Portola Valley, CA housing market
Data through Aug 2026 · Seller's market · leverage 20
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Home Value
$4.3M
+11.4% vs. a year ago
Buyer Leverage Score
20
Sep 2026
Months of Supply
1.9 months
Aug 2026
Days on Market
66 days
Sep 2026
Price Cut %
11%
Sep 2026
Sale-to-List Ratio
99.2%
Aug 2026
Mtg Payment as % of Income
115%
Aug 2026
Overvalued %
34%
Aug 2026
Expected Disaster Loss
$338
Dec 2025
What this means
- Valuation. Prices are 34% above what local incomes have historically supported (this area's pre-2020 price-to-income ratio).
- Prices. Home values are up 11.4% over the past year (U.S.: +1.2%).
- Supply. Listings are 12% below the 2017-19 norm and falling (−44% vs. a year ago), still somewhat tight.
- Negotiating. Buyer leverage is low (20/100; U.S.: 54): homes sell for about 0.8% below their final list price; 11% of listings had a price cut (U.S.: 26%).
- Affordability. A mortgage on the typical home takes 115% of the median household income (U.S.: 35%); it takes about $956k a year to keep the payment at 30% of gross pay. That includes about $2,523 a year for home insurance (U.S.: $1,790).
- Disaster risk. FEMA expects about $338 a year in natural-disaster damage per $100k of building value (U.S.: $155), mostly from earthquakes. Earthquakes aren't covered by standard homeowners insurance.
- Outlook. Leaning up: likely −3% to +13% over the next 12 months (82% chance of a rise).
Next 12 months
Leaning up
Prices are more likely to rise than fall over the next year. Likely change: −3.2% to +13.1% (80% range; middle estimate +6.0%), chance of a rise 82%, of a 5%+ drop 6%.
HouseVane's model, refit every month on local market signals and national ones, trained only on data known at the time. How accurate it has been.
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