Informal Urbanism
The production of urbanization independent from formal frameworks
and assistance (if they exist) that do not comply with official rules and regulations.
Less formally, DIY alterations to urban spaces, especially public spaces, by people.
Here more about it, and many examples positive and negative, in the 99 Percent Invisible podcast episode below.
https://twitter.com/digitalcitizen/status/1180610556581036034
Digital Citizen 