They actually built a replica of the house from the blockbuster, Pixar's Up. This was a recreation by a new show on the National Geographic Channel show called How Hard Can it Be? Supposedly the show already aired back in November of 2011, however I have not seen or heard about it.
Yesterday morning, March 5 at dawn, National Geographic Channel and a team of scientists, engineers, and two world-class balloon pilots successfully launched a 16' X 16' house 18' tall with 300 8' colored weather balloons from a private airfield east of Los Angeles, and set a new world record for the largest balloon cluster flight ever attempted. The entire experimental aircraft was more than 10 stories high, reached an altitude of over 10,000 feet, and flew for approximately one hour.
I hope you enjoy the pictures as much as I did. Floating house anyone? Up, up and away. (From MyModernMet.com)