The refurbishment and re-modelling of 11-15 Grosvenor Crescent represents a unique opportunity to breathe new life into a building which has suffered from years of unsophisticated intervention and to combine it with a dynamic new addition designed to complement the historic fabric. With their Grade 2 Listings the existing buildings achieve their stature by presenting a strong and confident face to the street frontage, sitting as a mediating element between the more historic stucco terrace to the west and the 1980’s commercial architecture towards Hyde Park Corner. The scheme comprises 11 grand apartments - 3 triplex units, 1 duplex, 5 laterals and 2 penthouse duplexes. The building addresses differing townscape scales and this is articulated using materiality as well as scale and proportion in a carefully composed composition. The zone separating old and new will take its reference from other notable interventions in historic buildings such as the Asprey Store in Bond Street, the Royal Academy and the Victoria & Albert Museum – and the use of winter gardens and courtyards will bring light and air into the heart of the scheme. The existing building will be restored and where existing features have been lost, the grandeur of the original concept will be replaced. The approach to the introduction of contemporary elements such as bathrooms will be to separate them from the existing fabric – a light touch approach which will see the best of the old sitting comfortably in contrast with the new. The terrace of five buildings will remain as separate entities at ground and first floors - entrances to the substantial apartments and the main entrance to the building will reinvigorate the existing porticoed frontage. Lateral apartments on upper floors will deliver high quality residential layouts, spreading across a number of buildings and acknowledging the original plan forms by retaining party wall lines whilst maintaining a comfortable and logical flow of space through the units. The opportunity exists here to create a significant residential development in the heart of Belgravia delivering highly sustainable and beautifully crafted accommodation in an architecturally coherent composition.