World’s 5th Richest Man Builds The World’s First Billion-Dollar Home

Like many obscenely wealthy families with the means and ego to do so, the Ambani's wanted to build a custom skyscraper for their personal residence. With the pricey help of architecture firms Perkins + Will and Hirsch Bedner Associates, the design giants behind the Mandarin Oriental Hotels, Mukesh and his wife, Nita, known as "Empress of India", began drawing up plans to build the world's largest and most expensive home: a 27-story skyscraper in downtown Mumbai with a projected cost of a mere $2 billion.

The Ambani home, called Antilla, differs in that no two floors are alike in either plans or materials used. Antilla's shape is based on Vaastu, an Indian tradition much like Feng Shui that is said to move energy beneficially through the building by strategically placing materials, rooms and objects. [Forbes]

Some of the specs:

• Rooftop helicopter pad
• Six stories of parking lots
• Nine elevators
• Dual stairways with silver-covered railings
• Large ballroom with 80% of its ceiling covered in crystal chandeliers
• Ballroom features a retractable showcase for pieces of art, a mount of LCD monitors and embedded speakers, as well as stages for entertainment
• Indoor/outdoor bar
• Green rooms
• Powder rooms
• "Entourage room" for security guards and assistants to relax
• Movie theater
• Wine room
• Custom sinks shaped like ginkgo leaves
• Swimming pool 
• Yoga studio
• an "Ice Room" where residents and guests can escape the Mumbai heat to a small, cooled chamber dusted by man-made snow flurries
• a four-story open garden