Unshakable ZIP Data 01863 | Chelmsford, MA Housing Market
Chelmsford · Middlesex County · Boston-Cambridge-Newton, MA-NH metro · Massachusetts · Data updated June 19, 2026
The median sale price in ZIP 01863, Chelmsford, Massachusetts is $494,853 at $361 per square foot. 38 single-family homes sold in the latest period, up 36.0 percent from a year earlier. Homes sit a median of 20 days on market with 2.1 months of supply. Sellers are getting 101.3 percent of list price and 62.2 percent of homes sold above asking.
Seller's market. No room for sloppy offers.
Value anchors
| Metric | Value | Year over year |
|---|---|---|
| Average single-family value | $655,686 | |
| Average price per sq ft | $479 | |
| Median sale price | $494,853 | |
| Median sale price per sq ft | $361 | |
| Median home size | 1,370 sq ft | |
| Median new listing price | $480,344 | -12.7% |
| National size rank | 10,129 |
Sales activity
| Metric | Value | Year over year |
|---|---|---|
| Homes sold | 38 | +36.0% |
| Median days on market | 20 days | |
| Months of supply | 2.1 months | |
| New listings | 57 | +45.8% |
| Active listings | 67 | +45.3% |
| Pending sales | 49 | +43.1% |
Pricing power
| Metric | Value | Year over year |
|---|---|---|
| Average sale-to-list ratio | 101.3% | -0.8 pts |
| Share sold above list | 62.2% | +5.0 pts |
Bedroom value anchors
Average values by bedroom count. Value anchors for orientation, not appraisals.
2-bedroom
$454,774
3-bedroom
$659,918
4-bedroom
$754,038
These figures describe the single-family market for Chelmsford, Massachusetts ZIP 01863. They are market context, not a substitute for sold comps or a formal appraisal.