Unshakable ZIP Data 11751 | Islip, NY Housing Market
Islip · Suffolk County · New York-Newark-Jersey City, NY-NJ-PA metro · New York · Data updated June 19, 2026
The median sale price in ZIP 11751, Islip, New York is $676,799 at $427 per square foot. 31 single-family homes sold in the latest period, up 23.6 percent from a year earlier. Homes sit a median of 35 days on market with 2.2 months of supply. Sellers are getting 103.7 percent of list price and 53.3 percent of homes sold above asking.
Balanced market.
Value anchors
| Metric | Value | Year over year |
|---|---|---|
| Average single-family value | $682,728 | |
| Average price per sq ft | $431 | |
| Median sale price | $676,799 | |
| Median sale price per sq ft | $427 | |
| Median home size | 1,584 sq ft | |
| Median new listing price | $594,914 | -4.0% |
| National size rank | 7,850 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 31 | +23.6% |
| Median days on market | 35 days | |
| Months of supply | 2.2 months | |
| New listings | 50 | -9.6% |
| Active listings | 80 | +6.7% |
| Pending sales | 50 | +1.4% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 103.7% | -0.7 pts |
| Share sold above list | 53.3% | -2.7 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
2-bedroom
$488,432
3-bedroom
$674,218
4-bedroom
$750,318
5-bedroom
$827,029
These figures describe the single-family market for Islip, New York ZIP 11751. They are market context, not a substitute for sold comps or a formal appraisal.