The Antila is a private home located in Mumbai, India. Express places its construction cost at approximately $2.14bn. First Post calls the real estate prices in Mumbai “steady”, citing the costs and complications of the 60 building approvals necessary to begin construction in the area. Express names the Antila the world’s most expensive private home, while Business Insider calls it “the first billion-dollar home.” With 27 floors, and 400,000 sq ft of space, it took four years to build. Residing in the Antila are Nita Ambani, Mukesh Ambani and their three children. Forbes names Mukesh Ambani the fifth richest man in the world, placing his net worth at $43bn. They consulted with two architecture firms in order to design and build their custom home: Hirsch Bedner Associates, and Perkins + Will.