Customers wanted a bathroom that would serve as they aged, so a curbless shower in this small space made sense. There is a pocket door to further conserve space, and electric radiant floor heat. The long shower stall makes a doorless opening possible which further enhances manuverability in the room. The soaking tub and entire crawlspace floor are insulated and air sealed with 2 part foam, so the tub water won't lose temperature too quickly in winter and the room stays cozy.
A much discussed aspect of this room was the height of the soaking tub. The original plan was to fully recess the tub, "Japanese style", so its rim stood only a few inches off the floor. We immediately began a conversation with the customer about how she would get into and out of such a tub. Many ideas about grab bars and even a swimming pool- type ladder were discussed. Finally, after simulating various heights with mockups, it was decided the rim of the tub should be the height of a standard chair
The bather could then sit on its rim and swing her legs in, using grab bars either on the wall behind the rim or set on the rim itself- this would be determined after installation. When the tub was finally built and working, the customer had such an easy time getting in and out that we dispensed with grabs altogether. If someday in the future there's a need for grab bars, the walls are fully blocked to receive them at any imagineable spot around the tub, toilet, or shower. Blocking for grab bars has become routine for me in all my bathrooms. Unless instructed not to do so, I block the room- it's just a good and inexpensive precaution. I also provide customers with a thumb drive of photos showing buried mechanicals and other features behind the walls in case service is required later on.