This substantial refurbishment of a Grade II listed townhouse in Belgravia involved the lateral conversion and fit-out of a two-storey residential dwelling. The property underwent a complete electrical and mechanical fit-out with new mains services and was finished in a palette of terrazzo stone, equine leather and horsehair panelling. A bespoke glazed extension to the rear of the property was also formed. At its heart is an elliptical staircase comprising a skeletal stainless steel frame with an undercarriage of pitted stainless steel sheeting that sweeps the contour of the ellipse itself. The treads and risers were then clad in pre-cast terrazzo by Vicenza-based stone specialists, Laboratorio Morseletto.