Whether in the dense urban areas of Tokyo, the wilderness of Australia, the woods of Canada, or a rooftop in Ecuador, this is the world of Small Houses. The one common point they share, is that they all have an area of no more than 100 square meters. Spanning 25 countries such as Brazil, Hungary, South Korea, Netherlands, USA, Japan, and Australia, described here there are houses designed by 57 architects, including Takeshi Hosaka’s Love2 House, Aranza de Ariño’s Casa Tiny, and the work of Jakub Szczęsny, Charles Pictet, Lada Hršak, BIG, and Fran Silvestre. This is a journey not only through recent evolutions in architectural design and creativity, but it is also a step toward a more sustainable world.