Not New York, nor LA: this is the place in the United States with the most expensive zip code

For the first time in its history, Fisher Island, a private enclave off Miami Beach, is set to become the most expensive postcode in the United States in 2025. According to the latest PropertyShark ranking, postcode 33109 recorded a median home sale price of 9.5 million dollars, a remarkable 65 percent increase on the previous year.

What makes Fisher Island so exclusive?

Restricted access: The island is reachable only by ferry, yacht or helicopter, creating a kind of private oasis within the Miami metropolitan area.

Low population density: With only a few hundred residents, Fisher Island emphasises luxury, privacy and tranquillity, well removed from the intensity of the city.

Extraordinary properties: In 2025, even the least expensive sale exceeded one million dollars, while the highest reached 23.7 million dollars. As an analysis cited by the media notes, “the cheapest home on Fisher Island sold for 1.4 million dollars, while the most expensive reached 23.7 million dollars.”

A shift in the geography of luxury: goodbye California

This trend marks a historic shift. For years, Californian cities and, to a lesser extent, parts of New York dominated the rankings of the country’s priciest postcodes. The Californian enclave of Atherton (postcode 94027), known for its mansions and prominent Silicon Valley residents, held the top position for eight consecutive years. In 2025, it slipped to second place with a median home value of 8.3 million dollars.

Third place now belongs to postcode 11962 in Sagaponack, New York, in the Hamptons, with a median price of almost 5.9 million dollars. This reordering confirms South Florida, and particularly Miami and Fisher Island, as the new epicentre of American luxury real estate in 2025.

Why Fisher Island has risen to the top

Several factors have converged to place Fisher Island at the summit:

• A shift in luxury investment towards Florida, driven by economic, tax and lifestyle considerations.
• Persistent demand for beachfront properties with exclusive amenities and complete privacy, a trend strengthened in the post-pandemic era.
• Limited housing supply in ultra-high-standard areas such as Fisher Island, which pushes prices upwards and produces sudden jumps in median sale values.

Doug Ressler of Yardi Matrix, a company associated with PropertyShark, cautions that although many coastal areas face growing climate risks, “that threat is not yet fully reflected in the prices” of these enclaves.

Fisher Island is not just a statistical anomaly. It embodies a new order in the United States’ elite property market. In 2025, the private enclave of 33109 secured the country’s most coveted real estate distinction: the place where it costs the most to live. On the luxury map, the East Coast, and South Florida in particular, no longer looks to California with envy, but stands confidently on its own.

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