http://www.slate.com/id/2219775/

Is it legal to set off in a flying house? Not without the proper certification. Most cluster-balloon systems, which carry a solo flier in a harness or chair, are considered ultralight vehicles, like hang gliders or paragliders. Under Federal Aircraft Regulations, the pilots of these vehicles must follow certain rules, such as flying only during daylight hours and staying out of particular airspaces.