The hallway is no problem. It could just have another 45 in it right behind the kitchen wall. It'd be unorthodox, but I have definitely seen wonkier shit in old apartment buildings. The real problem with it is that it's not depicted with such a bend at the end of it in the episodes where we do see down the length of the hall.

But I'm pretty sure the location of the bedroom as depicted to the right of the bathroom and where the bicycle hangs (right?) is also physically impossible. All the floor plan mockups I've seen place the bedroom to the left, but I'm pretty sure in the show it was depicted as being on the right.