A two-storey home slotted into a disused alley in south London and a 1930s Surrey cottage remodelled to become a fully accessible open-plan family home are the latest projects to make the final round of RIBA’s House of the Year award.

Sandy Rendel Architects’ appropriately named Slot House delivers a 64sq m home on a 2.8m wide site in Peckham that used to be an alleyway. The two-storey, one-bedroom building uses a lightweight steel structure that is supported on a piled slab to avoid loading the neighbouring structures.

RIBA’s House of the Year jury said Rendel’s structure showed how the smallest infill sites could provide “credible habitable spaces” with enough care and attention to detail.

…