One Berkeley Street - Colorminium

Located in London’s prestigious Mayfair conservation area, facing the Ritz, this 1970s building has been transformed from an old commercial block into a vibrant mixed-use development. Retaining 81% of the original structure, the development includes new additions such as a two-storey rooftop hotel extension, retail spaces, flagship office amenities, and a new-build annex office in Dover Yard.

Client
Crosstree

Architect
AHMM

Contractor
DE Group

Quantity Surveyor
Core Five

The Brief

Initially engaged by Crosstree we developed the façade design, alongside AHMM, to incorporate the existing material palette of Piccadilly and Elizabethan patterns, whilst observing a pre-agreed cost ceiling. The development required a contextually sympathetic design, drawing on the shapes, forms and textures of the neighbouring historic buildings.
Prior to novation to the successful main contractor, we worked up a fully coordinated design, with responsibility for the full envelope, including interfaces with pre-cast concrete, to give a seamless façade.

Our Approach

Partial demolition and structural alterations to the existing frame are a key part of the re-cladding design. With the old façade removed and a new pre-cast and glazed façade being installed, the interface and connection detailing is fundamental in the approach. A mixture of capped and SG curtain walling provide glazed infills to the façade with a series of opening vents to the office space. We focused on increasing the amount of fresh air into the building, ensuring a healthier and more comfortable environment for occupants. The natural bronze clad shop fronts and the canopy add an elegant touch, enhancing the luxurious appeal of both the retail spaces and the main entrance to the hotel providing an impressive introduction to the building. In the courtyard, pods were created to offer multi aspect views of the courtyard space, while large format sliding doors to the terrace penthouse provide expansive views across Mayfair.

Due to the constrained nature of the site, careful consideration was needed through the design to ensure the delivery methodology is as seamless as possible, relieving any pressures on the site installation. By retaining and making good where possible, the project breathes new life into the building, creating a sustainable and modern complex while preserving its historical essence.

Read about The Brief and Our Approach