Montcalm Mayfair

Situated on a graceful crescent a short distance from the Marble Arch in London’s Hyde Park, Montcalm Mayfair is a 5-star hotel set behind a Grade II-listed terrace within the Portman Estate Conservation Area.

In 2017, Westminster City Council approved our plans for an infill extension to provide 12 additional bedrooms alongside the wider refurbishment of the 151 key hotel, comprising a new lobby, reception, restaurant, and lounge. This expansion promises to offer a new level of luxury and comfort to guests.

Our design re-establishes the hotel’s relationship with Wallenberg Place by reinstating the crescent internally as a principal axis. The interiors have been designed by Studio Mica & Studio Est to evoke memories of classical London, elegant and timeless, with a contemporary edge.

Technical Resolution

The site for the extension, above the former restaurant, is enclosed on all sides by buildings. Complex site constraints meant that a crane was not viable, and therefore, all the steel members had to be installed by hoist, in short sections - and manoeuvred by hand.

The steel and concrete composite deck was selected to minimise the internal linings required to achieve the prerequisite fire and acoustic separation. A carbon saving measure.

The structure was designed by engineers Heyne Tillet Steel, and the technical design was developed with Box Architects using Building Information Modelling (BIM).