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Hadley Property Group has lodged plans to convert the former GlaxoSmithKline headquarters at 980 Great West Road into a mixed\u2011use neighbourhood of roughly 2,300 homes and 30,000 m\u00b2 of commercial space, proposing a reuse\u2011led retrofit of the 18\u2011storey office tower alongside new public realm, diverse housing tenures and a 35% affordable housing minimum.<\/p>\n<\/div>\n
Hadley Property Group has submitted a hybrid planning application to transform the former GlaxoSmithKline headquarters at 980 Great West Road in Brentford into a large mixed\u2011use neighbourhood, proposing roughly 2,300 homes alongside about 30,000 m\u00b2 of commercial space. The application centres on an ambitious reuse of the 18\u2011storey, c.100,000 m\u00b2 office block: Studio Egret West would strip the 23\u2011year\u2011old building back to its core, retaining the basement and parts of the substructure while remodelling the tower into residential accommodation. According to the developer, the retrofitted block will offer generously proportioned homes with oversized balconies, extensive communal amenity and a rooftop conservatory. (Sources: Architects\u2019 Journal; Studio Egret West.)<\/p>\n
The site carries a recent commercial pedigree. The original office complex \u2014 reported at an initial cost of around \u00a3300 million and opened in 2002 by then\u2011prime minister Tony Blair \u2014 was one of the UK\u2019s largest single commercial developments of its era. GSK agreed the sale of the 5.4\u2011hectare campus in 2021 and subsequently relocated staff to a new central London building; Hadley\u2019s acquisition of the Brentford campus was confirmed as completed in November 2024. (Sources: Architects\u2019 Journal; The Independent; Peterson Group press release.)<\/p>\n
The submitted proposals sit within a masterplan led by Haworth Tompkins that envisages roughly 17 separate buildings across the campus. The developer bills the scheme as \u201cone of the UK\u2019s most ambitious reuse\u2011led developments\u201d, arguing the approach will preserve and repurpose significant existing structure rather than pursue wholesale demolition. Other architectural practices appointed to plots across the site include dRMM and McGregor Coxall, with a broad consultant team featuring Buro Happold, Walsh engineers, Turley, Metropolitan Workshop and Neighbourly Lab. (Sources: Architects\u2019 Journal; Studio Egret West; dRMM; Peterson Group.)<\/p>\n
Design detail in the publicly released materials emphasises both retention and reinvention. Studio Egret West and partner teams propose reusing steel salvaged from demolished sections to form new extensions, and to reconfigure the tower to create larger apartments, generous balconies and activated ground\u2011floor edges. Landscape proposals aim to give almost two\u2011thirds of the campus over to public realm \u2014 including play areas, gardens and enhanced riverside access \u2014 while plans also show new pedestrian and cycle connections and activation of under\u2011croft spaces beneath the M4 flyover. (Sources: Studio Egret West; dRMM; Architects\u2019 Journal; local reporting.)<\/p>\n
The scheme is housing\u2011led but deliberately mixed in tenure. The planning submission sets out a programme of homes that draws on a variety of models \u2014 Build to Rent, co\u2011living and purpose\u2011built student accommodation among them \u2014 and pledges a minimum of 35 per cent affordable housing. Project literature and some partner communications describe the overall housing figure in slightly different ways (some materials reference a housing total \u201cof roughly two thousand\u201d), but the application as reported to the press seeks around 2,300 new homes across the campus. (Sources: Architects\u2019 Journal; Studio Egret West; dRMM.)<\/p>\n
Sustainability and circular\u2011economy principles are a recurrent theme in the team\u2019s narrative. dRMM and others have flagged an approach that prioritises material reuse and the integration of existing buildings and substructure into new configurations, while Hadley\u2019s design team includes specialist sustainability and engineering advisers to test low\u2011carbon retrofit and infrastructure options. The project team has indicated further planning activity and engagement will continue through 2025 as the application progresses. (Sources: dRMM; Architects\u2019 Journal; Peterson Group.)<\/p>\n
Hadley says its proposals have been shaped by an extensive co\u2011design process with local people. Over the past 18 months the developer and Haworth Tompkins \u2014 supported by Metropolitan Workshop and Neighbourly Lab \u2014 say they have engaged hundreds of residents, community groups and stakeholders in workshops and exhibitions to ensure the emerging plans reflect local priorities. Local reporting and the scheme narrative also stress ambitions to reconnect the site with Boston Manor Park and Brentford town centre, and to open the campus up to public use. (Sources: Architects\u2019 Journal; Studio Egret West; BrentfordTW8; BE News.)<\/p>\n
\u201cDelivering the homes, infrastructure and social value London needs requires genuine collaboration between the public and private sectors,\u201d Andy Portlock, chief executive of Hadley, said in the project\u2019s public materials, adding that the proposals were brought forward \u201cthrough ongoing engagement with residents and businesses\u201d. The application will now be considered by the London Borough of Hounslow and the Greater London Authority, who will weigh the claimed benefits \u2014 substantial housing delivery, public realm improvements and a reuse\u2011led sustainability case \u2014 against any local concerns about scale, transport and construction impacts. (Sources: Architects\u2019 Journal; Peterson Group; dRMM.)<\/p>\n
The developer frames the Brentford plan as a test case for large\u2011scale retrofit and reuse in a city where land and embodied carbon constraints are increasingly shaping development choices. Whether planning authorities regard that argument as sufficient \u2014 and whether local communities feel the balance of new homes, affordable accommodation and public benefit has been struck fairly \u2014 will determine if this former corporate campus can be transformed, as proposed, into a new mixed\u2011use neighbourhood. (Sources: Architects\u2019 Journal; Studio Egret West; dRMM; BrentfordTW8.)<\/p>\n