This thesis aims to point out the culture of cohabitation that prevails nowadays in Berlin, its influences and ways of expression. Cohabitation is defined as the conscious choice of at least two persons, without any family bonds, living together under one roof. The choice of living in community is nowadays expressed through the paradigms of communal apartments «Wohngemeinschaften», assemblies «Baugruppen» and the so called «House Projects», which are legalized former squats.

In an attempt to interpret this matter, retrospection, of the moments that defined the everyday life of the city and its inhabitants, especially after the Word War II, is being held. The analysis of the socio-political events and developments helps in the process of understanding the collective organization and action of citizens, as a way to address the needs provoked by the defeat and destruction of Berlin. Through this analysis, the creation and development of the "non-formal architectural scene", which was expressed in an extended wave of squatting, can be explained. Finally, a presentation of the evolution of this movement today, and the other self-organized cohabitation models mentioned above is taking place.