Location: London
Value: $1.55 billion
Details: Technically still a house, but certainly not for sale, the Queen’s residence was valued at roughly $1.5 billion by the Nationwide Building Society in 2012. The property holds 775 rooms, including 19 state rooms, 52 bedrooms, 188 staff rooms, 92 offices, and 78 bathrooms.
Owner: The British Sovereign—Currently Queen Elizabeth II, who has ruled since February 6, 1952.
2. Antilia
Location: Mumbai, India
Value: $1 billion
Details: The Antilia isn’t even really a home in the traditional sense. This 27-story, 400,000-square-foot building has six underground parking floors, three helicopter pads, and requires a 600-person staff just to maintain it.
Owner: Mukesh Ambani—India’s richest man, with a net worth of $23.6 billion, according to Forbes. Ambani made his money running Reliance Industries, an energy and materials company.
3. Villa Leopolda
Location: Cote D’Azure, France
Value: $750 million
Details: This 50-acre estate includes “a commercial sized green house, a swimming pool and pool house, an outdoor kitchen, helipad, and a guest house larger than the mansions of most millionaires,” according to Variety. The house was famously used as a set in the 1955 Hitchcock classic To Catch a Thief.
Owner: Lily Safra—A Brazilian philanthropist and widow of Lebanese banker William Safra. Her husband died when another one of the couple’s homes burned down, apparently due to arson.
4. Four Fairfield Pond
Location: Sagaponack, New York
Value: $248.5 million
Details: This 29-bedroom home sits on 63 acres and has its own power plant. Inside, there are 39 bathrooms, a basketball court, bowling alley, squash courts, tennis courts, three swimming pools, and a 91-foot long dining room.
Owner: Ira Rennert—Owner the Renco Group, a holding company with investments in auto manufacturing and smelting. He also has holdings in metals and mining.
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.
Source : time.com