There was a huge dilemma about the bathroom. Barely enough room to turn around let alone for a shower, sink and toilet. Moving the original doorway seemed to be the only solution, so the door and frame were taken out. If entry was gained through moving the doorway to the kitchen it would create a corner in the bathroom (where the old doorway was) for a shower. That is unless that unused corner in the kitchen became the shower instead. Genius! The walkway from the kitchen would become unusable kitchen space anyway as it could only be used to walk in and out of the bathroom. The original doorway to the bathroom can now go back in, complete with the transom window above and a normal size new shower will now be installed to the left of the window. This was a huge relief. Who would rent an apartment without a shower? Stinky people or Big Foot probably.
Since there is not extra space any place in the whole apartment, every little bit that can be carved out will be handy. So on the kitchen side above the shower nothing will be wasted, and storage will be created. It will be high up, so the occupants will need a step stool. Oh wait, there isn't any room to store a step stool, just use a chair.