One of the benefits of building a custom bathroom is that you can make it handicap accessible while using the Americans With Disabilities Act’s required minimum specifications as a guideline. This includes ADA guidelines for placement of the sink and toilet, doorway dimensions, clearance guidelines, and information for the location of grab bars and towel rails. Private residences do not have to adhere to the ADA guidelines, but you still may use them as a reference point when designing and building.
Any area of the bathroom, from the main floor to the shower, should have at least 60 inches of clearance in all directions so the wheelchair and its user can move around freely. This is 60 inches off the face of finish components such as the sink edge, grab bars, the toilet,