Duplex (2 Units, Any Combination)Residential
42 SPRING ST
DERBY, CT 06418
5
Beds
2
Baths
3,550 ft²
Living AreaTotal finished area of the structures, from county records. Some counties include shared space like hallways or a building gym, so it may not match a listing.
0.12 ac
Lot SizeThe size of the land the home sits on, from county records.
1928
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
12
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
Tax & Assessment
Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,292 (2025)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$191,940 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$31,740
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$160,200
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$191,940
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$274,200
Climate Risk
Overall riskThe average of the five hazard scores below, on a 0 to 100 scale. Higher means greater projected risk over the coming decades.42
10
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
5
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
61
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
97
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
39
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.6 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.6%
FEMA Flood ZoneFEMA's flood zone for this address. Zones starting with A or V are high risk, and lenders usually require flood insurance there.minimal
Scores 0–100; higher = greater projected risk.
Property Facts
Property TypeThe broad category the county puts this property in, such as residential or commercial.Duplex (2 Units, Any Combination)
CountyNAUGATUCK VALLEY
Lot (acres)The size of the land the home sits on, from county records.0.12
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
HeatingThe type of heating system in the home.Hot Water
CoolingThe type of cooling or air conditioning in the home.Yes
PoolWhether the property has a pool, and what kind, such as in-ground.No
Transaction History(1)
Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.
HME
Derby High SchoolD-
High · Grades 9–12 · 0.4 mi
Derby Middle SchoolD+
Middle · Grades 6–8 · 0.4 mi
Irving SchoolD-
Elementary · Grades KG–5 · 0.5 mi
District: Derby School District
Neighborhood · ZIP 06418These are comparison scores, not percentages. 100 equals the national average, so 150 means about 50% above average.
CrimeLocal crime compared with the rest of the country, where 100 is average. It reflects things like population density, income, and how crime gets reported.109
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.113
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.69
Index scale: 100 = US average (tick). Lower is better.
Homes occupiedThe share of homes here that someone lives in. The rest sit empty, including vacation and for-sale homes.95%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.16%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.15%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.9%
PopulationHow many people live in this area.12,707
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,336 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$63,431
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$87,707
Average tempThe average temperature here across a full year.51°F
Annual precipHow much rain and melted snow falls here in a typical year.50 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%
Owner Tools
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How this home compares
42 Spring St measured against every home in its neighborhood, its ZIP code and its county, using county assessor records refreshed nightly. A home can stand out in one of those areas and look ordinary in another, because each one holds a different mix of homes.
- Among the largest homes in Derby 06418
- Has a smaller lot than 93% of homes in Naugatuck Valley County
- Older than 85% of homes in Naugatuck Valley County
How it measures up in Derby 06418
The dot is this home. The mark in the middle is the typical home in Derby 06418.
Living area3,550 ft²
SmallerTypical 1,384 ft²Bigger
Bigger than almost all homes nearby
Lot size0.12 ac
SmallerTypical 0.25 acBigger
Bigger than 8% of homes nearby
Year built1928
OlderTypical 1959Newer
Newer than 25% of homes nearby
| Measure | This home | Derby 06418 | Naugatuck Valley County |
|---|---|---|---|
| Living areabigger than | 3,550 ft² | almost all homes | 97% of homes |
| Lot sizebigger than | 0.12 ac | 8% of homes | 7% of homes |
| Year builtnewer than | 1928 | 25% of homes | 15% of homes |
About 42 Spring St
When did 42 Spring St, Derby, CT last sell?
42 Spring St, Derby, CT last sold on Jan 1, 1900, according to the county's recorded deed.
How big is 42 Spring St, Derby, CT?
42 Spring St, Derby, CT has 5 bedrooms, 2 bathrooms, 3,550 square feet of living space and a 0.12-acre lot.
When was 42 Spring St, Derby, CT built?
42 Spring St, Derby, CT was built in 1928, making it 98 years old. The building has 2 stories.
What schools serve 42 Spring St, Derby, CT?
42 Spring St, Derby, CT is assigned to Derby High School (high), rated D-; Derby Middle School (middle), rated D+; Irving School (elementary), rated D-. All sit in Derby School District. Attendance boundaries change — confirm with the district before relying on an assignment.
How does 42 Spring St, Derby, CT compare to other homes in Derby 06418?
Among the 3,850 homes in Derby 06418, it is bigger than almost all of them (3,550 ft² against a typical 1,384 ft²), its lot is bigger than 8% of them (0.12 ac against a typical 0.25 ac) and it is newer than 25% of them (1928 against a typical 1959). These shares are recounted nightly from the full county assessor record for each area, not from active listings.
What are the property taxes on 42 Spring St, Derby, CT?
The 2025 property tax bill for 42 Spring St, Derby, CT was $8,292. The county assessed it at $191,940.
More homes on Spring St
- 45 Spring St # 475 bd · 3 ba · 2,748 ft² · Sold $248K · May 2022
- 36 Spring St$287K1 ba · 1,040 ft² · Sold $247K · May 2022
- 35 Spring St$307K4 bd · 1 ba · 1,512 ft² · Sold $200K · Jul 2020
- 5 Spring St3 bd · 3 ba · 2,115 ft² · Sold $173K · Sep 2019
- 50 Spring St # 525 bd · 3 ba · 2,989 ft² · Sold $178K · Oct 2012
- 46 Spring St # 484 bd · 2 ba · 2,752 ft² · Sold $325K · Sep 2005
- 41 Spring St # 436 bd · 2.5 ba · 3,345 ft² · Sold $230K · Sep 2004
- 49 Spring St # 514 bd · 2 ba · 2,436 ft² · Sold $58K · Feb 2000
- 37 Spring St # 392 bd · 1 ba · 0.12 ac · Sold $213K · Apr 1990
- 38 Spring St # 404 bd · 2 ba · 2,974 ft² · Sold Jan 1900
Closest homes
- 46 Spring St47 ft · 4 bd · 2 ba · 2,752 ft² · Sold $325K · Sep 2005
- 38 Spring St49 ft · 4 bd · 2 ba · 2,974 ft² · Sold Jan 1900
- 9 Summer St$340K98 ft · 3 bd · 1.5 ba · 1,416 ft² · Sold $300K · Jan 2025
- 31 Mohawk Ave$296K94 ft · 4 bd · 1.5 ba · 1,534 ft² · Sold $165K · Feb 2005
- 57 Summer St110 ft · 4 bd · 2 ba · 2,476 ft² · Sold $130K · Apr 2000
- 50 Spring St93 ft · 5 bd · 3 ba · 2,989 ft² · Sold $178K · Oct 2012
- 36 Spring St$287K101 ft · 1 ba · 1,040 ft² · Sold $247K · May 2022
- 11 Summer St$288K132 ft · 3 bd · 1 ba · 1,524 ft² · Sold $78K · Mar 1999
More homes in Derby 06418
- 30 Orangewood W$343K3 bd · 2.5 ba · 1,450 ft² · Sold $348K · Oct 2026
- 43 Prairie Ave$459K3 bd · 1.5 ba · 1,248 ft² · Sold $469K · Oct 2026
- 1 Prindle Ave$354K3 bd · 2 ba · 2,088 ft² · Sold $280K · Oct 2026
- 61 Mount Pleasant St3 bd · 2 ba · 1,180 ft² · Sold $330K · Sep 2026
- 140 Emmett Ave$380K3 bd · 2.5 ba · 1,486 ft² · Sold $370K · Sep 2026
- 42 Coppola Ter$427K3 bd · 2 ba · 1,210 ft² · Sold $425K · Sep 2026
- 3 Coppola Ter$400K3 bd · 1 ba · 1,292 ft² · Sold $415K · Sep 2026
- 4 Oak St7 bd · 3.5 ba · 2,800 ft² · Sold $590K · Sep 2026
- 23 Washington St$600K2 bd · 1 ba · 1,855 ft² · Sold $600K · Sep 2026
- 196 New Haven Ave$349K2 bd · 2.5 ba · 1,578 ft² · Sold $349K · Sep 2026
- 50 Orangewood W$316K3 bd · 2.5 ba · 1,280 ft² · Sold $330K · Sep 2026
- 171 Mount Pleasant St$339K3 bd · 1 ba · 1,115 ft² · Sold $337K · Sep 2026
Assigned schools
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