Antilla- Mumbai, India. This 27 story building, which goes for $1 billion, is owned by a petro-chemical giant- Mukesh Mumbai. It is the most expensive home in history, believe it or not! The house has 400,000 square foot of interior living space, a 50-seat cinema, six floors of parking, and three helipads. Despite having this unbelievable and fantastic house, questions have been raised on whether Ambani has a family or he is just reluctant to live in Antilla. He also has to deal with criticism from the locals, who term the beautiful house as an animated display of wealth in a country where most people live below $2 a day.