due to an illness, my father has recently become immobile and needs to be in a wheel chair. Our old house has very small rooms and bathrooms. My concern is the bathroom. My husband and brother are planning on adding an addition which will include a bedroom and bathroom. Can you help me with ADA accibility codes, and possibly suggest how to arrange the bathroom to make it comfortable to manuver a wheel chair through it. I really appreciate you time and effort in this project. Thank you...