Pet Architecture

Pet architecture is a term for architecture that exists in small and unusual spaces. Introduced by Japanese architecture firm Atelier Bow Wow through a book of the same name, pet architecture redefines the architectural site by occupying spaces

commonly thought to be unusable for architecture. These buildings inhabit interstitial spaces in the urban environment. As explored by Atelier Bow Wow, the pet architectures are built from ad-hoc techniques, inexpensive materials and in ways that do not intentionally participate in any formalized architectural discourse. In dense urban environments pet architecture is one of many ways to deviate from standard practice and reinvent typical architectural forms and strategies. Pet architecture is the logical and pragmatic
result of acting on the same themes and conditions explored in Gordon Matta Clark’s Fake Estates.

Another image from bow wow book on pet architecture in tokyo.