World’s First Billion-Dollar Home

Architecture firms Perkins + Will and Hirsch Bedner Associates based in Dallas and Los Angeles designed this 27-story skyscraper in downtown Mumbai with a cost nearing USD2 billion. The architects and designers create as they go, altering floor plans, design elements and concepts as the building is constructed.
Owned by  Mukesh Ambani, head of Mumbai, India-based petrochemical giant Reliance Industries, and the fifth richest man in the world. The home will cost more than a hotel or high-rise of similar size because of its custom measurements and fittings. The Ambani home, called Antilla has no two floors 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.

Extract from Forbes