UNITED KINGDOM —Transport for London (TfL) has announced its intention to award a comprehensive design and build contract to infrastructure solutions firm Costain for step-free access and station capacity improvements at South Kensington Underground station. Procurement for the project is structured under TfL's Infrastructure Improvement Framework. Scope of work encompasses detailed engineering design and construction work, including installing accessible routes connecting the ticket hall, pedestrian subway, and platforms serving the Circle, District, and Piccadilly lines via a new entrance on Thurloe Street. The project also entails restoring historic platform elements and reopening a dedicated eastbound platform for Circle and District line trains.
Transport for London is the local government body responsible for managing the public transport system across Greater London. Costain Group PLC is a British technology-led engineering and construction company providing infrastructure delivery and consultancy services to transport, energy, and water sectors.
The expansion targets severe operational bottlenecks at one of London's busiest transit hubs, which serves major cultural institutions, academic campuses, and medical centers. The financial structure for the capital scheme combines funding from TfL's Business Plan with a £12 million contribution from the Royal Borough of Kensington and Chelsea alongside external support from the 1851 Commission. Initial enabling work in a retail property on Thurloe Street is scheduled to begin before the end of the year to prepare the site for main construction, with full project completion targeted for 2031.
For urban transit authorities, civil engineering contractors, and local commercial real estate developers, this contract award underscores sustained public investment in urban transit modernizations and accessibility retrofits. Upgrading step-free infrastructure and expanding platform capacity reduces passenger congestion and transit delays across Central London. Furthermore, integrating transport infrastructure upgrades with adjacent property developments demonstrates an effective framework for public-private partnerships in urban regeneration.
