Key Points
- Planning Consent Granted: Hounslow Council’s Planning Committee approved a major new data centre development on a 12.2-acre brownfield site in West London on Thursday, 6 August.
- Location Details: The facility will be situated within the Haslemere Heathrow Estate, positioned at the interchange of the Great South-West Road and The Parkway.
- Employment Space Provision: To mitigate the loss of traditional industrial and employment space, the project incorporates up to 4,150 square metres of flexible employment units tailored for small-to-medium enterprises (SMEs).
- Significant Energy Demand: The project requires a dedicated high-capacity power connection of 80 Megavolt-Amperes (80MVA), an amount of electrical capacity equivalent to the consumption of tens of thousands of homes.
- Resource and Infrastructure Friction: The decision followed debate during the committee hearing regarding the cumulative pressure data infrastructure places on the local electricity grid and water supply.
Hounslow (West London News) August 11, 2026 — Hounslow Council’s Planning Committee has granted planning permission for a substantial new data centre scheme in West London, approving the redevelopment of a brownfield site despite local debate over the facility’s intensive energy and water requirements.
The development is set to be constructed on a 12.2-acre site located at the interchange of the Great South-West Road and The Parkway within the Haslemere Heathrow Estate. The decision adds another major digital infrastructure project to West London’s growing cluster of data facilities, which serve as critical hubs for regional and global digital communications.
In addition to the primary data centre structure, the approved scheme includes provisions for up to 4,150 square metres of flexible work units designed specifically for small-to-medium enterprises (SMEs).
This inclusion was incorporated into the planning framework to compensate for the loss of traditional employment land and to ensure ongoing support for local business operations within the borough.
During the committee hearing on Thursday, 6 August, elected members debated the resource intensity of the development. A central point of discussion was the facility’s requirement for a dedicated 80 Megavolt-Amperes (80MVA) high-capacity power connection.
A power commitment of this magnitude is comparable to the electricity required to power tens of thousands of residential homes, highlighting the ongoing challenge local authorities face when balancing national digital infrastructure needs against local grid capacity and environmental sustainability goals.
What Are the Details of the Approved West London Data Centre?
The newly approved development occupies a strategic location adjacent to key transport corridors near Heathrow Airport. By repurposing a 12.2-acre brownfield parcel within the Haslemere Heathrow Estate, the project redevelops underutilised industrial land for high-tech use.
Data centres serve as the physical backbone for cloud computing, artificial intelligence, financial processing, and internet communications, making proximity to existing fibre-optic networks and transport links a key geographic requirement.
Alongside the technical infrastructure, the scheme features a mixed-use element consisting of up to 4,150 square metres of flexible employment space.
Local planning policies often require developers to offset the loss of conventional industrial or storage space, as data centres typically employ fewer on-site staff per square metre compared to standard commercial or distribution centres once fully operational.
The SME units aim to retain diverse economic activity on the site by offering light industrial or office space for smaller local businesses.
Why Did the Proposal Cause Friction Over Electricity and Water Supplies?
The debate during the planning committee meeting focused primarily on the facility’s heavy demand on utility networks. Modern data centres require constant, uninterrupted power supplies to run servers and complex cooling systems to prevent equipment from overheating.
The requested 80MVA electrical connection represents a significant allocation of capacity from the local distribution network. Across West London, the rapid expansion of digital infrastructure has placed unprecedented strain on sub-stations and high-voltage transmission lines.
In recent years, utility providers and regional planning bodies have raised concerns about grid constraints, as large-scale energy allocations to data infrastructure can limit the availability of power for prospective housing developments and other commercial ventures in the surrounding areas.
Water consumption also formed a key part of the broader resource debate. Many large data facilities utilise evaporative cooling systems that consume significant volumes of water to maintain stable operating temperatures inside server halls.
In regions facing long-term water stress, the cumulative impact of multiple large-scale data centres operating simultaneously presents ongoing challenges for water management utilities.
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Background of This Particular Development
The approval in Hounslow comes against the backdrop of West London becoming one of the largest data centre hubs in Europe, colloquially known within the technology sector as part of the FLAP market (Frankfurt, London, Amsterdam, Paris).
The corridor surrounding the M4 motorway and areas near Heathrow Airport, including Slough, Hillingdon, and Hounslow, have historically attracted digital infrastructure operators due to early investments in transatlantic fibre cables, proximity to major corporate headquarters, and access to London’s financial district.
As demand for cloud services, streaming platforms, and artificial intelligence processing has accelerated over the past decade, the volume of applications for high-capacity data facilities across London has grown rapidly. However, this expansion has increasingly intersected with utility bottlenecks.
In 2022, the Greater London Authority (GLA) highlighted that electrical grid capacity along the West London corridor was reaching critical limits, in some cases threatening to delay new residential building projects until grid upgrades could be executed by National Grid and local Distribution Network Operators (DNOs).
Consequently, local councils across West London are frequently required to weigh the national economic importance of digital infrastructure against local environmental standards, site design constraints, and the capacity of regional power and water networks to absorb large industrial loads.
Prediction: How Will This Development Affect the Local Area and Energy Grid?
The approval of the Haslemere Heathrow Estate data centre is likely to have multi-faceted implications for several distinct groups across West London:
For residents in Hounslow and adjacent boroughs, the primary direct impact will involve local utility planning and land use.
While the development reuses a brownfield industrial area—potentially reducing heavy goods vehicle (HGV) traffic compared to traditional logistics warehouses—the substantial 80MVA power draw could exacerbate existing regional grid constraints.
This high demand may influence the speed at which future local housing projects or commercial schemes in the immediate vicinity secure connection dates to the electricity network, unless broader distribution network upgrades are fast-tracked.
The inclusion of up to 4,150 square metres of flexible workspace offers direct opportunities for local businesses and trades. By providing modernized units on the same footprint, the scheme ensures that local commercial tenants are not entirely displaced by the shift toward automated infrastructure.
SMEs securing space on the site could benefit from modernised utilities and proximity to major transport corridors near Heathrow.
For electricity network operators and environmental regulators, the addition of another major energy consumer puts further pressure on West London’s decarbonisation and infrastructure timelines.
Utility providers will need to manage the high baseline demand continuously, potentially accelerating the need for local sub-station reinforcements and smart grid management systems.
Simultaneously, local authority monitoring will focus on ensuring the facility implements efficient cooling technologies to minimise both peak energy consumption and overall water usage.
