The largest building in the world by volume is the Boeing factory in Everett, Washington (pictured above) with a floor area of 4.3 million square feet and volume of 472 million cubic feet because, airplanes.
($2 billion is a 27-storied,and with amenities such as three helipads, a 168-car garage, a ballroom, terrace gardens, spa, and a temple, the skyscraper-mansion is one of India's largest and most elaborated private homes.