Take a look at this. It’s the world’s most expensive house, boasting more than 400,000 square feet. It’s the new home of India's richest man. But it's raising eyebrows in country with a wide gap between the rich and the poor.

India's richest man, billionaire tycoon Mukesh Ambani, is building the world’s most expensive home… costing over a billion dollars. It is located in Mumbai, a city where more than one third of the residents live in poverty.

The building, named Antilia, after a mythical island, is spread over 400,000 square feet on 27 floors. Ambani, his wife, his three children and his mother, along with a full-time staff of about 600 will live there.

But some feel uneasy as the widening economic gap between the rich and the poor could lead to social unrest.

[S. Parasuraman, Director, Tata Institute of Social Sciences]:
"In a country where a large proportion of people who are poor and vulnerable and where a large number of them are losing access to lands and livelihoods, it is a serious problem. I think it is not about Mr. Ambani, it is about the nature of economic growth that is being attempted at this particular point in time and that creates discontent and that creates enormous implications to the country actually."

53-year-old Ambani is the world’s fourth richest person with a net worth of $29-billion. He made his money from petroleum and petrochemical giant Reliance Industries.

Some residents wish Ambani would use his wealth to help the poor.

[Lalita, Resident]:
"With the same money, if he had done something for the poor, like distributing food, or providing housing to the poor, he would have got so many blessings."