Here's a tip based on remodeling experience (in the past, for others):
Design-in bathrooms that will allow for AT LEAST 30" wide doors (rather than the "traditional" 24" doors).
Although a personal residence is not subject to ADA standards, one can at least get a wheelchair through a 30" door without major modification of the entire bathroom to allow access. And very few people ever expect to wind up needing a wheelchair . . . including YOU.

(in my humble opinion this simple concept should have been built into minimal building codes a long, long time ago.)

Possible Objection:
"OMG, Trevor . . . We lost 6" out of two closets!!! Whatever shall we do???"
"There, there, Buffy . . . All is not lost . . ."