach, though our coastal regions would seem well-suited to it. Whether the government pursues similar projects remains unclear, but international competition in data centre efficiency is intensifying.
What homeowners should watch
If you're selling a home, consider whether your region is attractive to data centre investment. Areas with good grid connections, water access and planning flexibility may see commercial development that either boosts or depresses residential values depending on how it's managed.
If you're buying, research local utility infrastructure and future development plans. A new data centre nearby could affect water pressure, energy costs or council services. It's not a deal-breaker, but it's worth understanding.
For long-term owners, energy efficiency in your home becomes more valuable as competition for grid capacity increases. Properties with solar panels, heat pumps or good insulation won't just feel modern, they'll actually insulate you from future energy price pressures.
With CPI inflation at 2.8% and house price annual change at 0.0%, the property market is relatively calm. But the infrastructure beneath the property market is moving fast. Keeping an eye on data centre development in your region isn't glamorous, but it could quietly influence your home's future running costs and neighbourhood character.