I don't know about subway vs square. But here is a picture of a bathroom at the hospital I work at that was built in the early 50's. I took these several months ago as I was getting ready to tile my 4x4 wainscot. In my old bathroom it was plastered to replicate 4x4 tiles. This bathroom was built either in the 30's or 40's. Hospital bathroom: Here is my new tile: Here is the old plaster embossed tile shapes from the 30's or 40's. Note the versatile white duct tape to cover the gaping holes in the plaster: This room had reached the end of its life 15 years ago!

Sumod- The medicine cabinets are simple wood frames with a cabinet-grade plywood back that just sit in the stud cavity. Because of the dimensions, the front of the frame projects about 1"+ beyond the finished wall. The medicine cabinet doors are also plywood with veneered edges and they are attached to the frame with standard cabinet hinges (Euro hinges). The mirrors are just 1/4" plate glass ordered to size from a glass shop and held in place with mirror mastic and a metal strip at the bottom that you don't really see. The guy who did the cabinets just made the medicine cabinets as part of the job. I don't know about the door brand...we live in a large metro area that has lots of door shops and the doors are just solid core maple doors with the center cut out and a maple panel held in with molding. They're not stained; they simply have a couple coats of clear spray lacquer.

Oh...dear. It looks like he left the old floor in place. A 'mud' job isn't normally needed for regular tile. It looks like he floated (that's when you use mortar/thinset to 'level' the subfloor) the tile in a big ol' goopy layer of GUNK... I think this is a do over. You have a huge tripping hazard there. You would need a significant ramp to reduce the height difference. What USED to be on the floor? How much work did this person do for you? Was it JUST the flooring job or was it a bathroom refresh (just surface stuff) or was it a full renovation (everything removed to the studs and start again)? Please post 'in progress' photos. Often times when we see 'surface' issues (like a nasty looking tile install) we ALSO see BAD water proofing, etc... Have you paid this person?

I'll be a contrarian. I would never knowingly rent a room with a shared bathroom in the hall. That would be a complete pass - I don't even like having to use a hallway bathroom in a sleeping situation in which I would share with friends and family because if I need to use it in the night I would have to wake up more/get more decently dressed and I hate having to shlep stuff to take a shower or perform normal grooming stuff in a bathroom. I don't have the horror of viewing a toilet from a bedroom that some houzzers seem to have. It certainly wouldn't bother me on a temporary basis. I have a master bath in my home and I can't remember the last time I actually shut the door. I don't have issues with smells or humidity but perhaps that is because my Toto washlet has a built in deodorizer AND I have an excellent Panasonic fan which runs based on ambient humidity levels. I don't generally even have condensation on shower doors or mirrors after exiting let along huge amounts of humidity wafting through my bedroom. The question really is one of economics. There is a cost to installing the bathroom and OP would need to decide whether they would make up the expense by having increased rent and/or renting it out more frequently. Certainly any prospective renter would see a picture and determine whether they wanted the ensuite with a curtain in the room or use of a bathroom in the hall. Also resale value is a red herring. At such point that OP wanted to sell it would be relatively inexpensive to convert the bathroom into a closet if having the ensuite in that room was a negative.