San Mateo County
Atherton Housing Market & Neighborhood Guide
America's most expensive zip code — gated estates, billion-dollar neighbors, and absolute privacy.
Median
$8.6M
Inventory
Highly limited
Schools
10 / 10
Atherton is its own market. Most transactions happen off-market through a small network of agents and trusted relationships. Average lot sizes exceed one acre. Discretion, preparation, and proven buyer relationships matter far more than volume marketing.
What sets it apart
- West Atherton and Lindenwood command the highest absolute pricing
- Off-market activity accounts for the majority of true luxury transactions
- Adjacent to Sacred Heart, Menlo, and Castilleja school networks
Market note
Median sale price up 11.3% YoY. Average days on market for listed inventory: 42. True transaction velocity is significantly higher when off-market activity is included.
Market snapshot
Atherton at a glance
- Approx. single-family median (2025–2026)
- $8M – $10M+
- Typical days on market (listed inventory)
- 35–60 days
- Minimum lot size
- 1 acre in most Atherton zoning districts
- Property tax base rate
- 1% + local assessments (Prop 13)
ZIP codes: 94027
Schools
Public schools serving Atherton
Menlo-Atherton High School · 9–12
Sequoia Union High School District (SUHSD)
Encinal and Selby Lane Elementary · K–8
Menlo Park City and Redwood City districts — attendance is address-based
Sacred Heart Schools, Atherton · K–12
Independent school located in Atherton
Menlo School and Castilleja · 6–12
Independent schools in adjacent Atherton and Palo Alto
Frequently asked
About Atherton real estate
Why do so many Atherton homes sell off-market?
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Privacy. Many Atherton owners will not accept public photography, open houses, or a searchable price history, so their homes move through a small network of agents with proven buyers. The tradeoff is real: off-market protects discretion but limits competition, and the two rarely maximize at once.
What is the median home price in Atherton?
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Recorded single-family sales have generally run from roughly $8M into the $10M+ range in 2025–2026, with West Atherton and Lindenwood at the top. Because unrecorded and off-market activity is significant, treat any published Atherton median as a floor rather than a full picture.
How long does it take to sell in Atherton?
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Listed inventory commonly takes five to eight weeks. The buyer pool is measured in dozens, not hundreds, so reaching it is a targeted relationship exercise rather than a volume marketing exercise. A longer marketing period is normal here and is not evidence of a mispriced home.
What should an Atherton seller prepare before launch?
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A complete package: survey, permit history for every structure including guest houses and sport courts, tree and heritage-oak documentation, septic or sewer status, and a pre-listing inspection. At this price point buyers bring architects and attorneys to the first tour, and unanswered questions become price reductions.
Ranges reflect recent MLSListings and San Mateo County recorder data for 2025–2026 and are approximate. A large share of Atherton transactions never appear in public listing data, so published medians understate true activity. Independent and public school access varies by address. Equal Housing Opportunity.
Live listings
Homes for sale in Atherton
Real-time MLS inventory, refreshed continuously. Save searches and request private tours. Also see our off-market & coming-soon inventory — several Atherton-area homes never reach Zillow or Redfin.
Thinking of selling?
Atherton home-selling strategy
This page is a community and market guide. If you own here, our guide to selling a home in Atherton covers pricing strategy, preparation, local buyer demand, and marketing — or start with a Silicon Valley home valuation.
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