Unshakable ZIP Data 98010 | Black Diamond, WA Housing Market
Black Diamond · King County · Seattle-Tacoma-Bellevue, WA metro · Washington · Data updated June 19, 2026
The median sale price in ZIP 98010, Black Diamond, Washington is $779,718 at $352 per square foot. 73 single-family homes sold in the latest period, up 55.5 percent from a year earlier. Homes sit a median of 35 days on market with 3.1 months of supply. Sellers are getting 100.3 percent of list price and 22.5 percent of homes sold above asking.
Balanced market.
Value anchors
| Metric | Value | Year over year |
|---|---|---|
| Average single-family value | $784,983 | |
| Average price per sq ft | $354 | |
| Median sale price | $779,718 | |
| Median sale price per sq ft | $352 | |
| Median home size | 2,215 sq ft | |
| Median new listing price | $738,636 | -11.1% |
| National size rank | 11,601 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 73 | +55.5% |
| Median days on market | 35 days | |
| Months of supply | 3.1 months | |
| New listings | 101 | +11.7% |
| Active listings | 158 | +17.9% |
| Pending sales | 75 | +38.9% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 100.3% | -0.7 pts |
| Share sold above list | 22.5% | -11.5 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
2-bedroom
$707,390
3-bedroom
$687,506
4-bedroom
$840,240
5-bedroom
$942,372
These figures describe the single-family market for Black Diamond, Washington ZIP 98010. They are market context, not a substitute for sold comps or a formal appraisal.