Groton, MA
Middlesex County42.6112°N, 71.5745°W
Tracking 5,150 properties across Groton, Massachusetts — a community where the median home dates to 1985 and the oldest to 1669. Every parcel mapped with building characteristics, environmental exposure, hazard risk, and ownership history assembled from 140+ sources.
5,150
Properties Tracked
1985
Median Year Built
$569K
Median Assessed Value
4%
FEMA Flood Zone
1.43M
NEP Data Facts Tracked
Zone 1
Radon Zone
Click any parcel to view intelligence
Groton, MAInc. 1655
Groton is a large, primarily rural town in the northwestern part of Middlesex County, home to two prestigious prep schools — Groton School and Lawrence Academy — that occupy significant land area and contribute to the town's character. The town center retains a classic New England village feel, with a town common, white-steepled church, and surrounding historic homes. Beyond the center, Groton is wooded and agricultural, with large-lot residential development and significant conservation land.
The Nashua River runs through the town's western sections, creating flood zone exposure and environmental features. For property professionals, Groton's profile is similar to the affluent rural towns elsewhere in the county — high-value single-family homes, large lots, private infrastructure, and limited commercial activity. The prep school presence creates institutional property and seasonal dynamics that affect the local market in ways that don't appear in standard data.
Risk Profile
FEMA flood zones, fire protection grades, radon — parcel by parcel
FEMA Flood Zones
230 properties (4%) are in FEMA Special Flood Hazard Areas, where flood insurance is required for federally-backed mortgages.
X
4,920
AE
170
A
60
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
148
Grade B
921
Grade C
1,546
Grade D
1,698
Grade E
837
Zone 1
Radon Risk
123 mph
Design Wind Speed
ASCE 7 standard
50 psf
Ground Snow Load
ASCE 7 standard
Relatively Low
FEMA Risk Index
NRI composite rating
The Property Landscape
5,150 properties · Median year built 1985 · Avg 2,543 sf
Property Types
Single Family
3,277
Institutional
668
Vacant Land
418
Two-Family
342
Multi-Family
191
Commercial
90
Mixed Use
73
Other
42
Agricultural / Open Space
23
Industrial
21
Construction by Era
Pre-1800
75
1800-1849
109
1850-1899
149
1900-1949
532
1950-1979
884
1980-1999
1,419
2000+
920
Architectural Styles
Colonial
1,736
Vacant Land
450
Cape Cod
388
Ranch
386
Contemporary
232
Condominium
168
Government Land
164
Multi-Family
144
Market Activity
Recorded transactions from Middlesex County Registry of Deeds
1
Sales (12 mo)
Arms-length transactions
$250K
Median Sale Price
Past 12 months
63%
Owner-Occupied
2%
Out-of-State Owners
NE Provenance tracks recorded deeds, mortgages, and liens for 97% of Groton properties. Ownership intelligence includes transaction history, entity detection, portfolio identification, and lien analysis — assembled from public registry records into a single property-level profile.
Building Permits & Maintenance
10,047 municipal building permits on file · 51% of properties
NE Provenance tracks 10,047 building permits across 2,609 Groton properties — 51% coverage. 1,925 properties have permit activity in the last five years.
Each permit record reveals maintenance decisions: roof replacements, electrical upgrades, kitchen renovations, solar installations. For insurance, lending, and appraisal professionals, permit history is the most objective evidence of property condition available from public records.
10,047
Permits on File
51%
Coverage
Properties with permits
1,925
Active (5yr)
Recent permit activity
79%
Condition Rated
NEP assessment
Living in Groton
Middlesex County · Massachusetts
Zip Codes014320145001463014690147201879
11,315
Population
2020 Census
5,150
Properties
$569K
Median Assessed
63%
Owner-Occupied
33.8
Square Miles
Groton covers 33.8 square miles in Middlesex County, Massachusetts. The median assessed property value is $569K.
Single-family homes account for 3,277 of Groton's 5,150 properties and 538 multi-family buildings. There are 90 commercial properties and 418 parcels of vacant land. About 63% of properties are owner-occupied, and 2% are owned by someone out of state.
Assessed values range widely — the middle 50% of properties fall between $325K and $764K, with the highest assessed property at $239.5M. For professionals working in this market, the value spread tells you a lot about what you'll encounter door to door.
Most properties rely on private septic systems, and 57% have public water service. Electric service is provided by MASSACHUSETTS BAY TRANS AUTHORITY. 510 properties have identified commercial activity — restaurants, retail, professional offices, and services that give Groton its character.
What Groton Property Intelligence Means for Professionals
Insurance & Underwriting
Groton's fire protection grade distribution (148 Grade A, 921 Grade B) directly affects premium calculation. Parcel-level hazard data provides the granularity that ZIP-level aggregation misses.
Insurance solutionsReal Estate & Appraisal
Groton's 10 property types, spanning construction from 1669 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 Groton 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
10,047 permits across 51% of properties means most Groton inspection assignments can start with documented renovation and system history, not a blank slate.
Inspection solutionsExplore Groton property intelligence.
5,150 Groton 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/groton-ma. For references or attribution, please link back to this page or neprovenance.com. Thank you, we appreciate it.