Maria and Georgs apartment is in Wedekind street in  Friedrichshain, as confirmed in the DVD commentary. The buildings in  the entire quarter surrounding Wedekindstr were part of a massive  rebuilding project in the GDR, and were completed in the early  1950s. All of the balconies that can be seen while Georg is playing  football with the children on the street, along with the ceramic  work illustrate the particular Soviet style really clearly. However,  the interior of the apartment and most of what we see of the  building interior is what would be called alt bau, effectively  old style 