@minimia
i can only speak for Ct.Bern it may well be that it's different in Ct.Vaud,which i admit,have no insight into.
In the appartment blocks hubby owns,we have to do it this way,and I was told by the agency that helps me managing the estate, that this is done so by law here.
Your building was certainly not illegal and I like what you write about getting on with each other!This is what living in appt.blocks should be
Have a nice evening!