Under the £8m contract, ISG will reconfigure the property’s internal layout and maximise leasable space by constructing an additional floor at roof level, to create six storeys of commercial office accommodation. Client is Standard Life Investments.
The 1980s building in the St James’ Conservation Area of Mayfair will be modernised throughout as part of the scheme, with ISG installing new flooring, suspended ceilings and upgrading mechanical and electrical services to deliver BREEAM ‘very good’ accommodation.
At roof level, ISG will construct a single-storey steel frame extension with extensive glazing, creating an additional 4,000 sq m of contemporary open plan office space, which increases the building’s floor area by approximately 32%.
The building’s façade will also be remodelled, with ISG replacing all the existing windows and installing new glazed units that cantilever out by some 700mm. The contractor will repair the building’s stone cladding.
A glazed reception area will be created at ground floor level and three new lifts will be installed. A new toilet core will also be created at the side of the building.
The entire project is scheduled for completion by summer 2013.
Stuart Deverill, ISG’s managing director - London, said: “Our latest scheme for Standard Life Investments highlights the resilience and demand for high quality commercial office accommodation in the West End. Comprising significant structural alterations to the existing property, the project at 23 King Street highlights ISG’s strong credentials in the delivery of complex, logistically challenging office projects.”