New homes today are full of luxurysized baths, complete with whirlpools, bidets, his-and-her lavs, and plenty of floor space besides. But when it comes to adding or upgrading a bath in an existing home, remodelers are often stuck with, at best, a 5x7-foot space. And if you happen to work in an area with a lot of very old homes, as I do, you often find that when the plumbing moved indoors, the bath was stuck into even less space — perhaps under a staircase or in a former closet. So it was a real pleasure for me to design and build a bathroom in a space that had the opposite problem — more than enough