Total monthly cost of ownership
Cost to Own a Home in Cos Cob, Connecticut
A $1,150,000 home here costs
$8,278per month, all in — with 20% down at today's 6.66% 30-year fixed rate.
A standard mortgage calculator would have told you $5,912. The real number is $2,366 higher every month — 40% more than the payment most buyers budget for.
Where every dollar goes
Only the first line is a mortgage payment. Change any assumption above and every figure below recalculates.
Cos Cob against Western Connecticut Planning Region and Connecticut
| Measure | Cos Cob | Western Connecticut Planning Region |
|---|---|---|
| Median home value | $1,149,500 | $625,400 |
| Median property tax | $7,987 | $9,222 |
| Effective tax rate | 0.695% | 1.475% |
| Median gross rent | $2,574 | $2,060 |
| Population | 7,354 | 621,232 |
The weather behind that power bill
Cos Cob sits in Western Connecticut Planning Region, which averages a high of 82.4°F in its hottest month and a low of 18.1°F in its coldest, with 48.03" of precipitation a year and 29% of it in a single three-month stretch. That climate drives 594 cooling and 6,158 heating degree days, which is what sets the $246 electricity line above.
See the full climate breakdown for Western Connecticut Planning Region — month by month temperatures, rainy season timing, snowfall and heating and cooling costs.
Other cities in Western Connecticut Planning Region
Full Western Connecticut Planning Region cost breakdown · Every county in Connecticut
Common questions
How much does it cost to own a home in Cos Cob?
A $1,150,000 home in Cos Cob, Connecticut costs approximately $8,278 per month with 20% down at 6.66%. That is $5,912 principal and interest, $666 property tax, $427 homeowners insurance, $314 utilities and $958 set aside for maintenance.
What is the property tax rate in Cos Cob?
Cos Cob has an effective property tax rate of 0.695%, based on a median home value of $1,149,500 and median real estate taxes of $7,987. That is lower than the Western Connecticut Planning Region average of 1.475%.
What is the average home price in Cos Cob?
The median owner-occupied home value in Cos Cob, Connecticut is $1,149,500, against $625,400 across Western Connecticut Planning Region.
Is it cheaper to rent or buy in Cos Cob?
Median gross rent in Cos Cob is $2,574 a month, against $8,278 to own the median home all in. Renting costs less month to month here, though renting builds no equity.
Sources & methodology
- Median home value, real estate taxes, gross rent and population for Cos Cob — US Census Bureau, American Community Survey ACS 2023 5-Year, place-level tables.
- Homeowners insurance — NAIC average premium for Connecticut.
- Electricity price — EIA Electric Power Monthly Table 5.6.A.
- Mortgage rate — Freddie Mac PMMS, refreshed weekly.
- Maintenance (1%/yr) and water and sewer ($68/mo) are national estimates. Every assumption above is editable.