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CondominiumResidential
$1,434,543$474 / 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 95How 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 $885,000 on Jun 10, 2008

21 KIRBY ST

GREENWICH, CT 06830
4
Beds
4.5
Baths
3,028 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.
2007
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
9
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

$1.4M
$1.4M low$1.5M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$885,000 · Jun 10, 2008

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$8,041 (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.$650,580 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$650,580
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$650,580
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$455,406

Property Facts

Property TypeThe broad category the county puts this property in, such as residential or commercial.Condominium
StyleThe architectural style of the home, such as ranch or colonial.Condo/Apartment
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

Transaction History(2)

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
New Lebanon SchoolA-
Elementary · Grades PK–5 · 0.1 mi
M
Western Middle SchoolA
Middle · Grades 6–8 · 0.8 mi
H
Greenwich High SchoolA+
High · Grades 9–12 · 3.6 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%

Owner Tools

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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 Kirby 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 77% of homes in Greenwich 06830
  • Among the lowest price per square foot in Greenwich 06830
  • Bigger than 77% of homes in Western Connecticut County
  • Newer than 94% 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
$625K$10M

This home is worth more than 23% 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$1,434,543
CheaperTypical $3,020,757Pricier

Pricier than 23% of homes nearby

Price per ft²$474
CheaperTypical $919Pricier

Cheaper than almost all homes nearby

Living area3,028 ft²
SmallerTypical 2,891 ft²Bigger

Bigger than 53% of homes nearby

Year built2007
OlderTypical 1956Newer

Newer than 91% of homes nearby

How 21 Kirby St ranks against every home in each area.
MeasureThis homeGreenwich 06830Western Connecticut County
Estimated valuepricier than$1,434,54323% of homes75% of homes
Price per ft²pricier than$474almost no homes62% of homes
Living areabigger than3,028 ft²53% of homes77% of homes
Year builtnewer than200791% of homes94% of homes

About 21 Kirby St

How much is 21 Kirby St, Greenwich, CT worth?

The TopHap Estimate for 21 Kirby St, Greenwich, CT is $1,434,543 as of Sep 24, 2026. The likely range is $1,362,139 to $1,506,947. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 21 Kirby St, Greenwich, CT last sell?

21 Kirby St, Greenwich, CT last sold on Jun 10, 2008 for $885,000, according to the county's recorded deed.

How big is 21 Kirby St, Greenwich, CT?

21 Kirby St, Greenwich, CT has 4 bedrooms, 4.5 bathrooms and 3,028 square feet of living space.

When was 21 Kirby St, Greenwich, CT built?

21 Kirby St, Greenwich, CT was built in 2007, making it 19 years old. It is a condo/apartment home. The building has 2 stories.

What schools serve 21 Kirby St, Greenwich, CT?

21 Kirby St, Greenwich, CT is assigned to New Lebanon School (elementary), rated A-; 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 21 Kirby St, Greenwich, CT compare to other homes in Greenwich 06830?

Among the 6,738 homes in Greenwich 06830, it is worth more than 23% of them ($1,434,543 against a typical $3,020,757), its price per square foot is higher than almost none of them ($474 against a typical $919), it is bigger than 53% of them (3,028 ft² against a typical 2,891 ft²) and it is newer than 91% of them (2007 against a typical 1956). Measured against all of Western Connecticut County, it is worth more than 75% 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 Kirby St, Greenwich, CT?

The 2025 property tax bill for 21 Kirby St, Greenwich, CT was $8,041. The county assessed it at $650,580.

More homes on Kirby St

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Assigned schools

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