3. Antilia, Mumbai, India (400,000 square feet)

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This eye-opening 27-story high complex in Mumbai is owned by billionaire Mukesh Ambani. He and his family moved into the luxurious building in 2012. Named after the mythical island Antillia, Ambani’s high rise is regarded as the most expensive private residence in the world, costing somewhere between $1-2 billion to build.

The 500 feet tall building was constructed by two different design companies and is based on Vaast. This traditional style of Indian building means that no two floors are the same. The top six floors are residential areas where Ambani and his family live. The other floors contain a pool, spa, gym, a 50-seat theater, health center, temple, and even a snow room that produces real snow. Six of the floors are taken up by garages that can hold 168 cars while there are three helipads on the roof. 

Around 600 staff are required to maintain the home, although we are sure Ambani can afford these considering the size of his fortune. 

2. Buckingham Palace, London, England (828,820 square feet)

Queen Elizabeth’s regal home is over 300 years old and home to the royal family. It is the biggest house in all of the United Kingdom. Although not a private residence–it is owned by the Crown Estates–the Queen and her corgis still spend much of their time there so it deserves a spot on this list. 

Buckingham Palace has an incredible 775 rooms scattered throughout its five floors. There are 188 staff bedrooms, 92 offices, 78 bathrooms, 52 resident bedrooms, and 19 staterooms. In case the Queen has any important mail to send out there is a post office on the grounds, along with a jeweler’s workshop to fix her crown if her jewels come loose. There is also a cinema, swimming pool, and doctor’s surgery. Huge garden areas surround the Palace where the Queen often holds parties and official ceremonies.