The biggest house in the world is Antilia, located in Mumbai, India, and owned by Mukesh Ambani, chairman of Reliance Industries. Antilia is a 27-story private skyscraper residence containing approximately 400,000 square feet of living space, with features including three helipads, a snow room, a ballroom, nine elevators, a spa, a temple, and a garage capable of storing over 150 cars[2].
While Buckingham Palace in London is larger in total area and is the most expensive residence in the world, it is a royal palace and official government property, not a privately-owned house. Antilia, by contrast, remains the largest privately owned house in the world as of 2025[1][2][5].
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