A building owned in whole by a legal entity (i.e. no dwelling in them constitutes separate ownership of other entity), which in his name have the words: "public building society" or Polish acronym TBS, irrespective of participating in costs of constructing a building of other entity (a gmina, a housing co-cooperative, a company) in return for receiving the dwellings (on rental terms) for third parties indicated by these entities.

• Building