Commercial Real Estate Market in Cos Cob, CT
Updated monthly: sale, lease, property records, location trend, and more… · Last update: August 31
2 active listings and 60 off-market properties in Cos Cob, CT.
Market Trends
Cos Cob, CT spans 3.3 square miles in Fairfield County, Connecticut. Figures below refresh monthly; last updated 31 August 2026.
Office
Office space in Cos Cob, CT asks $187/SF to buy. Vacancy runs 19.9% across the Northeast region in 2025, up from 13.1% in 2019.
Average Sale Price $/SF
Listings
Vacancy Rate % in Northeast region
Retail
Retail space in Cos Cob, CT asks $189/SF to buy. Vacancy runs 6% across the Northeast region in 2025, little changed from 6% in 2019. Down from a 2020 peak of 7.1%.
Average Sale Price $/SF
Listings
Vacancy Rate % in Northeast region
Industrial
Industrial vacancy in Cos Cob, CT runs 7.6% across the Northeast region in 2025, up from 5.4% in 2019. Nearly 2.4x the 2021 low of 3.2%.
Vacancy Rate % in Northeast region
Multifamily
Multifamily space in Cos Cob, CT asks $229/SF to buy. Vacancy runs 5.6% across the Northeast region in 2025, up from 4% in 2022.
Average Sale Price $/SF
Listings
Vacancy Rate % in Northeast region
Market overview
Demographics & Economy
Cos Cob, CT has 7,197 residents in 2,881 households. Density runs 2,198 people per square mile. Median household income here is $194,492 and median gross rent $2,622 a month.
7,197
Population
2,881
Households
2.5
Avg Household Size
43
Median Age
73%
College-Educated
96%
High-School Grad
3.3 sq mi
ZIP Area
2,198
Density / Sq Mi
$194,492
Median Household Income
$95,777
Median Earnings
$2,622
Median Rent
$1,228,000
Median Home Value
Tools
Nearby Markets
| Market | Average Sale Price, $/SF | Average Lease Price, $/SF/Yr |
|---|---|---|
| Greenwich | — | $29.80 |
| Riverside | — | — |
| Stamford | — | $29.85 |
| Old Greenwich | — | — |
Frequently Asked Questions
How much does it cost to lease commercial space in Cos Cob?
Asking lease rates in Cos Cob, CT average $46.00 per square foot per year.
Where does Realmo's Cos Cob market data come from?
Realmo compiles Cos Cob, CT figures from 1 active sale listings, 1 active lease listings, 60 tracked off-market properties. Sale and lease figures refresh monthly; vacancy annually. Last updated 31 August 2026.
Methodology & data sources
- Asking prices and averages
- Computed from 1 active for-sale and 1 active for-lease listings in Cos Cob, CT. These are ASKING figures from live listings, not closed-transaction prices, and a segment carried by a handful of listings reads as indicative rather than an average.
- Vacancy rates
- Published per-sector market series, taken at the metro level where one exists and otherwise at the Census-region level — a chart reading "in <region> region" is a regional number, not this city's.
- Refresh
- The monthly aggregates close at the end of the previous month, so 31 August 2026 — not today — is the honest last update.
- Known limitations
- office vacancy is reported at Northeast region level, retail vacancy is reported at Northeast region level and industrial vacancy is reported at Northeast region level.
- Coverage
- Metrics below the 10-observation threshold fall back one geographic level. The geography used is named on each figure.
Compiled by the Realmo Data team · reviewed 31 August 2026 · report a data issue
