Mace Construct to transform former London City Hall into next-generation workplace
Refurbishment of landmark building focused on sustainability and modern office demand.
15 July 2026
Mace Construct has been appointed to deliver the comprehensive refurbishment of London's former City Hall, transforming the iconic riverside building into a modern, sustainable workplace while retaining one of the capital's most recognisable landmarks.
Commissioned by St Martin's Property Group, the redevelopment will see the building at 110 Queen's Walk expanded from 18,000 sq m to 22,000 sq m, creating contemporary office accommodation alongside improvements to the surrounding public realm.
Located on the More London estate adjacent to Tower Bridge, the scheme marks the next chapter in the evolution of a building that has become synonymous with London's skyline since opening in 2002.
Rather than demolishing and replacing the structure, the project adopts a refurbishment-led approach, preserving the building's distinctive circular form while upgrading it to meet modern occupier expectations and sustainability standards.
Works, due to begin this month, will include the replacement of the building's external cladding and glazing, the creation of new terraces, enhancements to the roofscape and the infilling of the central atrium. The redevelopment will also incorporate new mechanical and electrical systems, shell-and-core office space and upgraded end-of-trip facilities.
Beyond the building itself, the project includes improvements to the surrounding public realm, including enhancements to The Scoop amphitheatre, adjacent green spaces and Queen's Walk along the south bank of the River Thames.
The appointment carries added significance for Mace, which originally delivered the building as part of the wider More London development more than two decades ago. Returning to refurbish the landmark reflects the changing priorities of the commercial property market, where retaining and upgrading existing assets is increasingly viewed as an alternative to wholesale redevelopment.
The project also highlights the growing emphasis on extending the life of existing office buildings while improving their environmental performance. As occupiers continue to prioritise premium, sustainable workspace, developers are increasingly investing in major refurbishments that reduce embodied carbon while delivering the specification expected of next-generation offices.
Ged Simmonds, Managing Director, Private Sector at Mace Construct, said the redevelopment would create a high-performing, sustainable workplace while preserving the long-term value of one of London's landmark buildings. He added that the project reflected the industry's wider shift towards sustainability-led office refurbishment and net zero carbon objectives.
The redevelopment of the former City Hall is the latest example of London's evolving office market, where refurbishment is playing an increasingly prominent role in meeting demand for high-quality workspace. By combining the reuse of an established building with significant environmental upgrades and public realm improvements, the scheme demonstrates how existing commercial assets can be repositioned to meet the changing needs of occupiers while supporting wider sustainability goals.
