Size: 250 sq. ft

Location: Tallinn, Estonia

The KODA Walking Concrete made the World Architecture Festival's shortlist of the best "Small Projects" in 2016. It's completely mobile, and can be unassembled and reassembled if it needs to move to a new location. The company that developed it, Kodasema, designed the two-tiered home so that it can be assembled in as little as four hours.

The simple design allows it to function as whatever space is needed, be it a beach house, mountain hut, café, or office.