Duplex (2 Units, Any Combination)Residential
1 SOUTH ST
COS COB, CT 06807
4
Beds
3
Baths
3,930 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.
0.23 ac
Lot SizeThe size of the land the home sits on, from county records.
1908
Year BuiltThe year the home was originally built, according to county records.
3
StoriesHow many floors the home has above ground.
11
RoomsThe total room count in county records. Counties differ on which rooms they count, so compare it loosely.
Tax & Assessment
Property TaxThe property tax billed for this tax year. It usually pays for schools, roads, and local services.$9,042 (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.$731,640 (2025)
Assessed LandThe share of the county's assessed value that comes from the land itself, not the buildings.$440,510
Assessed ImprovementsThe share of the county's assessed value that comes from the buildings and other structures on the land.$291,130
Previous AssessedThe county's assessed value from the year before, useful for seeing how the assessment changed.$731,640
Assessor Market ValueThe county assessor's own opinion of market value. It is separate from our estimate and updates on the county's schedule.$512,148
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.53
49
FloodProjected flooding risk from rivers, heavy rain, and storm surge, scored 0 to 100. Higher is riskier.
18
WildfireProjected wildfire risk, scored 0 to 100, based on how much land burns in a typical year. Higher is riskier.
63
HeatProjected heat risk, scored 0 to 100, based on how many extremely hot days a year are expected. Higher is riskier.
96
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.
Projected Flood DepthHow deep a serious flood is expected to get here at some point in the next 30 years. Shown in inches.8 in
30-Year Flood ChanceThe chance of at least one serious flood here in the next 30 years, not in any single year.51%
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.Duplex (2 Units, Any Combination)
StyleThe architectural style of the home, such as ranch or colonial.Duplex Single
CountyWESTERN CONNECTICUT
Effective Year BuiltAn adjusted build year that accounts for condition and major remodels. A big renovation can make a home count as newer than it is.1960
Lot (acres)The size of the land the home sits on, from county records.0.23
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
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
Assigned SchoolsThe public schools this address is zoned for. Boundaries change, so confirm with the district before you count on it.
EMH
North Mianus SchoolA
Elementary · Grades KG–5 · 0.7 mi
Eastern Middle SchoolA+
Middle · Grades 6–8 · 2.2 mi
Greenwich High SchoolA+
High · Grades 9–12 · 2.5 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%
Owner Tools
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How this home compares
1 South 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.
- Bigger than 88% of homes in Western Connecticut County
- Has a smaller lot than 78% of homes in Western Connecticut County
- Older than 94% 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.
Living area3,930 ft²
SmallerTypical 2,386 ft²Bigger
Bigger than 87% of homes nearby
Lot size0.23 ac
SmallerTypical 0.29 acBigger
Bigger than 36% of homes nearby
Year built1908
OlderTypical 1964Newer
Newer than 6% of homes nearby
| Measure | This home | Cos Cob 06807 | Western Connecticut County |
|---|---|---|---|
| Living areabigger than | 3,930 ft² | 87% of homes | 88% of homes |
| Lot sizebigger than | 0.23 ac | 36% of homes | 22% of homes |
| Year builtnewer than | 1908 | 6% of homes | 6% of homes |
About 1 South St
When did 1 South St, Cos Cob, CT last sell?
1 South St, Cos Cob, CT last sold on Jan 1, 1900, according to the county's recorded deed.
How big is 1 South St, Cos Cob, CT?
1 South St, Cos Cob, CT has 4 bedrooms, 3 bathrooms, 3,930 square feet of living space and a 0.23-acre lot.
When was 1 South St, Cos Cob, CT built?
1 South St, Cos Cob, CT was built in 1908, making it 118 years old. It is a duplex single home. The building has 3 stories.
What schools serve 1 South St, Cos Cob, CT?
1 South St, Cos Cob, CT is assigned to North Mianus School (elementary), rated A; Eastern 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 1 South St, Cos Cob, CT compare to other homes in Cos Cob 06807?
Among the 2,396 homes in Cos Cob 06807, it is bigger than 87% of them (3,930 ft² against a typical 2,386 ft²), its lot is bigger than 36% of them (0.23 ac against a typical 0.29 ac) and it is newer than 6% of them (1908 against a typical 1964). These shares are recounted nightly from the full county assessor record for each area, not from active listings.
What are the property taxes on 1 South St, Cos Cob, CT?
The 2025 property tax bill for 1 South St, Cos Cob, CT was $9,042. The county assessed it at $731,640.
More homes on South St
Closest homes
- 5 Maple St$1.1M75 ft · 2 bd · 1 ba · 885 ft² · Sold Jan 1900
- 7 Maple St$824K126 ft · 2 bd · 1 ba · 974 ft² · Sold $585K · Sep 2004
- 436 Valley Rd$1.4M105 ft · 2 bd · 2 ba · 2,027 ft² · Sold $600K · May 2015
- 446 Valley Rd$1.4M137 ft · 2 bd · 1.5 ba · 2,127 ft² · Sold $825K · May 2014
- 9 Maple St$695K176 ft · 1 bd · 1 ba · 739 ft² · Sold $570K · Apr 2023
- 2 Maple St$1.6M145 ft · 4 bd · 3.5 ba · 2,474 ft² · Sold $500K · Aug 2012
- 434 Valley Rd$1.3M151 ft · 4 bd · 2.5 ba · 1,895 ft² · Sold $724K · Sep 2007
- 7 Chestnut St$2.5M219 ft · 5 bd · 4.5 ba · 3,856 ft² · Sold $2.1M · Jan 2024
More homes in Cos Cob 06807
- 33 Mead Ave$2.7M4 bd · 4.5 ba · 3,492 ft² · Sold $2.7M · Aug 2026
- 51 Dandy Dr$3.3M4 bd · 3 ba · 3,543 ft² · Sold $3.3M · Aug 2026
- 9 Deluca Dr$2.4M4 bd · 3 ba · 2,620 ft² · Sold $2.4M · Aug 2026
- 4 Cos Cob Ave$1.5M4 bd · 3 ba · 2,720 ft² · Sold $1.5M · Aug 2026
- 86 Dandy Dr$1.9M4 bd · 3.5 ba · 3,546 ft² · Sold $1.9M · Aug 2026
- 12 Old Post Rd$2M4 bd · 2.5 ba · 3,034 ft² · Sold $2M · Aug 2026
- 15 River Rd$914K2 bd · 2 ba · 1,270 ft² · Sold $914K · Aug 2026
- 9 Walnut St0.52 ac · Sold $1.4M · Aug 2026
- 106 Orchard St$2.5M5 bd · 4.5 ba · 2,939 ft² · Sold $2.5M · Jul 2026
- 681 River Rd$2.5M4 bd · 4.5 ba · 3,826 ft² · Sold $2.4M · Jul 2026
- 500 River Rd$1.2M2 bd · 2 ba · 1,830 ft² · Sold $1.2M · Jul 2026
- 14 Pond Pl$3M3 bd · 2.5 ba · 2,082 ft² · Sold $3M · Jul 2026
Assigned schools
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