Mukesh Ambani, the fifth richest man in the world, is building the most expensive single family residence ever, a $2 billion -- yes, BILLION -- 27-story skyscraper in downtown Mumbai.
Atop six stories of parking lots, Antilla's living quarters begin at a lobby with nine elevators, as well as several storage rooms and lounges. Down dual stairways with silver-covered railings is a large ballroom with 80% of its ceiling covered in crystal chandeliers. It features a retractable showcase for pieces of art, a mount of LCD monitors and embedded speakers, as well as stages for entertainment. The hall opens to an indoor/outdoor bar, green rooms, powder rooms and allows access to a nearby "entourage room" for security guards and assistants to relax.
Photos here. In fairness, the place sounds like a combination corporate HQ with an incorporated family living space, but still. Not noted in the article is the expensive laboratory-grade scanning electron microscope that Ambani uses to locate his teensy penis, for which the 27-story house is compensation.