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Duplex (2 Units, Any Combination)Residential

139 PLATT ST

ANSONIA, CT 06401
6
Beds
2
Baths
2,540 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1977
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.
3
ParkingThe number of parking spaces on the property, including the garage.

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,133 (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.$249,830 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$44,240
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$205,590
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$249,830
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$356,900

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.39
1
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.
32
DroughtProjected water shortage risk, scored 0 to 100. Higher means more strain on the local water supply.
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.0.23
ConstructionThe main material the home's frame and walls are built from.Frame (Unspecified)
RoofThe main material covering the roof, such as asphalt shingle or tile.Asphalt
HeatingThe type of heating system in the home.Hot Water
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.No
FeaturesExtra features found in county records. Records are not complete everywhere, so a missing feature does not always mean the home lacks it.Deck

Transaction History(7)

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.

E
Prendergast SchoolC-
Elementary · Grades PK–5 · 0.6 mi

District: Ansonia School District

Neighborhood · ZIP 06401These 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.148
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.94%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.15%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.12%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.1.0%
PopulationHow many people live in this area.19,793
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.3,088 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$70,317
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$88,812
Average tempThe average temperature here across a full year.50°F
Annual precipHow much rain and melted snow falls here in a typical year.51 in
SunshineThe share of daylight hours that get direct sun in a typical year, counting cloud cover.58%

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Data by ATTOM. Valuations are automated estimates, not appraisals. Photos from Google Street View and may not depict the current property state.

How this home compares

139 Platt 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.

  • Bigger than 88% of homes in Ansonia 06401
  • Has a smaller lot than 71% of homes in Naugatuck Valley County
  • Newer than 81% of homes in Ansonia 06401

How it measures up in Ansonia 06401

The dot is this home. The mark in the middle is the typical home in Ansonia 06401.

Living area2,540 ft²
SmallerTypical 1,488 ft²Bigger

Bigger than 88% of homes nearby

Lot size0.23 ac
SmallerTypical 0.23 acBigger

Bigger than 50% of homes nearby

Year built1977
OlderTypical 1955Newer

Newer than 81% of homes nearby

How 139 Platt St ranks against every home in each area.
MeasureThis homeAnsonia 06401Naugatuck Valley County
Living areabigger than2,540 ft²88% of homes85% of homes
Lot sizebigger than0.23 ac50% of homes29% of homes
Year builtnewer than197781% of homes62% of homes

About 139 Platt St

When did 139 Platt St, Ansonia, CT last sell?

139 Platt St, Ansonia, CT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 139 Platt St, Ansonia, CT?

139 Platt St, Ansonia, CT has 6 bedrooms, 2 bathrooms, 2,540 square feet of living space and a 0.23-acre lot.

When was 139 Platt St, Ansonia, CT built?

139 Platt St, Ansonia, CT was built in 1977, making it 49 years old. The building has 2 stories.

What schools serve 139 Platt St, Ansonia, CT?

139 Platt St, Ansonia, CT is assigned to Prendergast School (elementary), rated C-. All sit in Ansonia School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 139 Platt St, Ansonia, CT compare to other homes in Ansonia 06401?

Among the 5,259 homes in Ansonia 06401, it is bigger than 88% of them (2,540 ft² against a typical 1,488 ft²), its lot is bigger than 50% of them (0.23 ac against a typical 0.23 ac) and it is newer than 81% of them (1977 against a typical 1955). These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 139 Platt St, Ansonia, CT?

The 2025 property tax bill for 139 Platt St, Ansonia, CT was $7,133. The county assessed it at $249,830.

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