Atherton Reclaims Crown as the Nation’s Most Expensive Zip Code

When you hear the phrase “the most expensive place to buy a house,” you probably picture a sun‑kissed enclave with sprawling estates and a price tag that makes most of us wince. In 2026, that picture fits perfectly with Atherton, California – a tiny town tucked in the heart of the Bay Area that just reclaimed the top slot on PropertyShark’s annual zip‑code ranking.

According to the data, the median selling price for a single‑family home in Atherton’s 94027 zip code hit $10,725,000. Yes, you read that right – just over ten million bucks for the middle sale of the year. The figure isn’t an asking price; it’s what buyers actually paid, based on closing sale records compiled throughout 2026. That little nuance matters because it strips away the hype of inflated listings and shows the true market bite.

What’s interesting is that this is the first time a zip code has broken the eight‑figure barrier in the median sense. PropertyShark noted, “For the first time ever, one zip code broke into eight‑figure territory.” And, as usual, the heavy hitters are all near the coast. Of the 122 zip codes that tied for the top 100 slots, a solid 72 sit within five miles of an ocean or bay.

Trailing Atherton is Sagaponack, New York (11962), whose median price sits at $7,350,000 – a respectable runner‑up but still a full $3.4 million shy of the Bay Area gem. The only other Bay Area community cracking the top ten is Los Altos (94022), with a median of $4,875,000, landing it in the ninth spot.

Here’s a quick look at the top ten most expensive zip codes for 2026:

1. Atherton, CA — 94027 – $10,725,000
2. Sagaponack, NY — 11962 – $7,350,000
3. Miami Beach, FL — 33109 – $7,217,000
4. Bridgehampton, NY — 11932 – $6,150,000
5. Newport Beach, CA — 92657 – $6,100,000
6. Newport Beach, CA — 92661 – $5,770,000
7. Water Mill, NY — 11976 – $5,750,000
8. Beverly Hills, CA — 90210 – $5,390,000
9. Santa Barbara, CA — 93108 – $5,295,000
10. Los Altos, CA — 94022 – $4,875,000

All told, the list underscores a familiar pattern: proximity to water, upscale amenities, and a dash of exclusivity keep driving home values through the roof. For anyone eyeing a Bay Area purchase, Atherton now serves as both a benchmark and a reminder of just how steep the market can climb.