This family house faces west onto a main road in a busy area of south London. The east-facing garden is bounded by a higher and taller house to the south and an infill housing development to the east. This creates a very overshadowed space with little direct sunlight.

The proposal extends the existing property into the narrow side alleyway, building off the existing walls with a lightweight structure. This utilises the existing condition and maximises daylight into internal spaces. A large garden-facing window is supported within a timber frame, externally insulated with wood fibre insulation and finished in lime render. Above, a new glazed roof spans from the existing party wall to the existing outrigger, supported by 3 metal t-sections.