Sandy and Sally Rendel designed and built the house to fit in the alley, which was almost the exact size 5️⃣ of a London Underground carriage, alongside their own home in Peckham.
"The major challenge was to tease spaces that were both 5️⃣ functional and delightful out of space that is no bigger than a tube carriage," said Sandy Rendel, founder of Sandy 5️⃣ Rendel Architects.
"To commit to the investment involved in developing it we wanted to be sure that the house would not 5️⃣ simply 'work' but actually be enjoyable to live in," he told Dezeen.
The architects designed the two-storey house to make as 5️⃣ efficient a use as possible of the narrow site, while creating a space that would be a bright and pleasant 5️⃣ place to live in.
To avoid placing any weight on the neighbouring buildings the house was constructed using a prefabricated, lightweight 5️⃣ steel frame, which was expressed internally to maximise the space.