We all know that once upon a time, Kings and rulers used to live in forts and palaces. At present, there is hardly any space left in urban areas to build such buildings. So in the new modern era, wealthy people have built very luxurious houses for themselves. Here are the details of top ten most expensive houses in the world.
 Buckingham Palace
This is the residence of the Queen of England Elizabeth II. There are 775 rooms including 188 staff rooms, 78 bathrooms, 52 bedrooms, 19 staterooms and 92 offices in this large palace. The gates at the boundary wall of the campus are very attractive and tall. National Building Society has valued the Buckingham Palace to be $1.5 billion.
Antilia is the residence of Mukesh Ambani who owns Reliance Group of Companies. This 27-story building is spread over an area of 400,000 square-feet and has 6 underground parking floors and 3 helicopter pads. The awesome building of richest man in India is valued at $1 billion and is maintained by a large staff of 600 people.
 Villa Leopolda
A Brazilian philanthropist named Lily Safra owns this large mansion that is spread over an area of 50 acres in Cote D’Azure, France. The mansion has a large greenhouse, a helipad, and Kitchen. It also has a guest house which is larger than many of the houses owned by millionaires. The mansion is valued at $750 billion.
 Four Fairfield Pond
This splendid building is spread over an area of 63 acres in Sagaponack, New York and is the residence of Ira Rennert who owns the Renco Group. The house is valued at $248.5 million which contains a 91-foot long dining room, 39 bathrooms, 29 bedrooms, sports courts, and a power plant.
 18-19 Kensington Palace Gardens
This luxurious house of steel king Lakshmi Mittal is located in London and is valued at $222 million. In this residential building, there are 12 bedrooms, Turkish bathrooms, one indoor pool, and a parking space sufficient enough to accommodate 20 cars.
 Ellison Estate
There are ten buildings on the campus of Ellison Estate that is spread in an area of 23 acres in Woodside, California. Larry Ellison, the co-founder of Oracle, owns this house whose value is $200 million. The campus has a man-made lake, a koi pond, a stylish tea house, and a bathhouse.
 Hearst Castle
Hearst Castle is a 27-bedroom castle located at San Simeon in California which is owned by William Randolph. The mansion got fame when it was featured in the film ‘The Godfather’. This is also a heritage and tourist site worth $191 million that is a part of California Park System.
 Seven The Pinnacle
This is the largest property in Yellowstone Club that is located in Big Sky of Montana. It is valued at $155 million whose owners are a Real estate developer and timber industrialist Tim Blixseth and Edra Blixseth. There are several pools, a gym, a ski lift, and a wine cell in the house.
 Kensington Palace
This is an extremely decorative building located in the Billionaires Row of London valued at $140 million. Roman Abramovich, a Russian billionaire and the owner of an investment firm called Millhouse LLC owns this building. Special features of the palace include an auto museum, a tennis court, and a health center.
 17 Upper Phillimore Gardens
This is a 10-bedroom mansion in London whose owner is the founder of ANTIAIDS Foundation and daughter of Ukraine’s second president, Leonid Kuchma. The mansion is valued at $128 million which contains an underground swimming pool, gym, sauna and a panic room. The interior of the building is covered with marble and gold and decorated with awesome artworks.