PropertyShark’s newly released ranking of the most expensive ZIP codes draws on closed sales data to chart the evolution of U.S. real estate and wealth.
To arrive at its ranking, the nationwide real estate data provider measured median sale prices of the top 100 high-end transactions that truly closed, rather than where sellers asked the highest prices. This is a crucial distinction, it said in a statement, as the map of luxury housing shifted once again this year.
To determine the most expensive ZIP codes in the United States in 2025, PropertyShark researchers looked at registered residential transactions closed between Jan. 1 and Sept. 30 in disclosure states. They excluded non-disclosure states (including Montana, Texas, Utah and Wyoming) because of lack of closed-sales data.
The researchers took into account condo, co-op and single- and two-family home sales, but excluded all multi-parcel deals. For an accurate representation, they considered only ZIP codes that registered a minimum of five residential transactions.
They based year-over-year comparisons on median sale prices determined for PropertyShark’s 2024 report, which took into account condo, co-op, and single- and two-family home sales recorded between Jan. 1 and Sept. 30 that year.
See the accompanying gallery for the 10 most expensive ZIP codes in 2025.
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