Perforated steel doors fold open like the wings of a butterfly at the backstreet entrance to this London house by architects Teatum+Teatum. Named Hidden House, the residence is squeezed between two existing buildings and has a glittering facade of black render and metal filings. There are no windows, but a seven-metre-high lightwell brings natural light in from above. What do you think about this project? Do you want to live is this kind of house?