London has emerged as the largest hub for artificial intelligence (AI) data centres in Europe, sparking concerns over competition for energy, space, and water resources between these facilities and local housing developments. This tension has prompted calls from residents and advocacy groups for stricter controls or moratoriums on new data centre projects, similar to measures implemented in cities such as Amsterdam and states like New York.

A notable flashpoint is Potters Bar, on London’s northern fringe, where an 85-acre area of greenbelt land is slated for one of Europe’s largest data centre developments, led by Equinix. Local residents, including Ros Naylor, co-founder of the Potters Bar Special Interest Group Residents’ Association, have opposed the project for over a year through petitions and protests. Naylor argues the development threatens community well-being due to continuous operational noise, increased traffic, and environmental degradation, while consuming energy that she believes could instead power hundreds of thousands of homes.

The clash between housing needs and the data centre expansion reflects broader global disputes. Across London, from east London’s Brick Lane to other parts of the UK and internationally, public pushback against large-scale AI infrastructure projects is intensifying. A December report from the London Assembly highlighted that the rise in electricity demand from data centres contributed to significant delays in housing construction, particularly in west London boroughs such as Hillingdon, Hounslow, and Ealing, where the electricity grid reached full capacity in 2022. New housing developments faced delays of up to 15 years while awaiting grid connections.

In response to these pressures, the Greater London Authority (GLA) introduced a draft policy in July as part of the London Plan. The policy encourages identifying “suitable” locations for data centres, calls for mitigation of community impacts, and promotes sustainability measures such as efficient electricity use and waste heat recovery. However, critics question whether these recommendations are sufficient to address the scale of the problem.

James Small-Edwards, chair of the London Assembly’s Planning and Regeneration Committee, considers the policy a positive step but stresses the need for genuine enforcement to ensure that data centres are placed appropriately and that their effects on communities, energy infrastructure, and housing development are properly managed. Steve Turner, executive director of the UK Home Builders Federation, highlights ongoing capacity constraints in the electricity network, noting the added pressure from wider electrification efforts as the UK pursues net-zero greenhouse gas emissions by 2050. These include increased electricity use in homes due to electric vehicles, heat pumps, and air conditioning, compounding the challenge of simultaneously supporting data centres and new housing.

Data centre electricity consumption is substantial: estimates for Great Britain indicate usage at around 7.6 terawatt-hours (TWh) in 2025, with projections approaching 71 TWh by 2050. Campaigners point to individual facilities with energy demands comparable to hundreds of thousands of homes. Donald Campbell, director of advocacy for Foxglove, a UK tech justice organisation, calls for mandatory requirements for data centre developers to build on-site renewable energy generation and storage capacity. While the London Plan encourages renewable energy use on-site, it does not mandate it.

Environmental concerns extend beyond energy demand. Many data centres rely on backup diesel generators and source electricity from grids still partially powered by fossil fuels, leading to significant greenhouse gas emissions. For instance, Google’s planned hyperscale centre in Thurrock is projected to emit upwards of half a million tonnes of CO₂ annually, equated to hundreds of short-haul flights per week. Similarly, developments near London have proposed new gas-fired power stations to meet their energy needs, raising community health and climate concerns.

Water scarcity is another issue. Data centres often require large volumes of water for cooling—sometimes over one million litres a day—amid ongoing water stress in London and the South East. Though the draft London Plan calls for water-efficiency measures, it sets no specific limits. The mayor has acknowledged the possibility of water shortages in London within 25 years.

On the financial front, increased electricity demand from data centres can drive up energy prices as grids turn to expensive, less efficient generation to meet spikes. A report from Ireland, where data centres consume nearly a quarter of national electricity, estimated that households have paid hundreds of millions of euros more due to data centre expansion, with further increases anticipated.

Developers maintain that they are taking steps to minimize environmental and community impacts. Google highlights its Waltham Cross site’s use of non-potable water for cooling and heat recovery systems and aims for near 95 percent carbon-free energy use across UK operations. Microsoft has cited innovations in design and rainwater harvesting at its Park Royal site. Equinix claims its Potters Bar facility will be powered entirely by renewable energy, avoid water usage in cooling, enhance biodiversity, and retain significant open space.

Despite these assurances, local residents remain skeptical. Ros Naylor contrasts London’s approach with Amsterdam, where new data centre development was restricted by a moratorium starting in 2019, followed by strict location and sustainability criteria and a further five-year pause announced in 2025. Amsterdam prioritizes housing and urban space over data centre expansion due to limited electricity and land capacity.

Similar moratoriums or freezes have been enacted or considered in various jurisdictions, including Scotland, New York State, and Ireland. Ireland lifted its national moratorium in late 2025 but introduced stringent requirements for new data centres to install on-site power generation or battery systems, contribute renewable energy to the grid, and limit grid electricity use to 20 percent of annual demand. The country is also diversifying data centre locations to “green energy parks” near renewable sources.

Some experts view these approaches as potential models for London. Small-Edwards expresses cautious optimism about Ireland’s measures, while advocating for their consideration in London’s final policy. Campbell contends the current draft leaves too much flexibility for developers and calls for enforceable conditions that protect water, energy, and environmental resources. Turner urges the government to prioritize infrastructure upgrades addressing these constraints to avoid jeopardizing housing targets.

For now, with data centre construction accelerating in London despite rising concerns, critics describe the situation as a “free-for-all,” underscoring the unresolved tensions between technology infrastructure growth and urban sustainability priorities.