Mukesh Ambani, the fifth richest man in the world and head of the Mumbai based petrochemical giant Reliance Industries is estimated to be worth somewhere in the region of $43 billion. He is also the owner to-be of a 27-story skyscraper in downtown Mumbai that is to cost him colossal $2 billion! His wife Nita Ambani was staying in the Mandarin Oriental in New York and was so impressed with the interior Asian style decor that she wanted something similar for her to live in. What resulted from that is the world's largest and most expensive home ever. Every story in the Antilla's skyscraper home will be built to a different specification. The vast variation of materials to be used in its build has tremendously added to its overall cost. The meticulous planning that has gone into this architectural design is astounding and once the 27 -story tower is built it will certainly become a spectacular site for all eyes. Hirsch Bedner Associates are the designers behind this project.