Kier has completed the construction of Concord London's mixed-use development in Marylebone Square.

Built on the site of the former Moxon Street carpark, the development forms a modern centrepiece in one of London’s prime real estate locations, and also represents the first new mixed-use city block in the W1 postcode to be developed in the last fifty years.

Designed by award-winning architects Simon Bowden and David Correia of E8 Architecture, this nine-storey, 25,160m² building includes 54 private and 25 affordable apartments. The ground and lower ground floors provide retail, restaurant and community facilities including a community hall. The lowest basement level includes parking for residents, with another basement level providing a new public parking facility.

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During the construction of the 100m long, three-storey deep basement, 50,000m3 of earth was removed. Top-down construction was used to facilitate building on a constrained site in the heart of London, with a large section of the ground floor constructed on plunge columns to remove construction traffic from the narrow Marylebone roads.

The building's design is a contemporary interpretation of a classic London mansion block with grand terraces that seamlessly blends into its historic surroundings. The design focuses on the link between indoor and outdoor living and includes a five-storey central atrium with a glass rain canopy which creates a bright and ventilated internal garden space for residents.

This inner atrium courtyard was constructed as a full ‘external space’ with its own façade. Bridges lead to each apartment’s front door, and were fully constructed off site, where all mechanical, electrical and plumbing services were also pre-installed. Forty bridge sections were lifted and installed in two weeks.