Unshakable ZIP Data 94528 | Diablo, CA Housing Market
Diablo · Contra Costa County · San Francisco-Oakland-Berkeley, CA metro · California · Data updated June 19, 2026
The median sale price in ZIP 94528, Diablo, California is $2,519,252 at $896 per square foot. 1 single-family homes sold in the latest period, down 74.3 percent from a year earlier. Homes sit a median of 0 days on market with 9.6 months of supply. Sellers are getting 100.0 percent of list price and 0.0 percent of homes sold above asking.
Buyer leverage market. Negotiate hard.
Value anchors
| Metric | Value | Year over year |
|---|---|---|
| Average single-family value | $3,142,183 | |
| Average price per sq ft | $1,117 | |
| Median sale price | $2,519,252 | |
| Median sale price per sq ft | $896 | |
| Median home size | 2,813 sq ft | |
| Median new listing price | $5,273,918 | +50.7% |
| National size rank | 22,907 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 1 | -74.3% |
| Median days on market | 0 days | |
| Months of supply | 9.6 months | |
| New listings | 4 | +1.5% |
| Active listings | 4 | -32.5% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 100.0% | -0.9 pts |
| Share sold above list | 0.0% | -25.0 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
4-bedroom
$2,878,085
5-bedroom
$3,885,069
These figures describe the single-family market for Diablo, California ZIP 94528. They are market context, not a substitute for sold comps or a formal appraisal.