Thank you! I think that the extra shower length, as long as it is at least 32” wide, may work well if there is sufficient clearance for the door to the shower.

My notion is that the sink would be tucked into the left corner (as you walk in) and about 20” wide, no more than 16” deep, nearly meeting the shower, which would have the long side going to about the end of the current window. We could move that window down the wall, and we would swivel the toilet so that it has the appropriate 30” allowance side-to-side, and if 27 long, we would have nearly 30” in front of it, before the wall with the door.
I appreciate your response, and any more reactions welcome!

A 32" shower is tight. The 42" length helps a lot. Our master bath shower, which we finally tore out during a massive remodel, wasn't even 36"x 36". I truly think it was the size of a phone booth. It functioned for many years, but I sometimes had bruises on my elbows after shampooing my hair with my long arms. It worked, but it was not wonderful. I have no experience with a neo shape shower which might be really tight. Thinking "out loud", the questions are: how often will it be used? Who will use it? Are you large people in height/girth? Is it functional and practical for your purposes? Is the floor space more important? Is it important for resale value?

Thank you, Cavimum! We are a couple, medium to largish size. The biggest goal is to create a 3/4 bath on the main floor so that we and guests can use it without going upstairs (where we have a shower-tub). The study behind the current laundry/bath can function as a secondary guest room.

I am glad to hear that you think added length could make it comfortable. For resale, I think the addition of a secondary shower so that each bathroom could be used simultaneously will help boost the home value, without over-improving. We had considered pushing out the wall where the washer dryer area is now, but that would entail more expense. It might give us greater accessibility, but this is an old folk Victorian with bedrooms upstairs, so it has some other constraints. I appreciate your comment and questions!

Will you be looking at the toilet as you enter the home?

I like the idea of a washtower in the new alcove outside the bathroom. They may be 30 inches deep, but realistically with the clearances needed will more likey be 35 inches deep.

I wonder if it woud be possible to move the west bathroom wall 12 inches over into the study. Then you could put a 60 X32 inch shower where the washer and dryer were. Then have the sink on the right wall as you enter with the toilet next to it facing the shower.

Will this guest bedroom/study be used often? Maybe you could forego the shower. The occasional guest could use the shower upstairs or downstairs.

Thank you - I am trying to avoid cutting into the study, but nothing is without trade-offs. Because of the ceiling line, it might not look good to do that - the ceiling in the study is about 14 feel high on the end near the wall that abuts the dining room, and slopes down to around 8’ at the sliders. The bathroom and little corridor, however, are standard height all the way across. We only have one 1 and 1/2 bathrooms in the house as is, so the 3/4 bathroom with shower downstairs is a priority.
I really appreciate the feedback!

IMO a 60" long shower is nice but isn't necessary. We now have that and it is a lot to squeegee and clean. ;-p

If you can access some foam-board, corrugated cardboard (even spliced together with duct tape) or anything else that is lightweight and inexpensive, create a 3-D mockup of the space, step into it, and go thru the actual motions of showering and hair washing. That is the best way to test drive dimensions and their practicality, IMHO.

That is a great idea! Thank you!

Hello Millworkman, cavimum and KarenSeb - I think I have an idea that could work, and takes into account your comments. It is to have less space side-to-side for the laundry tower, and give it the shower, which would start in an alcove the same depth as the laundry tower (about 32-34") and continue into the bathroom, probably with some free space at the end. I would like the shower to be long enough for at least a teak stool or flip down, and it occurred to me that in our climate there's a problem with putting the supply lines on an exterior wall. If I were to do this, it would allow the sink and toilet to stay where they are, but probably best if they are each less deep, perhaps by using a wall hung toilet and either a wall hung sink, or a narrow and shallow one.

This idea would make the bathroom area an "L," with about 10 inches for that part of the "L" that contains the beginning of the shower, and a wall behind it for the supply lines that feed both the laundry tower and shower. I don't know if this is hard to visualize - it was certainly hard to figure out, and I don't know if I have created another problem!

I am going to start a new discussion, I think. Thank you all.