Most expensive house built

The most expensive private house in the world is Antilia, a 27-storey personal skyscraper and home of Indian businessman Mukesh Ambani in Mumbai. Designed by American architects Perkins & Will and completed in 2010, Antilia has a total living floor area of 37,000 m² (400,000 ft²), plus 168 parking spaces, three helipads, several swimming pools, a health spa and theatre. It occupies a 4,532-square-metre (48,780-ft²) plot on Mumbai's exclusive Altamount Road, and accommodates 600 staff. Measuring 173 m (568 ft) high, the generous triple-height spacing of the 27 floors means that the building is as tall as a typical 60-storey office tower. Exact expenditure is unclear, and at one point was officially estimated at $500–700 million, but very probably Antilia eventually cost close to $2 billon. Much of this comes from land, size and construction expenditure, but also from using different marbles, stones and exotic woods, plus bespoke furniture and fittings, on every floor. The building is named after the mythical Atlantic island of Antillia, and the design uses anicent Vaastu Shastra architectural principles to maximize positive energy.