Los Angeles County is home to the largest number of expensive markets in the country. A new survey from Yardi's Property Shark analyzed the most expensive zip codes in terms of residential transactions, and ranked the top 100. Los Angeles had 23 zip codes on the list, the highest concentration of any individual market.

"Los Angeles County has traditionally had a larger presence on this ranking than other counties—even New York—due to the area's long-term desirability, especially among high-income buyers, its economic power and the types of industries it relies on and continues to attract, and its ongoing housing shortage. This combination of factors continues to intensify, leading to a faster-paced price growth than other areas of the country," Eliza Theiss of Property Shark, tells GlobeSt.com.

Despite the pandemic, Los Angeles County continued to see a high cost of housing. Los Angeles even added two additional zip codes this year compared to last year's survey. "Much of L.A. County's median sale price growth during 2020 was fueled by a shift in the type of properties traded," says Theiss. "Specifically, demand for single-family homes declined less sharp rate this year than demand for condos—that shift in the mix of properties sold paired the higher price point traditionally commanded by single-family had a noticeable impact in increasing the county's presence among the country's most expensive zips." Those include 90402 and 90210, which have a median home price of $3.75 million, ranking the two markets third in the country.