You are going to want more than 32" for the toilet. 36" is standard (and perhaps even code in some areas???? Not here in Maine but I heard people saying that on other forums...) We have 34" and it feels fine but I dont think I'd want to go much tighter. You could solve that simply by flipping the closet and shower. So, have your shower -rotated 90 degrees and witha glass end wall- at the end of the tub (which is a nice setup you can see in many bathrooms, the tub deck can actually protrude under the shower glass wall and be a ledge or seat in the shower). Then the passageway moves to the left, and you can steal a bit of space from the other closet for the toilet. Either that of have a shorter vanity. 48" isn't a size I'd fight for. It's too short for a double vanity, really (unless you're using one of the new two-faucet 'trough" styles) so why not go down to 42" and have a better toilet area? For resale, though, you should consider a double vanity. Some people I guess expert truly huge ones, like at least 5+' long. But you CAN get smaller ones, Ikea has some great ones for tight spaces. But if you're not selling anytime soon, do what YOU like!! (But I still think you'll want more toilet space...)

I assume the double doors are the entrance from the bedroom? In general, I would want to add the space to the closet, as it is relatively smaller than the bathroom, but i don't care too much for a configuration that you walk through the closet to get to the bathroom. Can you add the current bathroom layout to your sketch? That will give us an idea of what could be rearranged to accommodate a potential vanity inside the space. What else do you want to change about your current layout? What are your goals?

Try on design dilemma - you'll be inundated with a range of advice of varying legitimacy and worth. Filter thru it accordingly. Regards

Contractors do not design. They build. You need an actual K&B designer. You have a very restrictive space to get all that you want without turning it into a wet room. You, and your husband especially, need to educate yourself on modern waterproofing systems and how a wet room is properly created. The Schluter system will offer a lifetime warranty if their products are used from start to finish, including their thinset. Look at their YouTube channel. And don’t be so sure that your choice tractor can actually do this properly. Especially if he hasn’t had the wetroom and waterproofing conversation with you. Read below, and have a tough conversation with him on all points raised. https://www.ceramictilefoundation.org/homeowners-guide-to-hiring-qualified-tile-installer