This substantial rear extension to a family home in Streatham transforms a challenging corner-plot site into a generous, light-filled living environment designed for hosting large family events. Internally, the reconfigured layout brings natural light deep into what had previously been dark, constrained rooms, while creating generous head heights and a renewed sense of openness. Ample glazing introduces daylight into the deepest parts of the plan, resulting in a sequence of bright, uplifting spaces. Part of the volume accommodates a cosy snug and practical utility areas, while the larger volume forms a spacious kitchen and dining zone designed for hosting the clients’ extended family.