India's Richest Man Moves Into World's Biggest House Brian Moylan · 10/14/10 10:48AM Indian tycoon Mukesh Ambani is about to move into his new house, the world's largest: a 27-story skyscraper in Mumbai. It has three helipads, a parking garage and 600 staff members. It's worth £630 million, or about $9 bajillion.