Derby, CT
Naugatuck Valley41.3224°N, 73.0890°W
Tracking 3,544 properties across Derby, Connecticut — a community where the median home dates to 1955 and the oldest to 1713. Every parcel mapped with building characteristics, environmental exposure, hazard risk, and ownership history assembled from 140+ sources.
3,544
Properties Tracked
1955
Median Year Built
$6K
Median Assessed Value
3%
FEMA Flood Zone
868,551
NEP Data Facts Tracked
Zone 1
Radon Zone
Click any parcel to view intelligence
Derby, CTInc. 1675
Derby is the smallest city in Connecticut by area, at the confluence of the Naugatuck and Housatonic Rivers. The city's compact downtown and dense residential neighborhoods reflect its manufacturing heritage. The river confluence creates significant flood zone exposure.
For property professionals, Derby is an affordable, dense urban market where the dual-river flood risk and the older housing stock are the primary assessment considerations.
Risk Profile
FEMA flood zones, fire protection grades, radon — parcel by parcel
FEMA Flood Zones
97 properties (3%) are in FEMA Special Flood Hazard Areas, where flood insurance is required for federally-backed mortgages.
X
3,447
AE
75
A
22
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
1,579
Grade B
1,670
Grade C
249
Grade D
38
Grade E
8
Zone 1
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
3,544 properties · Median year built 1955 · Avg 2,232 sf
Property Types
Single Family
2,881
Other
314
Institutional
120
Two-Family
116
Mixed Use
63
Three-Family
27
Multi-Family
19
Vacant Land
3
Residential Other
1
Construction by Era
Pre-1800
5
1800-1849
50
1850-1899
395
1900-1949
738
1950-1979
1,247
1980-1999
308
2000+
166
Market Activity
Recorded transactions from Naugatuck Valley Registry of Deeds
0%
Owner-Occupied
NE Provenance tracks recorded deeds, mortgages, and liens for 77% of Derby 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 Derby
Naugatuck Valley · Connecticut
Zip Codes06401064180648306484
12,325
Population
2020 Census
3,544
Properties
$6K
Median Assessed
0%
Owner-Occupied
5.1
Square Miles
Derby covers 5.1 square miles in Naugatuck Valley, Connecticut. The median assessed property value is $6K.
Single-family homes account for 2,881 of Derby's 3,544 properties and 162 multi-family buildings. About 0% of properties are owner-occupied.
Assessed values range widely — the middle 50% of properties fall between $4K and $120K. For professionals working in this market, the value spread tells you a lot about what you'll encounter door to door.
Most of Derby (91%) is on municipal sewer. Electric service is provided by UNITED ILLUMINATING CO. 989 properties have identified commercial activity — restaurants, retail, professional offices, and services that give Derby its character.
Environmental note: Derby has an average EPA lead paint indicator at the 66th percentile nationally, consistent with 450 properties built before 1900 when lead paint was standard. 2,872 properties exceed at least one EPA environmental justice threshold — a factor in lending compliance and environmental due diligence.
What Derby Property Intelligence Means for Professionals
Insurance & Underwriting
Derby's fire protection grade distribution (1,579 Grade A, 1,670 Grade B) directly affects premium calculation. Parcel-level hazard data provides the granularity that ZIP-level aggregation misses.
Insurance solutionsReal Estate & Appraisal
Derby's 9 property types, spanning construction from 1713 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. 3% of Derby 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 Derby property intelligence.
3,544 Derby 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/derby-ct. For references or attribution, please link back to this page or neprovenance.com. Thank you, we appreciate it.