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CT area data

Cos cob, CT

Cos cob, CT.

Population: 7,650 (Census ACS)

The median home value in Cos cob, CT is $1.88M — up 14.2% over the past year. Homes sell for a median $1.89M after a median 20 days on market. Typical rent runs $7,396/month. 1 schools serve the area (NCES). Cost of living is 7.0% above the US average (BEA, metro/state-level).

Backed by 25+ public sourcesFEMA · U.S. Census · NOAA · Dept. of Education · EPA · and more

$1.88M

Median home value

+14.2%

1-year change

20

Median days on market

Home values & appreciation

Median home value
$1.88M
1-year appreciation
+14.2%
3-year appreciation
+27.2%
5-year appreciation
+48.6%
10-year appreciation
+65.9%
All-time peak (2026-07)
$1.88M
House Price Index (state)
307.7 (+3.7% YoY)

Sources: home value index (ZIP-level) · FHFA House Price Index (state-level)

Market activity

Median sale price
$1.89M
Median list price
$2.20M
Median price per sqft
$797
1-year sale-price change
-4.2%
Median days on market
20 days
Homes sold (recent period)
10
For-sale inventory
22
Sale-to-list ratio
104.9%
Active listings
3
1-year forecast
+4.0%
New listings (monthly)
9

Source: recent area sales and market data (ZIP-level)

Rents

Typical rent
$7,396/mo
Studio fair-market rent
$1,207/mo
1BR fair-market rent
$1,508/mo
2BR fair-market rent
$1,877/mo
3BR fair-market rent
$2,441/mo
4BR fair-market rent
$2,816/mo

Sources: market rent index (ZIP-level) · HUD Fair Market Rents (metro/county-level, 40th-percentile regulatory reference)

Affordability

Cost of living index (Above Average)
107.0 (100 = US avg)
Electricity rate (state-level)
29.4¢/kWh
Natural gas rate (state-level)
$16.80/MCF
30-year mortgage rate (national)
6.66%
15-year mortgage rate (national)
6.00%

Sources: BEA Regional Price Parities (metro/state-level) · EIA energy rates (state-level) · Freddie Mac PMMS (national)

Schools

Total schools
1
Elementary schools
1
Middle schools
0
High schools
0
Schools include
Cos Cob School

Source: NCES school directory, 2022-23 (school-address-based)

Natural hazards & flood risk

FEMA flood zone
AE
Flood risk level
High
Radon potential (county)
High radon potential — EPA Zone 1 of 3
EPA Superfund (NPL) sites within 5 mi
None
Nearest Superfund site
Kellogg-Deering Well Field (9.8 mi)
EPA recommends radon testing for every home regardless of zone.

Sources: FEMA National Risk Index (county-level) · FEMA flood data (ZIP-level) · USDA Forest Service Wildfire Risk to Communities (county-level) · EPA radon zones + Superfund NPL

Climate (30-year normals)

Annual precipitation
50.8 in
USDA plant hardiness zone
7a (extreme annual low 0 to 5°F)

Sources: NOAA Climate Normals (30-year, nearest-station) · USDA Plant Hardiness Zone Map (2023)

Air quality

Air quality rating
Good
Median AQI (annual)
46
Days with Good air quality
210
Days with Moderate air quality
135
Days with Unhealthy air quality
7
Highest AQI recorded (year)
242

Source: EPA air quality data (nearest monitoring station, annual)

Walkability & transit

Walkability index
6.5 / 20
Transit service frequency
-99,999
Jobs reachable by car (30 min)
144,318
Jobs reachable by transit (45 min)
125,739

Source: EPA Smart Location Database (metropolitan block groups)

Amenities

National parks within ~60 mi
23
Nearest national park
Sagamore Hill National Historic Site (13 mi)
National parks include
Sagamore Hill National Historic Site, Weir Farm National Historical Park, Saint Paul's Church National Historic Site
Airports within 30 mi
7
Nearest airport
Westchester County Airport (HPN) (6 mi)
Nearest major airport
Westchester County Airport (HPN) (6 mi)
Hospitals nearby (~15 mi)
25
Hospitals include
GREENWICH HOSPITAL ASSOCIATION -, SILVER HILL HOSPITAL INC, ST JOSEPH'S MEDICAL CENTER
Avg hospital rating (CMS)
3.0 / 5
Best hospital rating nearby (CMS)
5.0 / 5
EV charging stations (within 10 mi)
171
Solar radiation rating
Fair (4.0 kWh/m²/day)

Sources: National Park Service · FAA airport data · CMS hospital data · DOE/NREL (proximity-based)

Housing stock

Median year housing built
1,964
Housing built before 1970
56.7%
Housing built 2000 or later
13.9%
Median annual property tax
$8,652
Mean commute to work
21 min
Households with broadband internet
92.5%

Source: Census ACS 5-year estimates (ZIP-level)

How it compares

Cos cobState medianUS median
Median home value$1.88M$447,200$289,727
Median sale price$1.89M$450,000$325,000
Median days on market20 days39 days51 days
Typical rent$7,396/mo$2,213/mo$1,808/mo
Median annual property tax$8,652$6,234$2,006

State and US medians are computed across all US ZIP codes with sufficient public-data coverage, from the same sources as the figures above.

Area data compiled from public government, academic, and industry research feeds. Data sources →

Common questions

What is the median home value in Cos cob, CT?
$1.88M.
What is the median sale price in Cos cob, CT?
$1.89M.
How long do homes take to sell in Cos cob, CT?
Median days on market: 20 days.
What is typical rent in Cos cob, CT?
Typical rent: $7,396/month.
Is Cos cob, CT in a flood zone?
High (FEMA NFIP). FEMA flood zone AE.
What is the radon potential in Cos cob, CT?
High radon potential — EPA Zone 1 of 3, county-level. EPA recommends testing every home regardless of zone.
Are there Superfund sites near Cos cob, CT?
No current or proposed National Priorities List sites within 5 miles (EPA).
How many schools serve Cos cob, CT?
1 schools (1 elementary) (NCES, 2022-23).
Is Cos cob, CT walkable?
Walkability index: 6.5/20 (EPA Smart Location Database).
What is the air quality in Cos cob, CT?
Good. Median AQI: 46. (EPA AQI).
What is the cost of living in Cos cob, CT?
Regional Price Parity: 107.0 (100 = US average) (Above Average) (BEA RPP, metro/state-level).

ZIP code for Cos cob

Selling a home in Cos cob, CT?

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Data last updated

Most recent source refresh: Sep 2026. See all data sources →

Data compiled by REAIGENT7 — AI listing platform for real estate agents