Beautiful five-bedroom Shingle Style Home set high above the Mianus River, with views of open sky, tree tops and River valley. Spacious floor plan with eat-in gourmet kitchen open to dining room, family room with French doors to large deck and covered outdoor area. Living room lends to patio seating under pergola. Second floor you will find the primary suite with sitting room, ample closet spaces, luxury bath, and screened-in porch with hanging bed. Four addt'l bedrooms, with Jack + Jill bathrooms, round out the second floor. Bonus room on the 3rd flr. Outside you will find a putting green/turf backyard, fire pit + bball hoop. Lower level completes this home with a play space, climbing wall, zip line, as well as office space. Lower level and third floor not included in square footage.
Sold for $4,000,000
$4,000,000
27 Cognewaugh Rd, Cos Cob, CT 06807
5beds
4,916sqft
Residential, Single Family Residence
Built in 2007
0.42 Acres Lot
$4,000,900 Zestimate®
$814/sqft
$7,684 Estimated rent
Home value
$4,000,900
$3.80M - $4.20M
$7,684/mo
Zestimate® history
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Zillow last checked:
Listing updated:
Listed by:
Rebecca Karson 646-361-3672,
Houlihan Lawrence
Bought with:
Elsa Case, RES.0811885
Houlihan Lawrence
Source: Greenwich MLS, Inc.,MLS#: 125198
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 5
- Bathrooms: 5
- Full bathrooms: 4
- 1/2 bathrooms: 1
Heating
- Natural Gas, Forced Air
Cooling
- Central Air
Appliances
- Laundry: Laundry Room
Features
- Eat-in Kitchen, Back Stairs
- Basement: Finished
- Number of fireplaces: 2
Interior area
- Total structure area: 4,916
- Total interior livable area: 4,916 sqft
Property
Parking
- Total spaces: 2
- Parking features: Garage
- Garage spaces: 2
Features
- Patio & porch: Screened, Terrace, Deck
- Exterior features: Putting Green
- Fencing: Fenced
- Has view: Yes
- View description: Winter Waterviews
- Has water view: Yes
- Water view: Winter Waterviews
Lot
- Size: 0.42 Acres
- Features: Hilly
Details
- Parcel number: 081885/S
- Zoning: R-12
Construction
Type & style
- Home type: SingleFamily
- Property subtype: Residential, Single Family Residence
Materials
- Shingle Siding
- Roof: Shake
Condition
- Year built: 2007
Utilities & green energy
- Water: Well
Community & HOA
Location
- Region: Cos Cob
Financial & listing details
- Price per square foot: $814/sqft
- Tax assessed value: $1,727,180
- Annual tax amount: $18,107
- Date on market: 6/11/2026
- Inclusions: Washer/Dryer, All Kitchen Applncs
Price history
| Date | Event | Price |
|---|---|---|
| 7/16/2026 | Sold | $4,000,000+5.3%$814/sqft |
Source:  Greenwich MLS, Inc. #125198 Report a problem | ||
| 6/21/2026 | Listing removed | $20,000$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 6/20/2026 | Pending sale | $3,800,000+0.1%$773/sqft |
Source: Greenwich MLS, Inc. #125198 Report a problem | ||
| 6/11/2026 | Listed for rent | $20,000+5.3%$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 7/21/2025 | Listing removed | $19,000$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 6/27/2025 | Listed for sale | $3,795,000+1126.2%$772/sqft |
Source: Greenwich MLS, Inc. #123136 Report a problem | ||
| 5/28/2025 | Price change | $19,000-5%$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 4/29/2025 | Listed for rent | $20,000$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 7/16/2024 | Listing removed | -- |
Source: Zillow Rentals Report a problem | ||
| 7/13/2024 | Listed for rent | $20,000$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 7/13/2024 | Listing removed | -- |
Source: Zillow Rentals Report a problem | ||
| 6/6/2024 | Listed for rent | $20,000$4/sqft |
Source: Zillow Rentals Report a problem | ||
| 8/4/1998 | Sold | $309,500$63/sqft |
Source: Public Record Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $21,346 +3.5% | $1,727,180 |
| 2024 | $20,616 +2.6% | $1,727,180 |
| 2023 | $20,097 +6.4% | $1,727,180 +5.4% |
| 2022 | $18,897 -6.9% | $1,638,980 -2.8% |
| 2021 | $20,298 +0.2% | $1,685,880 |
| 2020 | $20,264 -1% | $1,685,880 |
| 2019 | $20,467 +2.3% | $1,685,880 |
| 2018 | $20,011 -1.2% | $1,685,880 |
| 2017 | $20,263 +1.6% | $1,685,880 |
| 2016 | $19,942 | $1,685,880 |
Find assessor info on the county website
Neighborhood: Cos Cob
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Nearby schools
GreatSchools rating
- 9/10North Mianus SchoolGrades: K-5Distance: 0.3 mi
- 10/10Eastern Middle SchoolGrades: 6-8Distance: 1.6 mi
- 10/10Greenwich High SchoolGrades: 9-12Distance: 1.9 mi
Schools provided by the listing agent
- Elementary: North Mianus
- Middle: Eastern
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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- Connecticut
- Fairfield County
- Greenwich
- 06807
- Cos Cob
- 27 Cognewaugh Rd
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