Washington’s most affluent zip codes this year are all on King County’s Eastside, according to a study from PropertyShark.

The study was compiled by calculating median home sale prices based on closed transactions between Jan. 1, 2021, and Oct. 22, 2021, in each zip code.

Not only were Washington state’s median home values ranked across zip codes, but the expensiveness of homes were ranked in zip codes across the country.

The most affluent zip code in Washington, 98039, or Medina, not only has the most expensive median home sale value in the state with a median value of $4 million, but it also ranks as the tenth-most pricey zip code in the entire nation. According to the study, the median home value in this zip code has increased by 24% from the year before.

Behind Medina is Mercer Island, 98040, which ranks as the 82nd most expensive median home sale value in the U.S. with a median value of $1,795,000. At third place in the state, but not ranked within the top 100 of the nation, is Sammamish, 98075, with a median home sale value of $1,513,000.

At fourth place in the state is the Bellevue zip code, 98004, with a median home sale value of $1,498,000, followed by the Kirkland zip code, 98033, with a median home value of $1,305,000. Woodinville’s 98007 is tied at the same median home value.

Bellevue and Sammamish both had two zip codes ranked in the top 10 priciest in Washington.

According to the study, California accounts for 70% of the priciest housing markets, with 37% concentrated in the Bay Area alone. The most expensive in the country is in Atherton, California, with a median home value of $7,475,000, for reference.

As a testament to what has become an increasingly hot housing market, not just in our region but across the nation, PropertyShark said the country’s top 10 most expensive zip codes all surpass $4 million for the first time ever, and 30 of the 100 priciest zip codes in the country feature medians higher than $3 million, more than double the areas in 2020.