Unshakable ZIP Data 60042 | Island Lake, IL Housing Market
Island Lake · McHenry County · Chicago-Naperville-Elgin, IL-IN-WI metro · Illinois · Data updated June 19, 2026
The median sale price in ZIP 60042, Island Lake, Illinois is $334,901 at $216 per square foot. 31 single-family homes sold in the latest period, up 3.0 percent from a year earlier. Homes sit a median of 40 days on market with 3.1 months of supply. Sellers are getting 101.0 percent of list price and 46.7 percent of homes sold above asking.
Balanced market.
Value anchors
| Metric | Value | Year over year |
|---|---|---|
| Average single-family value | $310,647 | |
| Average price per sq ft | $201 | |
| Median sale price | $334,901 | |
| Median sale price per sq ft | $216 | |
| Median home size | 1,547 sq ft | |
| Median new listing price | $347,033 | +23.9% |
| National size rank | 11,158 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 31 | +3.0% |
| Median days on market | 40 days | |
| Months of supply | 3.1 months | |
| New listings | 45 | +27.6% |
| Active listings | 61 | +16.9% |
| Pending sales | 47 | +16.6% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 101.0% | +1.2 pts |
| Share sold above list | 46.7% | +10.0 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
2-bedroom
$247,399
3-bedroom
$312,798
4-bedroom
$428,831
These figures describe the single-family market for Island Lake, Illinois ZIP 60042. They are market context, not a substitute for sold comps or a formal appraisal.