Privately owned public space

Privately owned public space (POPS), or alternatively, privately owned public open spaces (POPOS), are terms used to describe a type of public space that, although privately owned, is legally required to be open to the public under a city's zoning ordinance or other land-use law. The acronym POPOS is preferentially used over POPS on the west coast of the US. Both terms can be used to represent either a singular or plural space or spaces.

Source: Wikipedia — Privately owned public space (CC BY-SA 4.0)