As per Forbes, the most expensive house in the world in 2024 is Buckingham Palace, the royal residence in London, valued at $4.9 billion. It is followed by Mukesh Ambani-owned Antilia in Mumbai, which is valued at $2 billion. Villa Leopolda in France comes third at $750 million. Beyoncé & Jay-Z's Malibu mansion ($200 million) also features in top 10.