11 of America’s 25 most expensive zip codes are in the Bay Area. Here’s where

Zillow estimated the value of this Atherton home at $8,249,232 in March 2019. (Randy Vazquez/Bay Area News Group)

The Bay Area maintains its status as the most expensive metropolitan area in the U.S.

Bay Area zip codes made up 37 of the top 100 most expensive zip codes in the country, according to a new 2023 ranking by real estate data firm PropertyShark that looked at median sales prices.

Unsurprisingly, Atherton’s 94027 ranked at the top of the list for the seventh year in a row, with an eye-popping median sales price of $8.3 million, an increase of 5% from last year’s $7.9 million. The city, just five square miles, is a hamlet for tech industry power players, as well as celebrities, including billionaire venture capitalist Marc Andreessen and Golden State Warriors star Stephen Curry.

Several Bay Area zip codes dropped in the rankings. Last year, the Bay Area had a record 46 zip codes in the top 100. San Francisco only had three zip codes in the top 100 in 2023, a drop from the 13 it recorded in 2019.

The Bay Area’s hottest county was Santa Clara, with 16 zip codes in the top 100. It was followed by San Mateo (eight), Marin (six), Contra Costa (four) and San Francisco (three) counties. But Alameda County, previously with three zip codes among the country’s most expensive, did not make it into the top 100 this year.

Across the nine-county Bay Area, median home prices are up 6.6% from last year, reaching $1.3 million in September, according to data from the California Association of Realtors.

The Bay Area zip codes ranking in the top 25 include:

• 94027 in Atherton at No. 1 ($8.3 million)
• 94970 in Stinson Beach at No. 6 ($4.5 million)
• 94024 in Los Altos at No. 12 ($4 million)
• 94022 in Los Altos Hills at No. 13 ($3.99 million)
• 94028 in Portola Valley at No. 115 ($3.8 million)
• 95070 in Saratoga at No. 16 ($3.7 million)
• 94301 in Palo Alto at No. 19 ($3.5 million)
• 94957 in Ross at No. 21 ($3.4 million)
• 94920 in Belvedere Tiburon at No. 22 ($3.2 million)
• 94010 in Hillsborough at No. 22 ($3.2 million)
• 95030 in Los Gatos at No. 23 ($3.13 million)

Other top zip codes included 11962 in Sagaponack, New York, in the Hamptons at No. 2 ($8.1 million) and 33109 in Miami Beach, Florida, at No. 3 ($5.5 million).

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