The scheme provides a new two-storey extension to a Victorian terraced house in West London. The client’s ambition to create a series of new rooms on the upper levels defined a massing approach where the new additions are formed from three interlocking masonry volumes. The existing narrow kitchen extension was dismantled in order to create a new kitchen and dining area at ground level with large skylight. The taller volume accommodates a study with an external terrace at first floor level; and a family bathroom at second floor level. A new zinc clad volume at roof level provides a guestroom with en-suite bathroom.