RIL Chairman Mukesh Ambani''s skyscraper residence in Mumbai is the most expensive billionaire home in the world, according to a Forbes list.The title of the most outrageously expensive property in the world still belongs to Mukesh Ambani’s Antilia in Mumbai, India. The 27-story, 400,000-square-foot skyscraper home–which is named after a mythical island in the Atlantic–includes six stories of underground parking, three helicopter pads, and reportedly requires a staff of 600 to keep it running. Construction costs for Antilia have been reported at a range of $1 billion to $2 billion. To put that into perspective, 7 World Trade Center, the 52-story tower that stands just north of Ground Zero in Manhattan with 1.7 million square feet of office space, cost a reported $2 billion to build.
In second place is Lily Safra’s Villa Leopolda, in Villefranche-sur-mer, France. The estate is reportedly one of several waterside homes that King Leopold II of Belgium built for his many mistresses. Set on 20 acres, the massive home was valued at 500 million euros ($750 million at the time), when Russian billionaire Mikhail Prokhorov tried to buy it in 2008. Prokhorov eventually backed out of deal, losing his 50 million euro deposit.
The third-most expensive billionaire home–and the most expensive in the United States is Fair Field, Ira Rennert’s Sagaponack, N.Y., enclave. Although Rennert built the property and it has never traded hands, the local assessor’s office peg its value at about $248.5 million in its latest (2014) tentative tax assessment.
