The largest areas with the most expensive houses in America are in prime locations such as Beverly Hills and Bel-Air in California, Palm Beach in Florida and New York City including the Hamptons. These destinations are exclusive, scenic and they are close to entertainment and business centers. These areas are the best places to invest in luxury real estate and develop high-value properties due to the ease of access to the coasts, the good climates, and the high demand among affluent buyers.