Unshakable ZIP Data 94028 | Portola Valley, CA Housing Market
Portola Valley · San Mateo County · San Francisco-Oakland-Berkeley, CA metro · California · Data updated June 19, 2026
The median sale price in ZIP 94028, Portola Valley, California is $4,598,635 at $1,556 per square foot. 22 single-family homes sold in the latest period, down 6.0 percent from a year earlier. Homes sit a median of 17 days on market with 2.1 months of supply. Sellers are getting 100.5 percent of list price and 42.9 percent of homes sold above asking.
Seller's market. No room for sloppy offers.
Value anchors
| Metric | Value | Year over year |
|---|---|---|
| Average single-family value | $4,265,062 | |
| Average price per sq ft | $1,443 | |
| Median sale price | $4,598,635 | |
| Median sale price per sq ft | $1,556 | |
| Median home size | 2,955 sq ft | |
| Median new listing price | $4,213,978 | +5.4% |
| National size rank | 12,357 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 22 | -6.0% |
| Median days on market | 17 days | |
| Months of supply | 2.1 months | |
| New listings | 34 | -18.3% |
| Active listings | 48 | -20.7% |
| Pending sales | 27 | +9.5% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 100.5% | -1.4 pts |
| Share sold above list | 42.9% | -13.7 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
These figures describe the single-family market for Portola Valley, California ZIP 94028. They are market context, not a substitute for sold comps or a formal appraisal.