Carton House, Ireland, has accessible rooms
Carton House, Maynooth, County Kildare, Ireland, reviewed here, sounds like an impressive place. Reviewer Nancy Durrant describes it in inspiring terms. And, she points out, it is accessible: "The hotel is wheelchair accessible and there are nine interconnecting rooms with disabled showers. There is also a disabled lift so you can access spa treatment rooms and disability rooms in the leisure suite."
But the food. She really didn't like the food.