Skip to content
Skip to content
TopHapOpen in map
Triplex (3 Units, Any Combination)Residential
Last sold for $575,000 on Dec 26, 2025

21 ELM ST

ANSONIA, CT 06401
7
Beds
3
Baths
3,089 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.
0.32 ac
Lot SizeThe size of the land the home sits on, from county records.
1860
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
15
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$575,000 · Dec 26, 2025

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$7,153 (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.$250,530 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$44,870
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$205,660
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$250,530
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$357,900

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Triplex (3 Units, Any Combination)
CountyNAUGATUCK VALLEY
Lot (acres)The size of the land the home sits on, from county records.0.32
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
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, Detached
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(5)

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 · 0.8 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%

Owner Tools

Do you own this home?
Claim this home

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 Elm 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 95% of homes in Ansonia 06401
  • Has a bigger lot than 71% of homes in Ansonia 06401
  • Among the oldest 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 area3,089 ft²
SmallerTypical 1,488 ft²Bigger

Bigger than 95% of homes nearby

Lot size0.32 ac
SmallerTypical 0.24 acBigger

Bigger than 71% of homes nearby

Year built1860
OlderTypical 1955Newer

Older than almost all homes nearby

How 21 Elm St ranks against every home in each area.
MeasureThis homeAnsonia 06401Naugatuck Valley County
Living areabigger than3,089 ft²95% of homes93% of homes
Lot sizebigger than0.32 ac71% of homes41% of homes
Year builtnewer than1860almost no homesalmost no homes

About 21 Elm St

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

21 Elm St, Ansonia, CT last sold on Dec 26, 2025 for $575,000, according to the county's recorded deed. TopHap holds 4 recorded sales for this parcel.

How big is 21 Elm St, Ansonia, CT?

21 Elm St, Ansonia, CT has 7 bedrooms, 3 bathrooms, 3,089 square feet of living space and a 0.32-acre lot.

When was 21 Elm St, Ansonia, CT built?

21 Elm St, Ansonia, CT was built in 1860, making it 166 years old. The building has 2 stories.

What schools serve 21 Elm St, Ansonia, CT?

21 Elm 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 21 Elm St, Ansonia, CT compare to other homes in Ansonia 06401?

Among the 5,259 homes in Ansonia 06401, it is bigger than 95% of them (3,089 ft² against a typical 1,488 ft²), its lot is bigger than 71% of them (0.32 ac against a typical 0.24 ac) and it is newer than almost none of them (1860 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 21 Elm St, Ansonia, CT?

The 2025 property tax bill for 21 Elm St, Ansonia, CT was $7,153. The county assessed it at $250,530.

More homes on Elm St

Closest homes

More homes in Ansonia 06401

Assigned schools

Explore the area

See this home in context

Open 21 Elm St on TopHap’s interactive map to compare it against every sale nearby, overlay school zones and flood risk, and run a CMA.

Open in map
A flyover of TopHap's photorealistic 3D map, with recorded sale prices pinned to homes
Search any address, city, zip, or county…3D$1.9M$6.25MOpen in map