Tony Stark aka Iron Man who lives in the coolest house in the entire freakin’ world is, sadly, as fictional as the dwelling. The film’s director, Jon Favreau, tells us that the exterior shots are a CG effect, keyed in on Point Dume in Malibu, which is a National Park, so no such dwelling could even be built there. As for the interior of the home, that was all sound stage magic.
To read more about the setting and to take a video tour of the home, guided by Favreau, visit freshome.