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CondominiumResidential
$1,027,429$809 / 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 92How well the pricing models agreed with each other on this home. Higher means the estimate rests on stronger, more consistent data.· as of Jul 14, 2026
Last sold for $542,500 on Jun 1, 2010

11 RIVER RD

COS COB, CT 06807
Building report
2
Beds
1.5
Baths
1,270 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.
1979
Year BuiltThe year the home was originally built, according to county records.
2
StoriesHow many floors the home has above ground.
4
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.

Valuation

$1M
$948K low$1.1M high
Last SaleThe most recent sale price and date from the recorded deed. Transfers between family members or companies may not reflect market value.$542,500 · Jun 1, 2010
Est. Owner EquityRoughly how much of the home's value the owner would keep after paying off known loans. It is our estimate minus the loans still owed.$697,429
Est. Lendable EquityThe part of the owner's equity a lender would typically let them borrow against — about 80% of their equity.$557,943
Loan-to-ValueHow much is still owed on the home compared to what it is worth. 80% means loans equal 80% of our estimate, so it shifts when the estimate does.30%
1st MortgageA loan still believed to be open on this home, in the order lenders get repaid. The first position is paid back before the second.$330,000
HOME POINT FINANCIAL CORPORATION · recorded Dec 15, 2020

Tax & Assessment

Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$6,525 (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.$527,940 (2025)
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$527,940
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$527,940
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$369,558

Climate Risk

Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.78 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.62%
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.1 percent flood zone

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.Hot Water
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(1)

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
Cos Cob SchoolB
Elementary · Grades KG–5 · 0.4 mi
H
Greenwich High SchoolA+
High · Grades 9–12 · 1.0 mi
M
Central Middle SchoolA-
Middle · Grades 6–8 · 1.1 mi

District: Greenwich School District

Neighborhood · ZIP 06807These 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.54
Air pollutionOverall air pollution compared with the rest of the country, where 100 is average. Lower is cleaner.112
EarthquakeEarthquake risk and likely building damage compared with the rest of the country, where 100 is average. Scores can run far above 100.103

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.34%
Poverty rateThe share of people whose household income falls below the federal poverty line, which varies by family size.6.3%
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.7,630
DensityPeople per square mile. Higher numbers mean a more crowded, urban area.2,321 / mi²
Median incomeThe middle household income here — half of households earn more, half earn less.$180,144
Average incomeThe average household income. It runs higher than the median when a few high earners pull it up.$235,340
Average tempThe average temperature here across a full year.52°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%

Ownership

OccupancyWhether the owner appears to live here or somewhere else. It is inferred from the mailing address on record.Absentee owner
Company ownedWhether the owner is a company or trust rather than a person.No

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

11 River Rd 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 90% of homes in Cos Cob 06807
  • Costs more per square foot than 90% of homes in Western Connecticut County
  • Smaller than 92% of homes in Cos Cob 06807
  • Newer than 75% of homes in Cos Cob 06807

What homes are worth in Cos Cob 06807

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

This home
$680K$4.3M

This home is worth more than 10% of homes in Cos Cob 06807.

How it measures up in Cos Cob 06807

The dot is this home. The mark in the middle is the typical home in Cos Cob 06807.

Estimated value$1,027,429
CheaperTypical $1,770,896Pricier

Pricier than 10% of homes nearby

Price per ft²$809
CheaperTypical $741Pricier

Pricier than 65% of homes nearby

Living area1,270 ft²
SmallerTypical 2,388 ft²Bigger

Bigger than 8% of homes nearby

Year built1979
OlderTypical 1964Newer

Newer than 75% of homes nearby

How 11 River Rd ranks against every home in each area.
MeasureThis homeCos Cob 06807Western Connecticut County
Estimated valuepricier than$1,027,42910% of homes63% of homes
Price per ft²pricier than$80965% of homes90% of homes
Living areabigger than1,270 ft²8% of homes22% of homes
Year builtnewer than197975% of homes68% of homes

About 11 River Rd

How much is 11 River Rd, Cos Cob, CT worth?

The TopHap Estimate for 11 River Rd, Cos Cob, CT is $1,027,429 as of Jul 14, 2026. The likely range is $948,408 to $1,106,450. The estimate is modelled from recorded sales, assessments and the property's own characteristics — it is not an appraisal.

When did 11 River Rd, Cos Cob, CT last sell?

11 River Rd, Cos Cob, CT last sold on Jun 1, 2010 for $542,500, according to the county's recorded deed.

How big is 11 River Rd, Cos Cob, CT?

11 River Rd, Cos Cob, CT has 2 bedrooms, 1.5 bathrooms and 1,270 square feet of living space.

When was 11 River Rd, Cos Cob, CT built?

11 River Rd, Cos Cob, CT was built in 1979, making it 47 years old. The building has 2 stories.

What schools serve 11 River Rd, Cos Cob, CT?

11 River Rd, Cos Cob, CT is assigned to Cos Cob School (elementary), rated B; Greenwich High School (high), rated A+; Central Middle School (middle), rated A-. All sit in Greenwich School District. Attendance boundaries change — confirm with the district before relying on an assignment.

How does 11 River Rd, Cos Cob, CT compare to other homes in Cos Cob 06807?

Among the 2,396 homes in Cos Cob 06807, it is worth more than 10% of them ($1,027,429 against a typical $1,770,896), its price per square foot is higher than 65% of them ($809 against a typical $741), it is bigger than 8% of them (1,270 ft² against a typical 2,388 ft²) and it is newer than 75% of them (1979 against a typical 1964). Measured against all of Western Connecticut County, it is worth more than 63% 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 11 River Rd, Cos Cob, CT?

The 2025 property tax bill for 11 River Rd, Cos Cob, CT was $6,525. The county assessed it at $527,940.

Closest homes

More homes in Cos Cob 06807

Assigned schools

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See this home in context

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