Key Points
- Hounslow Council’s Planning Committee has granted outline planning permission for a major data centre redevelopment at the Haslemere Heathrow Estate on Silver Jubilee Way, Cranford.
- The project, brought forward by Brixton (Heathrow Estate) Ltd (linked to Kennedy Wilson), will replace existing structures with up to 50,000 square metres of data centre space and 4,150 square metres of SME workspace.
- The facility will feature an 80MVA power connection delivering an estimated 48MW IT load via the Laleham Grid Supply Point, raising local energy strain concerns.
- A mandatory operational water-consumption reduction strategy has been imposed to mitigate heavy demands on West London’s constrained water infrastructure.
- The application now awaits Stage 2 referral to the Mayor of London, with key reserved matters—including detailed scale, layout, landscaping, and appearance—subject to future approval.
Cranford (West London News) August 24, 2026 – Hounslow Council’s Planning Committee has officially approved outline planning permission for a massive data centre redevelopment project located at the Haslemere Heathrow Estate on Silver Jubilee Way in Cranford. The scheme, spearheaded by developer Brixton (Heathrow Estate) Ltd—a company linked to real estate investment firm Kennedy Wilson—involves the complete replacement of current estate structures to construct a facility comprising up to 50,000 square metres of data centre floorspace. Alongside the primary digital infrastructure, the plans incorporate approximately 4,150 square metres of dedicated workspace tailored for small and medium-sized enterprises (SMEs), ancillary offices, internal plant areas, electrical substations, vehicle parking, servicing zones, cycle storage, emergency flues, and comprehensive site earthworks.
While outline planning permission establishes the principle of the development, critical architectural details—including the final scale, external appearance, landscaping, and structural layout—have been reserved for subsequent approval stages. Additionally, because of the massive scale and strategic nature of the development, the proposal must now undergo a Stage 2 referral to the Mayor of London before final consent can be fully enacted.
What Are the Key Power and Water Demands of the Cranford Data Centre Scheme?
The approval highlights the continuing expansion of data infrastructure clusters across West London, a region that has become a major hub for digital hosting due to its proximity to international communications trunk lines and Heathrow Airport. However, the Cranford development brings significant resource requirements that have drawn scrutiny from environmental groups, local resident associations, and regional planning bodies.
The project requires a substantial electrical capacity, featuring an 80MVA connection designed to deliver approximately 48MW of IT load. This power supply will be routed directly through the Laleham Grid Supply Point. The sheer scale of this energy draw has reignited ongoing debates regarding grid capacity across the Greater London Area, where rapid data centre expansion has placed unprecedented stress on local distribution networks and raised questions about long-term grid stability.
Resource management concerns extend beyond electricity to local utility networks. Modern industrial data facilities depend heavily on continuous water usage for evaporative cooling systems. In a region already identified as water-stressed, adding large-scale industrial cooling demands creates considerable pressure on public utility infrastructure.
To address these environmental risks, Hounslow Council made outline permission conditional upon the submission and approval of a formal operational water-consumption reduction strategy. This regulatory measure requires the developer to prove that the site can deploy advanced closed-loop cooling, water recycling, or alternative non-potable cooling technologies to minimize its reliance on the main water supply.
Background of the West London Data Centre Expansion
The approval of the Haslemere Heathrow Estate facility is part of a broader, multi-year trend that has seen West London transform into one of Europe’s premier data centre corridors. Spurred by cloud computing growth, artificial intelligence training, and streaming services, developers have actively targeted areas such as Hounslow, Slough, and Hayes due to high-density fiber-optic connections and proximity to London’s commercial core.
This rapid industrial shift has increasingly clashed with regional utility capacity. Over recent years, both the Greater London Authority and energy distributors have flagged severe constraints on the high-voltage electrical grid in West London. In several instances, housing developments and commercial projects faced potential delays because local substations were operating near maximum capacity—largely driven by the heavy baseload requirements of data facilities. Similarly, water utility companies across South East England have repeatedly warned of long-term supply deficits, urging stricter planning controls on water-intensive industrial developments to preserve public reserves during seasonal droughts.
Prediction: How Will This Development Affect Local Residents and Businesses?
The approval of the Cranford facility will have distinct long- and short-term implications for different sectors of the local community and regional economy:
- Local Residents and Utilities: Residents in Cranford and the wider Borough of Hounslow may not see immediate physical impacts during the outline phase, but long-term construction and operation will alter local traffic and noise baselines. More significantly, the heavy electrical draw on the Laleham Grid Supply Point and ongoing water consumption could heighten regional vulnerabilities during peak demand periods or environmental droughts, unless the developer’s water reduction strategy proves exceptionally effective.
- SMEs and Commercial Tenants: The inclusion of 4,150 square metres of dedicated SME workspace provides a direct benefit to the local economy. Small businesses looking for modern, well-connected premises near Heathrow Airport will gain access to new commercial stock, potentially fostering secondary economic growth and local service jobs.
- The Tech and Real Estate Sectors: For digital infrastructure operators, the approval signals that West London remains open for data centre development, provided projects incorporate robust mitigation strategies for utility draw. It sets a regulatory precedent where securing planning consent relies entirely on demonstrating strict energy efficiency and verifiable water-reduction standards.
