If you want to go full ADA in one bathroom, look at the shower systems with zero thresholds foam pans and linear drains. I would also pull the tile across the whole vanity and toilet wall and make the sink a wall sink at 34". Wrap the tile at wainscot height on the other side and the door side.

Instead of a shower door, you can recess a track for a curtain, too, that you normally keep open. Continue the tile from the shower across the floor without interruption. All of this will make the room seem bigger.

Storage in the recessed medicine cabinet, which you can oversize to continue across the toilet.

I don't want to be a snot, but I did almost that exact design with an accent tile strip seven years ago. With a herringbone floor!!! I'm not seeing it in design rags anymore and I fear it's headed towards being dated.

Can you move the wall between the bath and pantry and make it a reach in pantry instead of a walk in to give yourself more room in the bath?

What's the dimension between the front of the toilet and the wall facing it? By your hand drawing it looks like 4' but the floorplan looks like it's about 30". Aging in place means plenty of clearance between objects, not just how easy it is to get in the shower. Your toilet and your sink look like they're almost on top of each other, too.

I like something like this, that doubles a grab bar with a toilet paper holder:

Also, be sure to take shower safety seriously, with lots of heights of bar, and a stool either built in or to add later.

I would eliminate the accent tile. Keep things simple in your small, but smart space.

OP - I wasn't trying to be critical, as I think you know. I'm now in the age range myself where easy access (though perhaps not to ADA standards) is important.

My parents lived in a non-ADA apartment for years - and my dad, with two hip replacements, was perfectly happy with a good-sized shower with built in bench, and a little threshold he had to step over. He lived there till he passed away, aged 92. Mom lived there a couple of years more, but by the time she needed a wheelchair, she also needed to be in a facility that could provide care for her. Up till then, she was fine with that walk in, curbed, shower.

What I'm saying is, if this is for visiting parents, great idea. My parents used to stay with my sister a lot, in a downstairs library/guest room, with a powder room nearby, but in his later years, dad couldn't get upstairs to the bathroom for a shower, so I can see exactly where you're coming from. But keep it simple, and don't over-engineer. Grab bars, absolutely, but don't stress if it's not a totally wheelchair accessible area.

The other thing is, when it comes to your own aging, you're probably going to want to have a smaller house, all on one level. I speak from experience on this, having moved from a beautiful multi-level house to a single recently.

Keep in mind that grab bars need to be firmly attached to something structural in the bathroom. You can't just attach them to sheetrock and say you are ADA compliant. There are a whole host of requirements for ADA bathrooms and you should research them before you continue.

The building inspector says you can’t. Not with the clearances pictured.

Why is it too late for a curbless shower? Have you started construction? We used a tile redi pan recessed a few inches under the subfloor. Drainage can be centered if the tiles are less than 4" X 4" or along the wall for larger tile.

Also, while full on ADA is not necessary in your own residence, placement of grab bars 9 inches from edge placed vertically will be helpful and inexpensive. lI would also place one on the studs to help with standing. They can also be used down the road to locate the studs when you need to place them lower. The grab bar as a towel rack is an excellent idea, again I would locate them on the studs.

The hydro blox has a sloped entry for their pan that allows a roll in shower.

The accent tile is the most dated.

The shower and floor should definitely have the same tile. I wouldn’t do a 2x2 mosaic just because of the grout issues.