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Single Family ResidenceResidential
$327,831$239 / ft²
TopHap EstimateOur estimate of what this home would sell for today, based on nearby sales, the home's size and features, and local price trends. It is a starting point, not an appraisal.· confidence 91How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Sep 24, 2026

21 STATE ST

ANSONIA, CT 06401
2
Beds
1.5
Baths
1,373 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.
0.17 ac
Lot SizeThe size of the land the home sits on, from county records.
1940
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
5
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$328K
$300K low$356K high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,294 (2026)
Assessed ValueThe value the county assigns to this home to calculate property tax. It is often lower than what the home would sell for.$145,740 (2026)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$37,730
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$108,010
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$145,740
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$316,055

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.28 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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyNAUGATUCK VALLEY
Lot (acres)The size of the land the home sits on, from county records.0.17
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.Forced Air With Air Conditioning
FireplaceWhether the home has a fireplace, and what kind.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Attached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(4)

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 SchoolD
Elementary · Grades PK–5 · 1.4 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

21 State 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.

  • Worth less than 81% of homes in Ansonia 06401
  • Costs less per square foot than 78% of homes in Ansonia 06401
  • Has a smaller lot than 84% of homes in Naugatuck Valley County
  • Older than 80% of homes in Naugatuck Valley County

What homes are worth in Ansonia 06401

Each bar is how many homes fall in that price range. The marker is this home.

This home
$197K$577K

This home is worth more than 19% 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.

Estimated value$327,831
CheaperTypical $384,569Pricier

Pricier than 19% of homes nearby

Price per ft²$239
CheaperTypical $291Pricier

Pricier than 22% of homes nearby

Living area1,373 ft²
SmallerTypical 1,488 ft²Bigger

Bigger than 42% of homes nearby

Lot size0.17 ac
SmallerTypical 0.23 acBigger

Bigger than 26% of homes nearby

Year built1940
OlderTypical 1955Newer

Newer than 39% of homes nearby

How 21 State St ranks against every home in each area.
MeasureThis homeAnsonia 06401Naugatuck Valley County
Estimated valuepricier than$327,83119% of homes32% of homes
Price per ft²pricier than$23922% of homes36% of homes
Living areabigger than1,373 ft²42% of homes42% of homes
Lot sizebigger than0.17 ac26% of homes16% of homes
Year builtnewer than194039% of homes20% of homes

About 21 State St

How much is 21 State St, Ansonia, CT worth?

The TopHap Estimate for 21 State St, Ansonia, CT is $327,831 as of Sep 24, 2026. The likely range is $299,710 to $355,952. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 State St, Ansonia, CT last sell?

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

How big is 21 State St, Ansonia, CT?

21 State St, Ansonia, CT has 2 bedrooms, 1.5 bathrooms, 1,373 square feet of living space and a 0.17-acre lot.

When was 21 State St, Ansonia, CT built?

21 State St, Ansonia, CT was built in 1940, making it 86 years old. It is a cape cod home. The building has 2 stories.

What schools serve 21 State St, Ansonia, CT?

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

How does 21 State St, Ansonia, CT compare to other homes in Ansonia 06401?

Among the 5,259 homes in Ansonia 06401, it is worth more than 19% of them ($327,831 against a typical $384,569), its price per square foot is higher than 22% of them ($239 against a typical $291), it is bigger than 42% of them (1,373 ft² against a typical 1,488 ft²), its lot is bigger than 26% of them (0.17 ac against a typical 0.23 ac) and it is newer than 39% of them (1940 against a typical 1955). Measured against all of Naugatuck Valley County, it is worth more than 32% of homes there. These shares are recounted nightly from the full county assessor record for each area, not from active listings.

What are the property taxes on 21 State St, Ansonia, CT?

The 2026 property tax bill for 21 State St, Ansonia, CT was $4,294. The county assessed it at $145,740.

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