How do I make a Wet room?

Oh dear. I feel for you and your family. Good thinking about planning ahead. See if these help.

https://www.homebuilding.co.uk/making-wet-rooms-work/

https://www.diydoctor.org.uk/projects/wetroom.htm

https://www.bigbathroomshop.co.uk/info/blog/how-to-make-a-wet-room/

You will need to bring in a plumber to install a toilet and shower.

And be mindful that new or relocated plumbing usually requires a permit from city/county depending on where you live. Good luck

As a caregiver the wet rooms clients have had all had tile floors sloped toward a central drain, and tile part way up the walls. The shower area has a long metal shower rod for the shower curtain or you could do a partial wall for a roll in shower, most have a shower chair made of pvc pipe on wheels the person can be seated and seat belted into and rolled into the shower, you may need a hoyer lift, and the shower has a hand-held on a metal rod fastened to the wall so it can easily slide up and down. The tile should be a non-slip porcelain finish.

If you just want a roll-in shower I would suggest a long linear drain in the shower area.

https://www.youtube.com/results?search_query=how+to+make+a+wet+room

lift... https://www.youtube.com/watch?v=5hGFtNfpQas

chairs... https://www.youtube.com/watch?v=LRllJ7HipVM

hand-held.... https://www.amazon.com/s/ref=nb_sb_ss_i_1_23?url=search-alias%3Daps&field-keywords=handicapped+hand+held+shower+head&sprefix=handicapped+hand+held+s%2Caps%2C239&crid=29BY68LKO5TRD

I've had a parapelgic patient who had a bedroom area with a wide, 5', doorway into the bathroom, and the nicest touch was a solar tube for daylight. A heated towel rod is another good touch, big enough to place a shower blanket over to wrap them in.

Thank you for all your ideas. Sad to say my husband got worse n never got to use the wet room😕. He passed away on 3rd November😣. I am still numbed with shock. Later I will turn it into an ensuite bedroom.