Before:

After:

Leo Tuccinardi, our plumber, is technically proficient, but we really love him because he talks to us.  I think we spent an hour or more staring at this small bathroom and making sketches on scraps of 2×4, but we figured out how to accommodate both the pipes and the floor structure.  The final framing layout bears almost no resemblance to anything you’d find in a carpentry textbook, but I’m pretty confident that the 12×24 tile in the finished bathroom won’t crack.