Berlin-based architect Van Bo Le-Mentzel has created “One-Sqm-House” – probably the smallest house in the world. It’s a DIY wooden structure, which uses only one square meter of space and can be used as a dwelling place, mobile kiosk or even an extra room inside your apartment. Because of the flipping mechanism, it can be used both vertically or horizontally. It has a slide window and a lockable door. The house weighs only 40 kilos and has wheels, so can be moved around easily.