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Single Family ResidenceResidential
$309,713$201 / 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 93How 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
Last sold for $167,500 on Jul 29, 2020

18 ARCH ST

ANSONIA, CT 06401
3
Beds
1
Baths
1,538 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.
1840
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
6
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$310K
$287K low$333K high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$167,500 · Jul 29, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$4,253 (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.$148,960 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$37,380
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$111,580
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$148,960
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$212,800

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.Conventional
CountyNAUGATUCK VALLEY
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1960
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)
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
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
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(11)

Sales and refinances filed with the county for this home. Not every transfer is a normal sale, so check the type before comparing prices.

Foreclosure Filings(1)

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 · 1.6 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

18 Arch 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 88% of homes in Ansonia 06401
  • Costs less per square foot than 91% of homes in Ansonia 06401
  • Has a smaller lot than 93% of homes in Ansonia 06401
  • Among the oldest homes in Ansonia 06401

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
$196K$577K

This home is worth more than 12% 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$309,713
CheaperTypical $384,459Pricier

Pricier than 12% of homes nearby

Price per ft²$201
CheaperTypical $291Pricier

Pricier than 9% of homes nearby

Living area1,538 ft²
SmallerTypical 1,486 ft²Bigger

Bigger than 53% of homes nearby

Lot size0.12 ac
SmallerTypical 0.23 acBigger

Bigger than 7% of homes nearby

Year built1840
OlderTypical 1955Newer

Older than almost all homes nearby

How 18 Arch St ranks against every home in each area.
MeasureThis homeAnsonia 06401Naugatuck Valley County
Estimated valuepricier than$309,71312% of homes27% of homes
Price per ft²pricier than$2019% of homes15% of homes
Living areabigger than1,538 ft²53% of homes53% of homes
Lot sizebigger than0.12 ac7% of homes7% of homes
Year builtnewer than1840almost no homesalmost no homes

About 18 Arch St

How much is 18 Arch St, Ansonia, CT worth?

The TopHap Estimate for 18 Arch St, Ansonia, CT is $309,713 as of Sep 24, 2026. The likely range is $286,669 to $332,757. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Arch St, Ansonia, CT last sell?

18 Arch St, Ansonia, CT last sold on Jul 29, 2020 for $167,500, according to the county's recorded deed. TopHap holds 5 recorded sales for this parcel.

How big is 18 Arch St, Ansonia, CT?

18 Arch St, Ansonia, CT has 3 bedrooms, 1 bathrooms, 1,538 square feet of living space and a 0.12-acre lot.

When was 18 Arch St, Ansonia, CT built?

18 Arch St, Ansonia, CT was built in 1840, making it 186 years old. It is a conventional home. The building has 2 stories.

What schools serve 18 Arch St, Ansonia, CT?

18 Arch 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 18 Arch St, Ansonia, CT compare to other homes in Ansonia 06401?

Among the 5,259 homes in Ansonia 06401, it is worth more than 12% of them ($309,713 against a typical $384,459), its price per square foot is higher than 9% of them ($201 against a typical $291), it is bigger than 53% of them (1,538 ft² against a typical 1,486 ft²), its lot is bigger than 7% of them (0.12 ac against a typical 0.23 ac) and it is newer than almost none of them (1840 against a typical 1955). Measured against all of Naugatuck Valley County, it is worth more than 27% 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 18 Arch St, Ansonia, CT?

The 2025 property tax bill for 18 Arch St, Ansonia, CT was $4,253. The county assessed it at $148,960.

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