Conversion and enlargement of a former piano warehouse in Camden to create new offices for a successful and expanding digital design company. Formation of a new basement and insertion of a new mezzanine more than doubles the available floorspace, and a new roof construction will allow the introduction of daylight and ventilation into a constrained site. Fire curtains and thoughtful configuration of staircases keep the internal space as open as possible. This project aims to express the materials of construction and avoid as far as possible the encasement of either structure or services. It is partly to maintain as much as possible the sense of volume and partly to pursue the architectural goal of honesty to component parts.