A niche for your foot works for shaving but not for sitting when you end up with a leg injury or other reason for needing a bench. Especially since you want to age in place, I wouldn't forgo the bench. But a 6" ledge is useless. Built in a 12" bench on the doorway side of the shower, and make sure you have a handheld shower head in addition to the wall mount.

I get it. We are in a similar situation where we are debating on whether we should add an additional full bath or just wait a bit. For your current area/room, could that be a sort of dressing room with a tall mirror and small chair for putting on shoes in order to replace the makeup vanity? Especially since that area is next to your closet. Then just renovate the bathroom area (and add a double vanity to it) like you mentioned.

I was explaining that the master closet is underneath the roof and cannot have windows so there is no missed opportunity there. No but the opportunity is to have a better floor plan. This is a decent jumping off point, but the idea is to work to fix what doesn't work. We found a floor plan online that we liked so we went to build off of that. If you found a floor plan online, then if your "architect" modified it, then he's in copyright infringement. My in laws can hopefully come stay for one month a year and would need their own space but if it's used as a children's bedroom in the future, or guest room, that's fine too. If your in laws come to visit but one needs a walker how will they maneuver in such a small bathroom? If you're building for them to visit for a month, i'd think you'd want to get it right now so they too will feel comfortable. The bedroom bathrooms upstairs have small closets for storage . So what you're saying is that anytime the child needs to get stuff for their braces, or later their hair stuff or even makeup when older, they have to go between the vanity and the closet which is not next to the vanity. I don't have space for a fourth bedroom upstairs No one said you need a fourth bedroom upstairs. I'm asking for help and everyone is telling me it sucks without actual solutions so I'm at a loss here We're telling you it needs work. It's not there yet. I can tell you I had posted at least a dozen iterations on my plan here before we got it right. We kept going back and forth with the draftsman (if we had it to do over, we would have started with a LICENSED architect) and it was because I listened to the architects and those who knew better than me at the time on this forum, that my house basically follows all those best practices and then some. (It also helps that I do have a design background and at one point even was going to become an interior designer.) BTW: Did you check your architect's license with your state board? What direction does the house face? And what do the elevations look like? What does the roof look like?

I am sorry to be the contrarian... but for us two sinks are really a must. My wife and I often use our respective sinks at the same time and we have for years and I wouldn't want to share hers, nor she mine. We used our separate sinks simultaneously (right next to each other) in our smaller bathroom that I suspect predated television and certainly HGTV. My wife and I enjoy getting ready next to each other. In the mornings, if I am teaching an early class, I will wake her when I am done working out and we get ready together. In the evenings, we don't necessarily go to bed at the same time but we do get ready for bed together. I especially enjoy our morning conversations and that is where we typically discuss our respective schedules. Those are things I will not readily give up.