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Single Family ResidenceResidential
$1,391,711$493 / 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 Oct 21, 2026

21 TREADWELL AVE

WESTPORT, CT 06880
3
Beds
3.5
Baths
2,821 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.
0.48 ac
Lot SizeThe size of the land the home sits on, from county records.
1950
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

$1.4M
$1.3M low$1.5M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$10,609 (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.$562,500 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$332,900
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$229,600
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$562,500
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$393,750

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
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
15
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
60
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
95
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
43
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.Single Family Residence
StyleThe architectural style of the home, such as ranch or colonial.Cape Cod
CountyWESTERN CONNECTICUT
Lot (acres)The size of the land the home sits on, from county records.0.48
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
PoolWhether the property has a pool, and what kind, such as in-ground.No

Transaction History(3)

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
King's Highway Elementary SchoolA+
Elementary · Grades KG–5 · 0.9 mi
M
Coleytown Middle SchoolA+
Middle · Grades 6–8 · 1.3 mi
H
Staples High SchoolA+
High · Grades 9–12 · 3.3 mi

District: Westport School District

Neighborhood · ZIP 06880These 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.94
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.110
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.82

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.92%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.36%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.5.2%
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.30,681
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,183 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$219,182
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$324,431
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.49 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 Treadwell Ave 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 80% of homes in Westport 06880
  • Costs less per square foot than 98% of homes in Saugatuck
  • Bigger than 73% of homes in Western Connecticut County
  • Has a smaller lot than 72% of homes in Westport 06880
  • Older than 76% of homes in Saugatuck

What homes are worth in Westport 06880

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

This home
$590K$7M

This home is worth more than 20% of homes in Westport 06880.

How it measures up in Westport 06880

The dot is this home. The mark in the middle is the typical home in Westport 06880.

Estimated value$1,391,711
CheaperTypical $2,149,280Pricier

Pricier than 20% of homes nearby

Price per ft²$493
CheaperTypical $726Pricier

Pricier than 7% of homes nearby

Living area2,821 ft²
SmallerTypical 2,910 ft²Bigger

Bigger than 48% of homes nearby

Lot size0.48 ac
SmallerTypical 1 acBigger

Bigger than 28% of homes nearby

Year built1950
OlderTypical 1965Newer

Newer than 25% of homes nearby

How 21 Treadwell Ave ranks against every home in each area.
MeasureThis homeSaugatuckWestport 06880Western Connecticut County
Estimated valuepricier than$1,391,71122% of homes20% of homes74% of homes
Price per ft²pricier than$4932% of homes7% of homes65% of homes
Living areabigger than2,821 ft²49% of homes48% of homes73% of homes
Lot sizebigger than0.48 ac52% of homes28% of homes42% of homes
Year builtnewer than195024% of homes25% of homes25% of homes

About 21 Treadwell Ave

How much is 21 Treadwell Ave, Westport, CT worth?

The TopHap Estimate for 21 Treadwell Ave, Westport, CT is $1,391,711 as of Oct 21, 2026. The likely range is $1,291,602 to $1,491,820. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Treadwell Ave, Westport, CT last sell?

21 Treadwell Ave, Westport, CT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 21 Treadwell Ave, Westport, CT?

21 Treadwell Ave, Westport, CT has 3 bedrooms, 3.5 bathrooms, 2,821 square feet of living space and a 0.48-acre lot.

When was 21 Treadwell Ave, Westport, CT built?

21 Treadwell Ave, Westport, CT was built in 1950, making it 76 years old. It is a cape cod home. The building has 2 stories.

What schools serve 21 Treadwell Ave, Westport, CT?

21 Treadwell Ave, Westport, CT is assigned to King's Highway Elementary School (elementary), rated A+; Coleytown Middle School (middle), rated A+; Staples High School (high), rated A+. All sit in Westport School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 21 Treadwell Ave, Westport, CT compare to other homes in Westport 06880?

Among the 9,793 homes in Westport 06880, it is worth more than 20% of them ($1,391,711 against a typical $2,149,280), its price per square foot is higher than 7% of them ($493 against a typical $726), it is bigger than 48% of them (2,821 ft² against a typical 2,910 ft²), its lot is bigger than 28% of them (0.48 ac against a typical 1 ac) and it is newer than 25% of them (1950 against a typical 1965). Measured against all of Western Connecticut County, it is worth more than 74% 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 Treadwell Ave, Westport, CT?

The 2025 property tax bill for 21 Treadwell Ave, Westport, CT was $10,609. The county assessed it at $562,500.

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