OFF MARKET

Off Market May 2022 for $4.2M

$5,338,844

Est. refi paymentEst. refi $27,078/mo

•

6 ba

•

5,929

sq ft

647 River Rd, Cos Cob, CT 06807

About this home

Custom built shingle style residence with a refreshing new take close to schools and town. Sophisticated interiors reveal large sun filled rooms with high, soaring ceilings and crisp white walls. Over-scale windows fill the the home with light & create a tranquil, open feel. Stainless steel kitchen opens to spectacular family room, fp & access to terrace, dining room, perfect for entertaining. Formal living room w/ fp. Master suite with very generous WIC, & stunning Master Bath. Four additional family bedrooms on the second floor, all have en-suite bathrooms. Separate laundry room. Lower level includes media/playroom & gym. 3 car heated garage. Approx 6000 ft of finished space above ground, plus approx 1800 sq. ft in the finished LL.

Single-familyProperty Type

2015Year Built

1.13 acresLot Size

$900Est. Price/Sq.Ft.

3 car garageParking

Listed by Krissy Blake • Sotheby's International Realty

Bought with OUT-OF-TOWN BROKER • FOREIGN LISTING

Source:GMLS #112867

Redfin Estimate

$5,338,844

$1.1M since sold in May 2022$88K since July

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 64.6% higher than the average sale price ($3.24M) of 6 comparable homes.

SOLD JUL 16, 2026
$4,000,000
A
5 beds4.5 baths4,916 sq ft
27 Cognewaugh Rd, Cos Cob, CT 06807
SOLD JUN 29, 2026
$3,525,000
B
5 beds3.5 baths5,213 sq ft
12 Ricki Beth Ln, Old Greenwich, CT 06870
SOLD JUL 16, 2026
$4,802,500
C
5 beds6.5 baths5,426 sq ft
20 Old Wagon Rd, Old Greenwich, CT 06870
SOLD AUG 7, 2026
$1,875,000
D
4 beds4.5 baths4,391 sq ft
37 W Rock Trl, Stamford, CT 06902
SOLD JUN 26, 2026
$3,314,000
E
5 beds4 baths4,777 sq ft
2 Daffodil Ln, Cos Cob, CT 06807
SOLD DEC 10, 2025
$1,950,000
F
5 beds5 baths5,628 sq ft
60 Greenleaf Dr, Stamford, CT 06902

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Earn from this home

Sell

$1,944,310

Est. take-home

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Refinance

Est. cash available

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Rent

$4,593/mo

Redfin rental estimate

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Market trends in 06870, CT

Last updated July 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

108.9%

+2.6% MoM

Median sale price

$2.7M

$508K MoM

Avg. days on market

13d

4 days MoM

Recently sold homes

8 MoM

New listings for sale

OPEN SUN, 1PM TO 3PM
$1,379,000
2 beds2.5 baths1,732 sq ft
115 River Rd #5, Cos Cob, CT 06807
$869,500
2 beds3 baths1,428 sq ft
49 Harold St #2, Cos Cob, CT 06807
$869,500
2 beds3 baths1,428 sq ft
49 Harold St #1, Cos Cob, CT 06807
$1,800,000
3 beds2.5 baths2,550 sq ft
55 Cos Cob Ave, Cos Cob, CT 06807
$1,699,000
4 beds3.5 baths3,120 sq ft
24 Harold St Unit B, Cos Cob, CT 06807
$1,739,000
4 beds6 baths2,856 sq ft
49 Harold St, Cos Cob, CT 06807
See all

Provided by Redfin

Sale history for 647 River Rd

Date

Event

Price

Public Records

May 6, 2022

Sold

$4,200,000

$708/sq ft

GMLS #112867

Dec 6, 2021

Sold

$3,600,000

$607/sq ft

Oct 27, 2021

Pending

—

Oct 1, 2021

Contingent

—

Apr 19, 2021

Listed

$3,750,000

$632/sq ft

+43

Smart MLS #170393867

Dec 6, 2021

Sold

$3,600,000

$607/sq ft

Oct 15, 2021

Contingent

—

Apr 19, 2021

Listed

$3,750,000

$632/sq ft

GMLS #110272

Sep 22, 2020

Delisted

—

Jun 23, 2020

Listed

$3,695,000

$623/sq ft

Smart MLS #99102439

Sep 23, 2015

Sold

$3,300,000

$557/sq ft

Aug 26, 2015

Listing Removed

—

May 1, 2015

Listed

$3,400,000

$573/sq ft

GMLS #93109

Sep 23, 2015

Sold

$3,300,000

$557/sq ft

Apr 28, 2015

Listed

$3,400,000

$573/sq ft

Smart MLS #98518906

Mar 3, 2014

Sold

$1,700,000

$287/sq ft

Oct 26, 2011

Listed

$1,700,000

$287/sq ft

GMLS #80716

Mar 3, 2014

Sold

$1,700,000

$287/sq ft

Oct 24, 2011

Listed

$1,700,000

$287/sq ft

GMLS #80717

Mar 4, 2014

Delisted

—

Oct 24, 2011

Listed

$849,000

$143/sq ft

GMLS #80718

Mar 4, 2014

Delisted

—

Oct 24, 2011

Listed

$699,000

$118/sq ft

GMLS #80719

Mar 4, 2014

Delisted

—

Oct 24, 2011

Listed

$679,000

$115/sq ft

Smart MLS #98518912

Nov 13, 2013

Listing Removed

—

Oct 26, 2011

Listed

$849,000

$143/sq ft

Smart MLS #98518916

Nov 13, 2013

Listing Removed

—

Oct 26, 2011

Listed

$699,000

$118/sq ft

Smart MLS #98518924

Nov 13, 2013

Listing Removed

—

Oct 26, 2011

Listed

$679,000

$115/sq ft

Year

Property tax

Land + Additions

Assessment*

2023

$30,115 (+0.9%)

$758,450 + $1,829,660

$2,588,110

2022

$29,841 (+3.8%)

$758,450 + $1,829,660

$2,588,110

2021

$28,762 (+0.2%)

$650,090 + $1,738,800

$2,388,890

2020

$28,714 (−1.0%)

$650,090 + $1,738,800

$2,388,890

2019

$29,001 (+2.3%)

$650,090 + $1,738,800

$2,388,890

2018

$28,356 (−1.2%)

$650,090 + $1,738,800

$2,388,890

2017

$28,712 (+3.1%)

$650,090 + $1,738,800

$2,388,890

2016

$27,860

$646,520 + $1,708,700

$2,355,220

Tax history for 647 River Rd

Year

Property tax

Land + Additions

Assessment*

2023

$30,115 (+0.9%)

$758,450 + $1,829,660

$2,588,110

2022

$29,841 (+3.8%)

$758,450 + $1,829,660

$2,588,110

2021

$28,762 (+0.2%)

$650,090 + $1,738,800

$2,388,890

2020

$28,714 (−1.0%)

$650,090 + $1,738,800

$2,388,890

2019

$29,001 (+2.3%)

$650,090 + $1,738,800

$2,388,890

2018

$28,356 (−1.2%)

$650,090 + $1,738,800

$2,388,890

2017

$28,712 (+3.1%)

$650,090 + $1,738,800

$2,388,890

2016

$27,860

$646,520 + $1,708,700

$2,355,220

*Taxable value of land and structures on it ("additions") is determined regularly by local assessors and does not affect market price.

Property details

Interior

Basement Information
Basement Sq. Ft: 2,647
Basement Type: Partial

Bathroom Information
# of Full Baths: 5
# of 1/2 Baths: 2

Heating & Cooling
Heating Type: Forced Air

Room Information
# of Rooms: 12

Exterior

Exterior Information
Physical Condition: Excellent
Building Style Type: Colonial
Construction Type: Frame
Exterior Wall: Wood Siding/Shingle
Roof Shape Type: Gable

Property Information
Living Sq. Ft: 5,929
# of Stories: 2

Parking & Garage Information
Parking Type: Attached Garage
Garage / Carport Type: Attached

Lot Information
# of Buildings: 1
Land Sq. Ft: 49,223
Municipality Name: GREENWICH
Acres: 1.13
Zoning Code: RA-1
State Use Description: 1-FAMILY RESIDENCE

Financial

Assessor Information
Assessment Year: 2023

Public facts

Beds: 5
Baths: 6.0
Sq. Ft.: 5,929
Stories: 2.0
Lot Size: 1.13 acres
Style: Single Family Residential
Year Built: 2015
Year Renovated: —
County: Fairfield County
APN: 1858871

Home facts updated by county records on Jul 12, 2023

Around this home

Schools

North Mianus School

Public K-5 • Assigned • 0.7mi

9/10

Eastern Middle School

Public 6-8 • Assigned • 2.2mi

10/10

Greenwich High School

Public 9-12 • Assigned • 2.5mi

10/10

Provided by GreatSchools

Lifestyle

Provided by Walk Score and Local Logic

Climate risks

1/10 Flood Factor

Minimal risk of a flood reaching the building in the next 30 years

1/10 Fire Factor

Unlikely to be in a wildfire in next 30 years

6/10 Heat Factor

7 days above 98° expected this year, 16 days in 30 years

6/10 Wind Factor

67% chance of strong winds in next 30 years

4/10 Air Factor

5 unhealthy days expected this year, 7 days in 30 years

Provided by First Street

Historical weather

Cos Cob, CT • 06807

Average low and high temperatures (°F)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sun exposure

In this area, properties receive around 8.7 hours in June and 4.3 hours in December, placing it below the U.S. average for solar exposure.

8.7 hrs

4.3 hrs

JuneDecember

Provided by Shadowmap

Estimated sale price

$5.07M – $6.14M

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New listings for sale in 06807

OPEN SUN, 1PM TO 3PM

$1,379,000

2 beds2.5 baths1,732 sq ft

115 River Rd #5, Cos Cob, CT 06807

$869,500

2 beds3 baths1,428 sq ft

49 Harold St #2, Cos Cob, CT 06807

$869,500

2 beds3 baths1,428 sq ft

49 Harold St #1, Cos Cob, CT 06807

$1,800,000

3 beds2.5 baths2,550 sq ft

55 Cos Cob Ave, Cos Cob, CT 06807

$1,699,000

4 beds3.5 baths3,120 sq ft

24 Harold St Unit B, Cos Cob, CT 06807

$1,739,000

4 beds6 baths2,856 sq ft

49 Harold St, Cos Cob, CT 06807

Home values near 647 River Rd

Data from public records.

Address	Redfin Estimate
681 River Rd, Cos Cob, CT 4 Beds \| 4.5 Baths \| 3826 Sq. Ft.	$2,724,906
659 River Rd, Cos Cob, CT 5 Beds \| 5.5 Baths \| 5485 Sq. Ft.	$4,132,209

Address	Redfin Estimate
656 River Rd, Cos Cob, CT 3 Beds \| 2 Baths \| 1921 Sq. Ft.	$1,795,277
665 River Rd, Cos Cob, CT 6 Beds \| 4.5 Baths \| 8003 Sq. Ft.	$5,428,081

Address	Redfin Estimate
664 River Rd, Cos Cob, CT 3 Beds \| 2.5 Baths \| 3312 Sq. Ft.	$2,535,364
635 River Rd, Cos Cob, CT 4 Beds \| 3 Baths \| 3057 Sq. Ft.	$2,063,718

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