37 Bay Area ZIP Codes Among Nation's Priciest In 2023

SAN FRANCISCO — More than three dozen Bay Area ZIP codes were among the most expensive in the country this year, despite declines in median sale prices in many areas this year.

To determine the nation's 100 most expensive ZIP codes, real estate data firm PropertyShark considered all home transactions that closed between early January and late October.

PropertyShark said it "calculated median sale prices based on closed home sales, not asking prices, as we consider this methodology to provide the most accurate picture of actual market dynamics. Whereas asking prices reflect sellers' wishes, calculating medians based on sale prices reflects the transactional reality on the ground."

California claimed 79 of the most expensive ZIP codes in the country — the most of any state.

Despite nine ZIP codes dropping off the list this year, the Bay Area accounted for nearly half of that total. Atherton's 94027 ZIP code kept its long-running crown as the nation's costliest, where the median sale price ballooned to $8.3 million this year. Marin County also landed in the top 10, where Stinson Beach's 94970 ZIP code tied for sixth place with a $4.5 million median sale price —a 27 percent leap from the year before.

By contrast, more than half of the nation's most expensive ZIP codes saw price declines in 2023, led by Marin County's 94957 ZIP code in Ross where they plummeted by a nation-leading 39 percent, falling from third place last year to 21st this year. Researchers pointed to a notable decrease in the square footage of the homes that changed hands this year as a potential factor.

According to PropertyShark, Santa Clara County had the highest concentration of Bay Area ZIP codes in the top 100, logging 16 spots on the list. San Mateo County nabbed eight spots, followed by Marin County with six, Contra Costa County with four, and San Francisco with three. Alameda County dropped out of the top 100 after claiming three ZIP codes last year.

Here are the Bay Area ZIP codes that ranked among the 100 priciest for homes in 2023:

• #1: Atherton - 94027 - San Mateo County
• #6: Stinson Beach - 94970 - Marin County
• #12: Los Altos - 94024 - Santa Clara County
• #13: Los Altos - 94022 - Santa Clara County
• #15: Portola Valley - 94028 - San Mateo County
• #16: Saratoga - 95070 - Santa Clara County
• #19: Palo Alto - 94301 - Santa Clara County
• #21: Ross - 94957 - Marin County
• #22*: Belvedere Tiburon - 94920 - Marin County
• #22*: Hillsborough/Burlingame - 94010 - San Mateo County
• #23: Los Gatos - 95030 - Santa Clara County
• #36: Cupertino - 95014 - Santa Clara County
• #37: Palo Alto - 94306 - Santa Clara County
• #38: Menlo Park - 94025 - San Mateo County
• #42: Diablo - 94528 - Contra Costa County
• #43: Alamo - 94507 - Contra Costa County
• #47: Redwood City - 94062 - San Mateo County
• #50: Mountain View - 94040 - Santa Clara County
• #52: Sunnyvale - 94087 - Santa Clara County
• #55: Larkspur - 94939 - Marin County
• #62: San Mateo - 94402 - San Mateo County
• #63: San Francisco - 94123
• #70: Danville - 94506 - Contra Costa County
• #74: Mountain View - 94041 - Santa Clara County
• #75: Los Gatos - 95032 - Santa Clara County
• #76: Mill Valley - 94941 - Marin County
• #77: San Jose - 95120 - Santa Clara County
• #79*: Belmont - 94002 - San Mateo County
• #79*: San Carlos - 94070 - San Mateo County
• #83: San Jose - 95129 - Santa Clara County
• #89: Palo Alto - 94303 - Santa Clara County
• #90*: San Francisco - 94118
• #90*: Palo Alto - 94305 - Santa Clara County
• #91: Greenbrae - 94904 - Marin County
• #96: Orinda - 94563 - Contra Costa County
• #99: San Jose - 95130 - Santa Clara County
• #100: San Francisco - 94127

>> The full "100 Most Expensive U.S. Zip Codes in 2023" report can be found here.