Exceptional opportunity in one of Cos Cob's most desirable neighborhoods! This charming two-family offers incredible versatility for investors, builders, and end users. Renovate the existing multifamily or explore conversion into a beautiful single-family residence. With current rents below market, there is immediate income and significant potential to optimize rental revenue. Buyers considering conversion can collect rent to offset carrying costs while pursuing plans and approvals. Features include hardwood floors, spacious living areas, a large rear deck, private backyard, attached garage, and driveway parking. A rare opportunity to unlock value in a sought-after Cos Cob location!
For sale
$1,495,000
4 Tremont St, Cos Cob, CT 06807
4beds
3baths
1,774sqft
Multi Family
Built in 1915
-- sqft lot
$1,297,100 Zestimate®
$843/sqft
$-- HOA
What's special
- 1 day
- 698
- 28
Zillow last checked:
Listing updated:
Listed by:
Mike Parelli 203-940-2666,
Mike Parelli Real Estate LLC
Source: Greenwich MLS, Inc.,MLS#: 126022
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 3
- Main level bathrooms: 2
- Main level bedrooms: 2
Heating
- Natural Gas, Hot Water
Cooling
- Window Unit(s)
Interior area
- Total structure area: 1,774
- Total interior livable area: 1,774 sqft
Property
Parking
- Total spaces: 3
Lot
- Size: 8,276 Square Feet
Details
- Parcel number: 81501/S
- Zoning: R-7
Construction
Type & style
- Home type: MultiFamily
- Property subtype: Multi Family
Materials
- Shingle Siding
- Roof: Asphalt
Condition
- Year built: 1915
- Major remodel year: 1990
Utilities & green energy
- Water: Public
Community & HOA
Location
- Region: Cos Cob
Financial & listing details
- Price per square foot: $843/sqft
- Tax assessed value: $706,580
- Annual tax amount: $7,408
- Date on market: 10/8/2026
Estimated market value
$1,297,100
$1.17M - $1.44M
$4,938/mo
Price history
| Date | Event | Price |
|---|---|---|
| 10/8/2026 | Listed for sale | $1,495,000$843/sqft |
Source:  Greenwich MLS, Inc. #126022 Report a problem | ||
| 8/29/2023 | Listing removed | -- |
Source: Zillow Rentals Report a problem | ||
| 6/3/2023 | Listed for rent | $3,299+3.1%$2/sqft |
Source: Zillow Rentals Report a problem | ||
| 11/3/2022 | Listing removed | -- |
Source: Zillow Rental Manager Report a problem | ||
| 9/5/2022 | Listed for rent | $3,200$2/sqft |
Source: Zillow Rental Manager Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $7,034 +3.5% | $569,100 |
| 2024 | $6,793 +2.6% | $569,100 |
| 2023 | $6,622 +0.9% | $569,100 |
| 2022 | $6,562 +20.4% | $569,100 +25.8% |
| 2021 | $5,448 +0.2% | $452,480 |
| 2020 | $5,439 -1% | $452,480 |
| 2019 | $5,493 +2.3% | $452,480 |
| 2018 | $5,371 -1.2% | $452,480 |
| 2017 | $5,438 +5.7% | $452,480 +4.9% |
| 2015 | $5,144 +2.6% | $431,340 |
| 2014 | $5,014 +2.8% | $431,340 |
| 2013 | $4,878 +2.8% | $431,340 |
| 2012 | $4,745 +3.4% | $431,340 |
| 2011 | $4,589 -3.6% | $431,340 -18.1% |
| 2010 | $4,762 +3.4% | $526,750 |
| 2009 | $4,604 +3.6% | $526,750 |
| 2008 | $4,446 +3.6% | $526,750 |
| 2007 | $4,293 +3.8% | $526,750 |
| 2006 | $4,135 +2.5% | $526,750 +57.9% |
| 2005 | $4,033 +3.6% | $333,620 |
| 2004 | $3,893 +3.3% | $333,620 |
| 2003 | $3,767 +8% | $333,620 +78.8% |
| 2001 | $3,488 +5.6% | $186,550 |
| 2000 | $3,302 -4.6% | $186,550 |
| 1999 | $3,461 | $186,550 |
Find assessor info on the county website
Monthly payment
Est. payment
Payment breakdown
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Neighborhood: Cos Cob
Nearby schools
Schools provided by the listing agent
- Elementary: Cos Cob
- Middle: Central Middle
Source: Greenwich MLS, Inc.. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
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