By Matthew Martinez, Founder, CEO & Managing Broker, Diamond Real Estate Group. California DRE #01869679.
Santa Clara County’s luxury market is concentrated in a few supply-limited towns, such as Palo Alto, Los Altos, Los Altos Hills, Saratoga, Los Gatos and Monte Sereno, where demand from technology and AI wealth has outpaced the broader county: the county’s September 2026 median single-family price was $1,920,000, down 4% from a year earlier, even as Compass reported Silicon Valley’s $10 million-plus market rebounding.
At the top, buyers are paying for land, privacy and location near jobs and capital. Here’s how the luxury communities compare, what’s driving demand, and how to buy or sell well.
The numbers
| Measure | Figure | Source |
|---|---|---|
| Santa Clara County median, Sept 2026 | $1,920,000 (down 4.0%; sales up 1.5%) | C.A.R. |
| San Mateo County median, Sept 2026 | $2,327,500 (up 8.3%; sales down 8.6%) | C.A.R. |
| U.S. sales of $10 million and up, 2025 | 2,261 sales totaling $38.63 billion; Silicon Valley/Peninsula among markets reversing multi-year declines | RISMedia (Compass report) |
| San Francisco metro luxury sales, March 2026 | Up 22.2%; median luxury price $6,808,561 | Redfin |
The contrast between a falling county median and a rising top end is the story of 2026: Compass tied the high-end rebound to markets with stock-based compensation and startup liquidity, while the broader county market is more sensitive to mortgage rates. Redfin’s luxury figures cover the San Francisco metro, which includes the Peninsula’s San Mateo County but not Santa Clara County; we include them for context.
The luxury communities
| Community | Character |
|---|---|
| Palo Alto | Stanford adjacency, walkable downtown, smaller lots, Eichlers and estates |
| Los Altos Hills | Hillside acreage, views, privacy |
| Los Altos | Walkable village downtown, larger suburban lots |
| Saratoga and Monte Sereno | Foothill settings and estates in the West Valley |
| Los Gatos | A lively downtown with hillside estates above it |
The difference in density is stark. Palo Alto has 67,609 residents on 24.10 square miles, and 54.6% of its homes are owner-occupied (Census). Los Altos Hills has 8,419 residents on 9.03 square miles, and 93.4% of homes are owner-occupied (Census).
The West Valley towns are similar in scale: Saratoga has 30,418 residents on 12.78 square miles with 86.4% of homes owner-occupied; Los Gatos 32,576 on 11.55 square miles at 64.9%; and Los Altos 30,965 on 6.54 square miles at 81.7% (Saratoga; Los Gatos; Los Altos).
Sale data shows how hot the core towns are. In Palo Alto, the median sale price was $3,608,282 in the three months to September 2026, homes sold in a median of 13 days at 107.1% of list, and 62.4% sold above list (Redfin: Palo Alto).
The Census Bureau’s top value category is “$2,000,000+,” and that’s what it reports for Palo Alto and Los Altos Hills, so sale prices are the only useful value measure at this level. Just over the county line in San Mateo County, Atherton had a 2025 median sale price of about $8.3 million, the second highest ZIP code in the country (The Almanac), and Woodside and Portola Valley offer acreage and equestrian properties.
What’s driving demand
Wealth that sits nearby
Silicon Valley’s luxury towns are minutes from the companies and venture firms that create the region’s wealth. When private companies raise money, run tender offers or go public, some of that liquidity turns into home purchases. Redfin’s agents cited AI-industry pay as a major factor in the region’s 2026 luxury surge.
Land that can’t be added
Large parcels in Los Altos Hills and the foothills can’t be manufactured, and walkable luxury near downtown Palo Alto, Los Altos and Los Gatos is limited by built-out neighborhoods.
A buyer pool that shops for ecosystems
Top-end buyers look for privacy, multiple work spaces, wellness and guest space, pools, strong power and networking, and security, but also for school district access, airport access, commute and nearby dining.
What could slow it down
The buyer pool is wealthy but not immune to volatility. Private-company valuations, IPO timing, interest rates, public markets, tax planning and hiring all affect liquidity. At the property level, over-customization, poor siting, dated systems, insurance problems or unrealistic pricing can mean long market times even when headlines are strong.
Buying a Silicon Valley luxury home
- Underwrite the land: lot size, usable area, slope and what could be built.
- Check systems and seismic condition, especially in older estates and hillside homes.
- Review permits for additions, ADUs, pools and grading.
- Get insurance quotes early for hillside and wooded properties.
- Look beyond public listings. Many owners prefer discreet sales; combining public inventory with direct outreach can surface options before they’re marketed. Our investor page explains how we approach off-market sourcing.
Financing and costs
The 2026 conforming loan ceiling for high-cost areas is $1,249,125 (FHFA), so luxury purchases here are cash or jumbo loans. Property tax resets to about 1% of the price plus local charges, and insurance on wooded hillside homes needs early underwriting. Bidding in the hottest towns often goes well over list, as Palo Alto’s 107% sale-to-list ratio shows, so set a walk-away price before you write.
Selling at the top
Price from the most comparable recent sales in your town and micro-neighborhood, prepare full disclosures and inspection reports, and decide early between a public launch and a quieter, targeted approach. Start with a home valuation.
Silicon Valley buyers and wine country
If you’re also considering a second home in Napa or Sonoma, see our luxury real estate guide and AI founders and Napa-Sonoma real estate. For the city, see luxury homes in San Francisco. Our Santa Clara County guide covers the wider county, and you can contact us for a confidential conversation.
Questions people ask
Which Santa Clara County towns are most expensive?
Palo Alto, Los Altos, Los Altos Hills, Saratoga, Monte Sereno and Los Gatos are the usual luxury markets, with prices depending heavily on lot and location.
Why did the county median fall while luxury rose?
The median reflects the whole market, which is sensitive to mortgage rates. The top end depends more on equity wealth and cash.
Is AI wealth driving prices?
It’s one factor cited by Redfin and Compass, along with pent-up demand and very limited supply.
Sources & notes
- C.A.R. September 2026; RISMedia: Compass ultra-luxury report; Redfin (May 2026)
- Census QuickFacts for Palo Alto and Los Altos Hills; The Almanac: Atherton
Last reviewed October 2026 by Matthew Martinez.
