Mayfair Chambers is a 12,000 ft2 new build residential development with a mix of 2, 3 and 4 bed apartments for sale. There are five storeys above ground including two set-back penthouse levels, and an inhabited basement storey. The topmost penthouse level features a curved glass facade which was designed and tested to minimise the profile of this level as seen from the street, maintaining floor area within tight planning constraints. Special attention was paid to the design of internal circulation and to the basement level, which exploits a modern interpretation of the London ‘area’ to maximise daylight.