most expensive house in the world

The most expensive house in the world in 2025 is Buckingham Palace in London, UK, valued at $4.9 billion. It is the official residence and headquarters of the British monarch, featuring 775 rooms, 78 bathrooms, a 40-acre garden, and tunnels. Following Buckingham Palace, the second most expensive house is Antilia in Mumbai, India, worth $2 billion, known for its 27 floors, spa, helipads, and earthquake-proof design.