Commissioned to extend the terraced home in order to accommodate several generations of the same family, the studio more than doubled its existing floor area, including the addition of an end-of-garden studio building.
The rear and upper extensions provide more bedrooms and a new living, dining and kitchen space, which connects to the existing home via a skylit "atrium" at its centre.
Maximising light and views across the long and narrow plan, a wall of full-height glazing overlooks a lush garden, which ends in a stand-alone bedroom in an independent building.
"The atrium, which forms the heart of the building, brings daylight deep into the plan, therefore reducing the need for artificial light and contributing to warming up the house from autumn to spring through solar gains," explained the studio.
"The openable windows in the highest point of the atrium provide effective natural cross-ventilation in summer, eliminating the need for air-conditioning."
On the first floor, a smaller volume containing a bedroom sits above the atrium, connecting to the main house via a small bridge alongside a staircase that leads up into a loft extension.
In the existing front of the home, a former living space has been converted into an office, separated from the extension by a glass wall with sliding doors that allow it to benefit from light and views from the adjacent atrium.
Externally, the new volumes have been clad with white panels of corrugated steel, complemented by thin, white window frames in white aluminium.
The garden is lined by two white-painted walls that continue the language of the blockwork interior, with a paved patio and narrow path leading to the garden room.
Mirroring the rear extension, this additional bedroom space looks through the garden and into the main home through a fully-glazed wall incorporating a sliding door.
"The side walls of the garden are treated as a vertical extension of the horizontal surface of the garden and are used for growing climbers," said the studio.
Other London home extensions recently featured on Dezeen include a "playful and exuberant" project by Charles Holland Architects, and the addition of a charred wood-clad extension and garden studio to a family home by Mata Architects founder Dan Marks.
The photography is by Stijn Bollaert.