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Single Family ResidenceResidential
$1,736,672$485 / 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 84How 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 $1,725,000 on Aug 9, 2024

10 CIRCLE AVE

GROTON, CT 06340
5
Beds
4.5
Baths
3,581 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.
0.36 ac
Lot SizeThe size of the land the home sits on, from county records.
1899
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
10
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1.7M
$1.5M low$2M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$1,725,000 · Aug 9, 2024

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$27,427 (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.$948,710 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$451,850
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$496,860
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$948,710
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$664,097

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.30
1
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
6
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
48
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
80
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
16
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
CountySOUTHEASTERN CONNECTICUT
Lot (acres)The size of the land the home sits on, from county records.0.36
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
CoolingThe type of cooling or air conditioning in the home.Yes
FireplaceWhether the home has a fireplace, and what kind.Yes
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(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
Catherine Kolnaski STEAM Magnet SchoolB+
Elementary · Grades PK–5 · 0.6 mi
M
Groton Middle SchoolC
Middle · Grades 6–8 · 2.8 mi
H
Robert E. Fitch High SchoolC
High · Grades 9–12 · 2.9 mi

District: Groton School District

Neighborhood · ZIP 06340These 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.104
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.109
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.56

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.91%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.23%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.9.6%
UnemploymentThe share of men 16 and older who are out of work and actively looking. Only men are counted in this figure.0.8%
PopulationHow many people live in this area.27,657
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.992 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$80,998
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$95,942
Average tempThe average temperature here across a full year.51°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.56%

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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

10 Circle 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.

  • Among the most valuable homes in Southeastern Connecticut County
  • Costs more per square foot than 96% of homes in Southeastern Connecticut County
  • Bigger than 98% of homes in Groton 06340
  • Has a bigger lot than 67% of homes in Groton 06340
  • Older than 93% of homes in Groton 06340

What homes are worth in Groton 06340

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

This home
$188K$2.1M

This home is worth more than 96% of homes in Groton 06340.

How it measures up in Groton 06340

The dot is this home. The mark in the middle is the typical home in Groton 06340.

Estimated value$1,736,672
CheaperTypical $386,997Pricier

Pricier than 96% of homes nearby

Price per ft²$485
CheaperTypical $289Pricier

Pricier than 86% of homes nearby

Living area3,581 ft²
SmallerTypical 1,416 ft²Bigger

Bigger than 98% of homes nearby

Lot size0.36 ac
SmallerTypical 0.28 acBigger

Bigger than 67% of homes nearby

Year built1899
OlderTypical 1960Newer

Newer than 7% of homes nearby

How 10 Circle Ave ranks against every home in each area.
MeasureThis homeGroton 06340Southeastern Connecticut County
Estimated valuepricier than$1,736,67296% of homesalmost all homes
Price per ft²pricier than$48586% of homes96% of homes
Living areabigger than3,581 ft²98% of homes98% of homes
Lot sizebigger than0.36 ac67% of homes37% of homes
Year builtnewer than18997% of homes8% of homes

About 10 Circle Ave

How much is 10 Circle Ave, Groton, CT worth?

The TopHap Estimate for 10 Circle Ave, Groton, CT is $1,736,672 as of Sep 24, 2026. The likely range is $1,455,189 to $2,018,155. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 10 Circle Ave, Groton, CT last sell?

10 Circle Ave, Groton, CT last sold on Aug 9, 2024 for $1,725,000, according to the county's recorded deed. TopHap holds 2 recorded sales for this parcel.

How big is 10 Circle Ave, Groton, CT?

10 Circle Ave, Groton, CT has 5 bedrooms, 4.5 bathrooms, 3,581 square feet of living space and a 0.36-acre lot.

When was 10 Circle Ave, Groton, CT built?

10 Circle Ave, Groton, CT was built in 1899, making it 127 years old. The building has 2 stories.

What schools serve 10 Circle Ave, Groton, CT?

10 Circle Ave, Groton, CT is assigned to Catherine Kolnaski STEAM Magnet School (elementary), rated B+; Groton Middle School (middle), rated C; Robert E. Fitch High School (high), rated C. All sit in Groton School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 10 Circle Ave, Groton, CT compare to other homes in Groton 06340?

Among the 7,236 homes in Groton 06340, it is worth more than 96% of them ($1,736,672 against a typical $386,997), its price per square foot is higher than 86% of them ($485 against a typical $289), it is bigger than 98% of them (3,581 ft² against a typical 1,416 ft²), its lot is bigger than 67% of them (0.36 ac against a typical 0.28 ac) and it is newer than 7% of them (1899 against a typical 1960). Measured against all of Southeastern Connecticut County, it is worth more than almost all 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 10 Circle Ave, Groton, CT?

The 2025 property tax bill for 10 Circle Ave, Groton, CT was $27,427. The county assessed it at $948,710.

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