Xanadu 2.0, $127 Million
Bill Gates owns Xanadu 2.0 in Seattle, Washington. Business Insider claims the cost of the property is $127 million. The 66,000,000-square-foot stunning residence includes a pool with an underwater music system, a 2,500-square-foot gym, 7 bedrooms, six kitchens, 24 bathrooms, a guest house, and a library.
15 Kensington Palace Gardens, $40.8 Million
The 15 Kensington Palace Gardens in London, United Kingdom, is owned by British Playboy model, Tamara Ecclestone. The property has 55 rooms, an Amazonian crystal bathtub, a private nightclub, a bowling alley, a subterranean swimming pool, a beauty salon, and dog spar, and a car lift. Mansion Global quoted the cost at $40.8 million.
