MUMBAI, INDIA (GaeaTimes.com) -- The richest man in India, Mukesh Ambani is soon to welcome his relatives and friends to have a look to his lavish new house that is marked as the most expensive house built ever in history. The chairman of India's largest private sector, Reliance Industries Mr. Ambani's new building is located in Mumbai and it took almost seven years to complete such a luxurious building that will accommodate only six people. The house estimated to cost around $1 billion.