How high should toilet paper holders and towel bars be ?
The best advice is wherever they feel comfortable to you. About the only one that would be somewhat difficult to figure out when it’s time to install is the toilet paper holder, and the general rule is about 24″ off the floor, and 18-24″ forward of the toilet flange. As for the soap dish, you’d want to locate it somewhere where it won’t be in the direct line of the showerhead, even though the traditional location is the middle of the back wall, 6″ from the tub puts it right there. Putting it in the line of fire just gives water a chance to work its way behind the soap dish and shorten the life of your shower wall.