The practice's first built project was an upper apartment of an Edwardian house in Hampstead which was reconfigured and extended upwards. Living accommodation was concentrated on the lower level. A central kitchen-dining room was opened across the length of the house and lit by a 4m-high vertical light shaft, cut through the side walls of the upper floor.
The newly created upper space was considered not as an object as seen from outside - its zinc-clad exterior is barely visible from below- but as an internal element in the sequence of internal volumes.
In this bright, airy space, one wall swings away to reveal a roof terrace and opposite a corner window opens to views of the rooftops and a great expanse of sky.