You have no idea how jealous I am. If I was Pete Docter I would also live in a treehouse. (FYI, Docter was one of the first animators hired at Pixar, and was director of Monsters, Inc. and the upcoming "UP".) His proposed plans, designed by a Disney Imagineer, for his house in Lafayette, CA:
"He and his wife bought 15 acres of secluded, vacant land in Lafayette and proposed a 60-foot-tall artificial oak tree with three treehouses. A suspension bridge would link them to a new house on the adjacent hill. An elevator would connect the house to a garage 25 feet below, burrowed 80 feet into the hillside."
"One of the treehouses would be a bedroom, another would contain two bedrooms, and the third would be a common room, according to the application. Combined, they would have 871 square feet of space. "
The land alone apparently cost just shy of a million dollars. Pixar must be treatin' Mr. Docter right... (But seriously, I met Docter once and he was the nicest guy. I'd love to visit his treehouse.)
You can read about it here.