Unshakable ZIP Data 13640 | Jefferson County, NY Housing Market
Jefferson County · Watertown-Fort Drum, NY metro · New York · Data updated June 19, 2026
The median sale price in ZIP 13640, Jefferson County, New York is $547,337 at $238 per square foot. 2 single-family homes sold in the latest period, up 3.0 percent from a year earlier. Homes sit a median of 170 days on market with 15.9 months of supply. Sellers are getting 96.4 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 | $468,881 | |
| Average price per sq ft | $204 | |
| Median sale price | $547,337 | |
| Median sale price per sq ft | $238 | |
| Median home size | 2,296 sq ft | |
| Median new listing price | $632,097 | +26.7% |
| National size rank | 26,184 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 2 | +3.0% |
| Median days on market | 170 days | |
| Months of supply | 15.9 months | |
| New listings | 10 | +12.8% |
| Active listings | 13 | +9.7% |
| Pending sales | 4 | -18.9% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 96.4% | +3.0 pts |
| Share sold above list | 0.0% | 0.0 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
3-bedroom
$518,917
These figures describe the single-family market for Jefferson County, New York ZIP 13640. They are market context, not a substitute for sold comps or a formal appraisal.