In my last post I described how the Victorian house I live in has been divided into three units. In terms of how my unit is laid out, I would say the conversion was pretty well done, with the only occasional problem being that you have to walk from room to room without the benefit of a hallway. Not all divisions are as logical. I actually bought a two-story investment property that had formerly been a single unit house, which was split into three units with a total of two bathrooms. The one unit downstairs had its own bathroom, and the two upstairs units, a one bedroom and a studio, had to share a bathroom. (See the floor plan.)
Having tenants from different units share a bathroom apparently worked well; at least I never heard any complaints. I can say that two of them did have emotional crises while they were there, but I’m sure the shared bathroom was the least of their concerns.