Our client had bought a top floor of a warehouse building near Old Street in London as he realised it had the potential to have access to the roof so magnificent long views over central London were possible. Technically this proved challenging, the room was tall, but not tall enough for a full height mezzanine level and planning stipulations also meant that the roof terrace could not be seen from the public domain. Our design solution included a steel work frame, which supported a new mezzanine level, which popped up above the roofline to balustrade height only. A sliding glass rooflight then allowed access to the new roof terrace when open. The landing space for the new stair to the roof terrace was enlarged to provide a study space overlooking the main living floor below and this was enclosed externally in a simple box clad in oak. The remodelled bedroom now forms a sculptural centrepiece within the whole whilst also screening the relocated kitchen dining area from the open plan living area. A new floor of oak united the whole space.