Chelmsford, MA
Middlesex County42.5969°N, 71.3518°W
Tracking 11,014 properties across Chelmsford, Massachusetts — a community where the median home dates to 1966 and the oldest to 1656. Every parcel mapped with building characteristics, environmental exposure, hazard risk, and ownership history assembled from 140+ sources.
11,014
Properties Tracked
1966
Median Year Built
$569K
Median Assessed Value
4%
FEMA Flood Zone
3.07M
NEP Data Facts Tracked
Zone 1
Radon Zone
Click any parcel to view intelligence
Chelmsford, MAInc. 1633
Chelmsford is a large suburban town at the intersection of Routes 3 and 129, positioned between Lowell to the north and the Route 128 communities to the south. The town developed primarily as a post-war suburb, and the housing stock reflects that era — single-family ranches, capes, and colonials on moderate lots, with some older village-center homes near the historic center and newer construction in recent subdivisions.
The town's size and location give it a diverse property base. The commercial corridors along Routes 3 and 129 bring office, retail, and light industrial properties. The residential neighborhoods range from modest post-war development to more affluent areas with larger homes and lots. For property professionals, Chelmsford is a solid suburban market with enough transaction volume to support meaningful comparable analysis, and enough variation across neighborhoods to require attention to location-specific factors.
Risk Profile
FEMA flood zones, fire protection grades, radon — parcel by parcel
FEMA Flood Zones
491 properties (4%) are in FEMA Special Flood Hazard Areas, where flood insurance is required for federally-backed mortgages.
X
10,523
A
256
AE
235
Fire Protection Grades
Fire protection grades reflect proximity to fire stations and hydrant infrastructure. Grade affects insurance pricing in every New England state.
Grade A
2,070
Grade B
5,792
Grade C
2,993
Grade D
159
Zone 1
Radon Risk
123 mph
Design Wind Speed
ASCE 7 standard
50 psf
Ground Snow Load
ASCE 7 standard
Very Low
FEMA Risk Index
NRI composite rating
The Property Landscape
11,014 properties · Median year built 1966 · Avg 2,399 sf
Property Types
Single Family
7,476
Two-Family
1,511
Institutional
686
Vacant Land
518
Commercial
348
Multi-Family
188
Industrial
185
Other
30
Residential Other
29
Mixed Use
24
Construction by Era
Pre-1800
60
1800-1849
70
1850-1899
218
1900-1949
1,076
1950-1979
5,492
1980-1999
2,100
2000+
786
Architectural Styles
Colonial
2,318
Ranch
2,286
Cape Cod
1,001
Vacant Land
961
Raised Ranch
850
Conventional
487
Condo Tnhs Gd
288
Condominium
221
Market Activity
Recorded transactions from Middlesex County Registry of Deeds
67%
Owner-Occupied
2%
Out-of-State Owners
NE Provenance tracks recorded deeds, mortgages, and liens for 99% of Chelmsford properties. Ownership intelligence includes transaction history, entity detection, portfolio identification, and lien analysis — assembled from public registry records into a single property-level profile.
Living in Chelmsford
Middlesex County · Massachusetts
Zip Codes0182401863
36,392
Population
2020 Census
11,014
Properties
$569K
Median Assessed
67%
Owner-Occupied
23.1
Square Miles
Chelmsford covers 23.1 square miles in Middlesex County, Massachusetts. The median assessed property value is $569K.
Single-family homes account for 7,476 of Chelmsford's 11,014 properties and 1,700 multi-family buildings. There are 348 commercial properties and 518 parcels of vacant land. About 67% of properties are owner-occupied.
Assessed values range widely — the middle 50% of properties fall between $437K and $690K, with the highest assessed property at $43.2M. For professionals working in this market, the value spread tells you a lot about what you'll encounter door to door.
Most of Chelmsford (96%) is on municipal sewer. Electric service is provided by MASSACHUSETTS BAY TRANS AUTHORITY. 999 properties have identified commercial activity — restaurants, retail, professional offices, and services that give Chelmsford its character.
What Chelmsford Property Intelligence Means for Professionals
Insurance & Underwriting
Chelmsford's fire protection grade distribution (2,070 Grade A, 5,792 Grade B) directly affects premium calculation. Parcel-level hazard data provides the granularity that ZIP-level aggregation misses.
Insurance solutionsReal Estate & Appraisal
Chelmsford's 10 property types, spanning construction from 1656 to present, require local market knowledge for accurate comparable selection and valuation. NEP assembles building characteristics, environmental exposure, and condition signals into a single property profile.
Real estate solutionsLending & Title
Collateral assessment requires flood zone verification, environmental screening, and ownership chain validation. 4% of Chelmsford properties are in SFHAs where flood insurance is a federal lending requirement. NEP provides property-level compliance data from public records.
Lending solutionsInspection & Property Services
Understanding a property's construction era, environmental exposure, and building characteristics before arriving on site transforms inspection from discovery to verification.
Inspection solutionsExplore Chelmsford property intelligence.
11,014 Chelmsford properties — each with risk profiles, building data, permit history, and ownership analysis from 140+ sources. Open any property and see the full picture.
Newburyport, MA · Federalist · 3,524 sq ft · 4 bed / 3 bath · Built 1800 · Historic District
NEP Property Intelligence Summary
ConditionC1Fire ClassBFlood ZoneXOwnerIndividualOccupancyOwner-Occupied
Purchased2018 (8yr)Permits11 totalSystems3 updatedLiensClearAssessed$1.6MOcean0.3 mi
EraPre-1940HistoricDesignatedRenovationRecentRadonZone 1
Cite this data
Source: NE Provenance, “Professional Property Intelligence for New England,” neprovenance.com/insights/town/chelmsford-ma. For references or attribution, please link back to this page or neprovenance.com. Thank you, we appreciate it.