Diablo, Alamo Ranked As Some Of Nation's Priciest Zip Codes

DIABLO, CA — More than half of the country's most expensive zip codes are in the Bay Area, and two Tri-Valley communities are ranked inside the top 55, according to a study released Monday on www.propertyshark.com.

Zip code 94027, in Atherton, topped the charts for the third year in a row with a median home sale price of more than $7 million.

San Francisco, where 13 of the country's priciest zip codes exist, is the most expensive city in the U.S. The number of pricey zip codes in San Francisco has risen steeply in recent years, from seven in 2016 to nine in 2018.

In total, 55 of the top 100 most expensive zip codes fell somewhere in the Bay Area. Besides San Francisco, others appeared in San Mateo, Santa Clara, Marin and Alameda counties — although no Tri-Valley zip code in the latter county fell inside the top 100.

However, zip codes in Contra Costa County's Diablo (94528) and Alamo (94507) did. The two census-designated places ranked 33 and 54, respectively. According to Property Shark, Diablo's 2019 median home sale price is $2,187,000; Alamo's is $1,780,000.

The full list is available online, along with information about the methodology used to conduct the study, at https://bit.ly/2Os67MC.

—Bay City News contributed to this report.