Miami Beach’s Fisher Island Topples Atherton as Priciest ZIP

Atherton is no longer the country’s king of high prices.

The nation’s most expensive ZIP code isn’t in the tony Bay Area enclave, but on Fisher Island in Miami Beach, the Silicon Valley Business Journal reported, citing PropertyShark’s 2025 ranking of the 100 priciest ZIP codes in the country.

Fisher Island’s 33109 ZIP code has outdone Atherton’s 94027 with a median sales price of $9.5 million, marking a 65 percent increase in home prices in the past year. The cheapest home sold on the island was more than $1.4 million, with the most expensive reaching nearly $23.7 million.

By contrast, Atherton’s 94027 ZIP had a median sales price of more than $8.3 million. The drop to second place marks the first time in the decade-long history of PropertyShark’s ranking that the country’s priciest ZIP code isn’t in California or New York. That doesn’t mean it’s doom and gloom in Atherton, though; it still set a record with a 5 percent increase from the past year. Sales prices in Atherton have ranged from $3.2 million to $51.5 million with a purchase by tech executive Stephen Luczo.

California isn’t short on pricey homes despite Atherton’s fall from first place. The Golden State holds 61 percent of the ZIP codes on PropertyShark’s priciest homes list. Of those, 32 were in the Bay Area, more than any other metro area in the country; still, that’s a drop from a pre-pandemic peak of 55 ZIPs.

In the top 10, two other communities besides Atherton made it into the top 10 of the country’s priciest ZIPs. Stinson Beach’s 94970 in Marin County saw a 38 percent year-over-year median price increase to $5.2 million, placing it at No. 7 and marking the first time it made it into the top 10. Closer to Atherton in the Peninsula, Los Altos’ 94022 came in at No. 9 with a $5.1 million median sales price — the first time the ZIP has crossed the $5 million median sales price threshold.

With 15 ZIPs in Santa Clara County on the list, including Los Altos, it’s the second-most-expensive county in the U.S. behind Los Angeles County. Other Bay Area municipalities with ZIP codes in the top 100 include San Francisco, Saratoga, Palo Alto, Sunnyvale, Stanford, Cupertino, San Carlos, San Mateo, Belmont, Danville, Alamo, Hillsborough, Greenbrae, Ross and Belvedere and Tiburon.

— Chris Malone Méndez