XS House Apartment Building by ISA. Image © Sam Oberter
In all cities around the world, there are some forms of residual space, forgotten pieces of the urban fabric, remnants of overlapping layers of past development. This land whose conditions make it unsuitable for most types of conventional construction might be a fertile ground for architectural invention. Assigning a new value to vacant corner lots, dead-end alleys and strangely shaped plots opens up a new field of opportunities for inward urban development, expanding available living space and increasing amenities in densely populated cities. The following explores the potential for experiment and urban activation held by urban leftover space.