Ambani's Antilia most expensive billionaire home

Reliance Industries Chairman Mukesh Ambani's skyscraper residence in Mumbai is the most expensive billionaire home in the world, according to a Forbes list which also includes Indian-origin steel tycoon Lakshmi Mittal's houses in London.

Ambani's 27-story, 400,000-square-foot skyscraper home Antilia named after a mythical island in the Atlantic, tops the Forbes list of the most expensive homes in the world.

"The title of the most outrageously expensive property in the world still belongs to Mukesh Ambani's Antilia in Mumbai," Forbes said adding it is the world's most expensive home "far and away" with construction costs reported between a range of $1 billion to $2 billion.

The house has six stories of underground parking, three helicopter pads, and reportedly requires a staff of 600 to keep it running.

Putting Antilia's scale and cost into perspective, Forbes compared it to '7 World Trade Center', a 52-story tower that stands near Ground Zero in Manhattan with 1.7 million square feet of office space that was reportedly built for $2 billion.

Mittal's houses in London's KensingtonPalaceGardens occupy the 5th and the 18th spot on the list of the 21 most expensive billionaire homes in the world.

The steel magnate is believed to own three homes on the high-security street known as 'Billionaires Row', including a neo-Georgian mansion near the Israeli embassy.

Let’s take a look at the most expensive billionaire’s homes.

…

Antilia

Rank: 1

Location: Mumbai

Country: India

Owner: Mukesh Ambani

Owner’s net worth: $23.9 billion

Value: Upward of $1 billion

…

Villa Leopolda

Rank: 2

Location: Villefranche-sur-mer

Country: France

Owner: Lily Safra

Owner’s net worth: $1.3 billion

Purchase Price: 500 million euro ($750 million at the time) in 2008

…

Fair Field

Rank: 3

Location: Sagaponack, N.Y.

Country: US

Owner: Ira Rennert

Owner’s net worth: $6 billion

Property value: About $248.5 million, according to 2014 tentative tax assessment

…

One Hyde Park

Rank: 4

Location: London

Country: UK

Owner: Unknown

Owner’s net worth: Unknown

Sale Price: $237 million in May 2014

…

Kensington Palace Gardens

Rank: 5

Location: London

Country: U.K.

Owner: Lakshmi Mittal

Owner’s net worth: $16.6 billion

Purchase Price: 117 million pound ($222 million at the time) in 2008

…

One Hyde Park

Rank: 6

Location: London

Country: U.K.

Owner: Rinat Ahkmetov

Owner’s net worth: $11.8 billion

Sale Price: $221 million in 2011

…

Ellison Estate

Rank: 7

Location: Woodside, Calif.

Country: US

Owner: Larry Ellison

Owner’s net worth: $51.4 billion

Value: estimated $200 million to construct

…

Kensington Palace Gardens

Rank: 8

Location: London

Country: UK

Owner: Roman Abramovich

Owner’s net worth: $9.4 billion

Purchase Price: 90 million pounds (about $140 million) in 2011

…

Blossom Estate

Rank: 9

Location: Palm Beach, Fla.

Country: US

Owner: Ken Griffin

Owner’s net worth: $5.2 billion

Total Purchase Price: Nearly $130 million in December 2012

…

Xanadu 2.0

Rank: 10

Location: Seattle, Wash.

Country: US

Owner: Bill Gates

Owner’s net worth: $77.5 billion

Market Value: $120.5 million, 2014 tax assessment

…

Copper Beech Farm

Rank: 11

Location: Greenwich, Conn.

Country: UK

Owner: Unknown

Owner’s net worth: Unknown

Sale Price: $120 million in April 2014

…

Mountain Home Road

Rank: 12

Location: Woodside, Calif.

Country: US

Owner: Masayoshi Son

Owner’s net worth: $17.3 billion

Purchase Price: $117.5 million in 2012

…

Further Lane de Menil

Rank: 13

Location: East Hampton, NY

Country: US

Owner: Ron Baron

Owner’s net worth: $1.9 billion

Purchase Price: $103 million in 2007

…

Fleur de Lys

Rank: 14

Location: Holmby Hills, Calif.

Country: US

Owner: Unknown

Owner’s net worth: Unknown

Purchase Price: $102 million in March 2014

…

Silicon Valley Mansion

Rank: 15

Location: Los Altos Hills, Calif.

Country: US

Owner: Yuri Milner

Owner’s net worth: $1.7 billion

Purchase Price: $100 million in 2011

…

Maison de L'Amitie

Rank: 16

Location: Palm Beach, Fla.

Country: US

Owner: Dmitry Rybolovlev

Owner’s net worth: $8.8 billion

Purchase Price: $95 million in 2008

…

Broken O Ranch

Rank: 16 (tie)

Location: Augusta, Mont.

Country: US

Owner: Stanley Kroenke

Owner’s net worth: $5.6 billion

List Price: $132.5 million

Purchase Price: Uncomfirmed; Estimated between $90 million and $132.5 million

…

Promised Land

Rank: 17

Location: Montecito, Calif.

Country: US

Owner: Oprah Winfrey

Owner’s net worth: $2.9 billion

Market Value: $90.3 million, according to 2014 tax assessment

…

Kensington Palace Gardens

Rank: 18

Location: London

Country: UK

Owner: Lakshmi Mittal (2nd property)

Owner’s net worth: $16.6 billion

Purchse Price: £57 million in 2004 (nearly $90 million)

…

One57

Rank: 19

Location: New York, NY

Country: US

Owners: Bill Ackman (led investors to purchase one penthouse; the other buyer remains unknown)

Owner’s net worth: $1.5 billion

Purchas Price: more than $90 million apiece in 2012

…

15 Central Park West Penthouse

Rank: 20

Location: New York, NY

Country: US

Owner: Ekaterina Rybolovleva, daughter of Russian billionaire Dmitriy Rybolovlev

Owner’s net worth: $8.8 billion

Sale Price: $88 million in February 2012