(FILES) In this picture taken on July 4,

(FILES) In this picture taken on July 4, 2007, Indian labourers work on the under construction home of Reliance Industries Head Mukesh Ambani in the Malabar Hills District of Mumbai. The 27-storey skyscraper being built in the western Indian city by Mukesh Ambani, the richest person in India, could be the world's largest and costliest home with a price- tag nearing two billion dollar, according to Forbes magazine. "When the Ambani residence is finished in January, completing a four-year process, it will be 550 feet high with 4,00,000 square feet of interior space," Forbes said in a report on its website. AFP PHOTO/Pal PILLAI/FILES (Photo credit should read PAL PILLAI/AFP via Getty Images)