The 10 Most expensive houses in the world, their worth, and who owns them (+Photos)

5. 18-19 Kensington Palace Gardens

Location: London
Value: $222 million

Details: Another property on Billionaires Row, 18-19 sits alongside the home of Prince William and Kate Middleton. This particular residence has 12 bedrooms, Turkish baths, an indoor pool, and parking for 20 cars.
Owner: Lakshmi Mittal—The head of Arcelor Mittal, the world’s largest steel manufacturer, and, according to Forbes, one of the 100 richest men in India.