The world's most expensive house is in Mumbai. The 27-storey Antilia owned by the richest Indian, Mukesh Ambani, is a tower of opulence.

Antilia, Mumbai, India
Owner: Mukesh Ambani
Value: Over $1 billion

Take a look at the world's most expensive billionaire homes according to Forbes...

Villa Leopolda, Villefranche-sur-mer, France

Owner: Lily Safra

Price: $750 million in 2008

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Fair Field, Sagaponack, New York

Owner: Ira Rennert

Property value: $248 million

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Kensington Palace Gardens, London, U.K

Kensington Palace Gardens is a street in west central London, which houses some of the most expensive property in the world. Lakshmi Mittal owns three luxury houses in this street.

Owner: Lakshmi Mittal

Purchase Price: $222 million at the time in 2008

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One Hyde Park, London, U.K

Owner: Rinat Akhmetov

Sale Price: $221 million in 2011

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Ellison Estate, Woodside, California

Owner: Larry Ellison

Value: $200 million (Construction cost)

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Kensington Palace Gardens, London, U.K

Roman Abramovich owns several estates in London. He also owns a billionaire's row mansion.

Owner: Roman Abramovich

Purchase Price: $140 million in 2011

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Blossom Estate, Palm Beach, Florida

Owner: Ken Griffin

Total Price: $130 million in December 2012

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Xanadu 2.0, Seattle, Washington

Owner: Bill Gates

Market Value: $120.5 million in 2012

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Mountain Home Road, Woodside, California

Owner: Masayoshi Son (reportedly)

Purchase Price: $117.5 million in 2012

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Further Lane de Menil, East Hampton, New York

Owner: Ron Baron

Purchase Price: $103 million in 2007

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Silicon Valley Mansion, Los Altos Hills, California

Owner: Yuri Milner

Purchase Price: $100 million in 2011

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Broken O Ranch, Augusta, Montana

Owner: Stanley Kroenke

List Price: $132.5 million

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Kensington Palace Gardens, London, U.K

Owner: Tamara Ecclestone, daughter of Formula One billionaire Bernie Ecclestone

Purchase Price: Around $70 million in 2011

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15 Central Park West, New York

Owner: Daniel Loeb

Purchase Price: $45 million in 2008

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Maison de L'Amitie, Palm Beach, Florida

Owner: Dmitry Rybolovlev

Purchase Price in 2008: $95 million

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Promised Land, Montecito, California

Owner: Oprah Winfrey

Market Value: $88 million in 2012

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15 Central Park West, New York, New York

Owner: Ekaterina Rybolovleva, daughter of billionaire Dmitry Rybolovlev

Purchase Price: $88 million in 2012

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The Manor, Los Angeles, California

Buyer: Petra Ecclestone, daughter of billionaire Bernie Ecclestone

Sale Price: $85 million in 2011