We compiled our list with the help of Altos Research, a Mountainv View, Calif.-based company that tracks housing data. It pulled pricing information for more than 22,000 ZIP codes across the U.S. for June 28 to Sept. 28, drilling down to the 500 most expensive.

http://www.forbes.com/sites/morganbrennan/2012/10/16/americas-most-expensive-zip-codes-2/