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CondominiumResidential
$1,304,103$626 / 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 86How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Aug 30, 2026

18 STONE AVE

GREENWICH, CT 06830
Building report
3
Beds
3.5
Baths
2,082 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.
2012
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
8
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
2
ParkingThe number of parking spaces on the property, including the garage.

Valuation

$1.3M
$1.1M low$1.5M high

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,503 (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.$526,190 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$526,190
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$526,190
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$368,333

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.43
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.
65
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
94
StormProjected risk from heavy rainstorms, scored 0 to 100, based on how often extreme rainfall is expected. Higher is riskier.
49
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.Condominium
CountyWESTERN CONNECTICUT
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
CoolingThe type of cooling or air conditioning in the home.Yes
GarageWhether the property has a garage, and details like whether it is attached to the home.Garage, Basement
PoolWhether the property has a pool, and what kind, such as in-ground.No

Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.

E
Hamilton Avenue SchoolB-
Elementary · Grades PK–5 · 0.1 mi
M
Western Middle SchoolA
Middle · Grades 6–8 · 0.7 mi
H
Greenwich High SchoolA+
High · Grades 9–12 · 2.1 mi

District: Greenwich School District

Neighborhood · ZIP 06830These 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.110
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.119
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.104

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.90%
Bachelor's or higherThe share of adults 25 and older whose highest degree is a bachelor's degree.30%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.7.6%
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.27,704
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.1,501 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$168,325
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$273,728
Average tempThe average temperature here across a full year.52°F
Annual precipHow much rain and melted snow falls here in a typical year.50 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 Stone 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 Greenwich 06830
  • Costs less per square foot than 89% of homes in Greenwich 06830
  • Smaller than 69% of homes in Greenwich 06830
  • Newer than 95% of homes in Western Connecticut County

What homes are worth in Greenwich 06830

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

This home
$674K$10M

This home is worth more than 20% of homes in Greenwich 06830.

How it measures up in Greenwich 06830

The dot is this home. The mark in the middle is the typical home in Greenwich 06830.

Estimated value$1,304,103
CheaperTypical $3,045,147Pricier

Pricier than 20% of homes nearby

Price per ft²$626
CheaperTypical $916Pricier

Pricier than 11% of homes nearby

Living area2,082 ft²
SmallerTypical 2,895 ft²Bigger

Bigger than 31% of homes nearby

Year built2012
OlderTypical 1956Newer

Newer than 93% of homes nearby

How 18 Stone Ave ranks against every home in each area.
MeasureThis homeGreenwich 06830Western Connecticut County
Estimated valuepricier than$1,304,10320% of homes72% of homes
Price per ft²pricier than$62611% of homes79% of homes
Living areabigger than2,082 ft²31% of homes54% of homes
Year builtnewer than201293% of homes95% of homes

About 18 Stone Ave

How much is 18 Stone Ave, Greenwich, CT worth?

The TopHap Estimate for 18 Stone Ave, Greenwich, CT is $1,304,103 as of Aug 30, 2026. The likely range is $1,120,035 to $1,488,171. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 18 Stone Ave, Greenwich, CT last sell?

18 Stone Ave, Greenwich, CT last sold on Jan 1, 1900, according to the county's recorded deed.

How big is 18 Stone Ave, Greenwich, CT?

18 Stone Ave, Greenwich, CT has 3 bedrooms, 3.5 bathrooms and 2,082 square feet of living space.

When was 18 Stone Ave, Greenwich, CT built?

18 Stone Ave, Greenwich, CT was built in 2012, making it 14 years old. The building has 2 stories.

What schools serve 18 Stone Ave, Greenwich, CT?

18 Stone Ave, Greenwich, CT is assigned to Hamilton Avenue School (elementary), rated B-; Western Middle School (middle), rated A; Greenwich High School (high), rated A+. All sit in Greenwich School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 18 Stone Ave, Greenwich, CT compare to other homes in Greenwich 06830?

Among the 6,738 homes in Greenwich 06830, it is worth more than 20% of them ($1,304,103 against a typical $3,045,147), its price per square foot is higher than 11% of them ($626 against a typical $916), it is bigger than 31% of them (2,082 ft² against a typical 2,895 ft²) and it is newer than 93% of them (2012 against a typical 1956). Measured against all of Western Connecticut County, it is worth more than 72% 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 Stone Ave, Greenwich, CT?

The 2025 property tax bill for 18 Stone Ave, Greenwich, CT was $6,503. The county assessed it at $526,190.

More homes on Stone Ave

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Assigned schools

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