The firm has been appointed by O&H Partners to begin work on the Foster & Partners designed development.

Located on the corner of Grafton Street, the seven-storey building will offer 5,400 square metres of retail and office space.

This will include lower ground, ground and first floor retail space with five storeys of office and event space above.

A three-storey basement will provide retailers with a lower ground floor and two levels of basement beneath.

McLaren will cast the central section of the ground floor slab to enable the cores to be built at the same time as excavating down and casting the basement floor slabs and liner walls.

An extensive temporary works scheme includes 33 metre deep 1.2 metre diameter piles and 15 metre steel plunge columns to support the cores and ground floor slab, allowing the basement box and jump forming of cores to happen simultaneously.

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As part of this work, the Grade II listed shop front of Wartski jewellers at 14 Grafton Street has been dismantled and will be reassembled in Barlow Place during a later phase of the redevelopment.

During this 105-week construction programme, subcontractors McGee, BHC, Techrete, Seel and All Metal Roofing will be used. Completion in Spring 2026 is being targeted.

"There is a deep and complex basement to be constructed before this beautiful new building rises above Grafton Street,” said Darren Gill, managing director (London & South East) for McLaren Construction.

“We know from considerable experience of working in the Oxford Street area that this technical feat will be pulled off in a tight site surrounded by a lot of activity. Occupiers and passers by will see a smart new addition to the West End without ever realising how precisely planned and engineered it needs to be."