07. Kensington Palace (9a), London – USD 70 million
House number 9a of Kensington Palace is also on the list of the most expensive real estate in the world. Owned by Indian-origin billionaire Lakshmi Mittal, it was renamed Taj Mittal as the uber-luxury house sourced the marble from the quarry supplier of the Taj Mahal. Kensington Palace (9a) is worth USD 70 million.
