The project restores the art deco landmark, built in 1937 and occupied originally by DH Evans and then by the House of Fraser until it went into administration in August 2018.

The building is badly damaged by ‘Regent Street disease’ and McLaren will be responsible for repairing the Portland stone façade, reinstating architectural features, and completing the Chapel Place façade.

Reuse of a large proportion of the façade and structure significantly reduces the new building’s whole-life embodied carbon, while the installation of high-performance windows and centralised building services will reduce operational carbon emissions.

The structural design relocates 10 steel columns retrieved from the demolished 5th floor to the new 8th floor.

The remaining 11 columns from the fifth floor have been transported across London to be re-used within another project by the same structural engineer working with a third-party contractor.

The new building replaces a department store with ground-floor retail, including two new double-height entrances, high-quality office space, two restaurants and a gym with a swimming pool.

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The sixth and seventh floors, originally designed with low ceilings for back-of-house uses, will be reconstructed, with the addition of a new terrace.

A new set-back eight-floor extension in lightweight construction is intended as a top-floor restaurant and has a terrace.

The internal area of the north-western and south-western corners of the building will be demolished and reconstructed to remove staircases, lift shafts and internal divisions, creating larger and more flexible floorplates.

The project’s development manager, Joseph McNeil, commented on behalf of Publica Properties Establishment: “The project has been a fantastic opportunity to work with McLaren Construction on a truly ‘retro-first’ approach, bringing this building back to life with the minimum whole-life embodied carbon impact.”

McLaren Construction’s London and South managing director, Darren Gill, added: “More of these asset repurposing projects are coming through to the market.

“These are often familiar buildings in prominent locations.

“They present an opportunity to improve resilience through a variety of new uses — not just for the building, but for the area too.”

“The construction industry will increasingly need the skills to repurpose historic buildings.

“It’s essential if we want to balance the creation of quality spaces with reduced carbon footprints.”