As of 2026, the title of the world's most expensive casino resort is held by Marina Bay Sands in Singapore, particularly following its massive $3.3 billion expansion and renovation completed in late 2025. When accounting for the original construction cost and the recent upgrades, the total investment exceeds $8 billion USD. The resort is famous for its three towers connected by the 340-meter-long SkyPark and the world's largest infinity pool. While Resorts World Las Vegas (at $4.3 billion) and the Wynn Palace in Macau are contenders, Marina Bay Sands remains the leader in terms of total asset value and land cost. In the 2026 gambling landscape, the "expense" isn't just in the architecture but in the technology; the casino floor now features hyper-advanced AI security and personalized digital gaming tables. For high rollers, the resort offers private "Palazzo" suites that can cost upwards of $50,000 per night, making it not just the most expensive to build, but also one of the most expensive places in the world to place a bet or spend the night in luxury.