I am not sure about the other buildings but in mines if my neighbors flushed their toilet and you in the shower then you better WATCH OUT!!! this is not safe for your kids. I had a problem with my toilet backing up with other peoples "you know what". Everything else was ok didnt have to worry about anyone breaking into my apartment or car. Everyone stays to them selves never had any problems with any neighbors. Water, heat, and cooking gas is included.