Groton, CT
Southeastern Connecticut41.3466°N, 72.0389°W
Tracking 7,750 properties across Groton, Connecticut — a community where the median home dates to 1954 and the oldest to 1684. Every parcel mapped with building characteristics, environmental exposure, hazard risk, and ownership history assembled from 140+ sources.
7,750
Properties Tracked
1954
Median Year Built
$273K
Median Assessed Value
17%
FEMA Flood Zone
2.14M
NEP Data Facts Tracked
79%
Coastal Zone
Click any parcel to view intelligence
Groton, CTInc. 1705
Groton is home to the Naval Submarine Base New London — the "Submarine Capital of the World" — and the Electric Boat shipyard, where submarines are built. The military and defense presence dominates the town's economy and land use. The housing stock ranges from dense, older neighborhoods near the submarine base to suburban development inland. The Thames River and Long Island Sound create waterfront properties and coastal exposure.
For property professionals, Groton's military-dependent economy creates distinct dynamics — rental demand from naval personnel, security-related land-use constraints near the base, and the economic sensitivity to defense spending decisions. The coastal exposure along the Thames and the Sound brings flood and storm risk.
Risk Profile
FEMA flood zones, fire protection grades, radon, coastal exposure, storm surge — parcel by parcel
FEMA Flood Zones
1,323 properties (17%) are in FEMA Special Flood Hazard Areas, where flood insurance is required for federally-backed mortgages.
X
6,427
AE
909
VE
371
A
43
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
2,086
Grade B
4,022
Grade C
1,171
Grade D
417
Grade E
54
Coastal & Water Exposure
6,139 properties (79%) are within 3 miles of the ocean. 1,453 are classified as waterfront. The closest property is 0 ft from the coastline.
522
SLR 1 ft
Properties affected
826
SLR 3 ft
Properties affected
1,279
SLR 6 ft
Properties affected
2,637
Surge Exposure
Cat 1/2/3/4
976
Estuary
Waterfront
98
Pond
Waterfront
16
Lake
Waterfront
Zone 2
Radon Risk
123 mph
Design Wind Speed
ASCE 7 standard
30 psf
Ground Snow Load
ASCE 7 standard
Relatively Low
FEMA Risk Index
NRI composite rating
The Property Landscape
7,750 properties · Median year built 1954 · Avg 2,393 sf
Property Types
Single Family
5,197
Institutional
620
Condominium
541
Vacant Land
424
Commercial
421
Multi-Family
200
Other
173
Three-Family
50
Industrial
49
Residential Other
40
Construction by Era
Pre-1800
40
1800-1849
105
1850-1899
466
1900-1949
2,133
1950-1979
2,340
1980-1999
758
2000+
682
Architectural Styles
Ranch
1,528
Cape Cod
990
Old Style
972
Colonial
648
Multi-Family
591
Raised Ranch
360
Municipal Government
351
Contemporary
256
Market Activity
Recorded transactions from Southeastern Connecticut Registry of Deeds
54%
Owner-Occupied
10%
Out-of-State Owners
NE Provenance tracks recorded deeds, mortgages, and liens for 90% 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.
Living in Groton
Southeastern Connecticut · Connecticut
Zip Codes06339063400634906355
VillagesMystic
38,411
Population
2020 Census
7,750
Properties
$273K
Median Assessed
54%
Owner-Occupied
31.1
Square Miles
Groton covers 31.1 square miles in Southeastern Connecticut, Connecticut. The median assessed property value is $273K.
Single-family homes account for 5,197 of Groton's 7,750 properties, with 541 condominiums and 250 multi-family buildings. There are 421 commercial properties and 424 parcels of vacant land. About 54% of properties are owner-occupied, and 10% are owned by someone out of state.
Assessed values range widely — the middle 50% of properties fall between $191K and $486K, with the highest assessed property at $999.2M. For professionals working in this market, the value spread tells you a lot about what you'll encounter door to door.
Most of Groton (82%) is on municipal sewer, and 93% have public water service. Electric service is provided by MOHEGAN TRIBAL UTILITY AUTHORITY. 1,510 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
With 17% of properties in FEMA flood zones and 79% in the coastal zone, Groton concentrates several major underwriting variables. Parcel-level hazard data provides the granularity that ZIP-level aggregation misses.
Insurance solutionsReal Estate & Appraisal
Groton's 10 property types, spanning construction from 1684 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. 17% 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
Understanding a property's construction era, environmental exposure, and building characteristics before arriving on site transforms inspection from discovery to verification.
Inspection solutionsExplore Groton property intelligence.
7,750 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-ct. For references or attribution, please link back to this page or neprovenance.com. Thank you, we appreciate it.