Off Market Aug 2021 for $3.5M

$5,428,081

Est. refi paymentEst. refi $20,409/mo

•

8,003

sq ft

665 River Rd, Cos Cob, CT 06807

About this home

BIG PRICE RECUCTION ! Grab your swimsuit and tennis racket ! This chic contemporary home was designed with soaring ceilings and walls of windows for a seamless connection to the private three+ acre retreat with a pool & spa and an all weather tennis court. Clean lines, sleek custom cabinetry, natural materials and thoughtful architectural details, plus an open floor plan of connected spaces provides flexibility for everyday family living and entertaining. A wall of custom folding doors open from the gourmet kitchen & dining area to the outdoor terraces and spectacular views of the property. The primary suite includes a private balcony, plus there are 5 additional bedrooms and 4.1 baths. Several flexible-use spaces offer work and learn from home areas. Professionally designed landscaping include formal perennial gardens, nature trails, and a serene pond w/waterfall. NEW roof, HVAC & driveway all in 2021. National Blue Ribbon awarded North Mianus Elementary School. Private location close to both Greenwich Avenue and Old Greenwich Village shopping and restaurants, plus parks & Town beaches. A special property in Greenwich perfect for year round or weekend living.

Single-familyProperty Type

1999Year Built

3.36 acresLot Size

$678Est. Price/Sq.Ft.

2 car garageParking

Listed by Karen Scrivanos Oztemel • Berkshire Hathaway NE Prop.

Bought with Meredith Cohen • Keller Williams Realty

Source:Smart MLS #170399062

Redfin Estimate

$5,428,081

$1.9M since sold in August 2021$579K since July

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 104.9% higher than the average sale price ($2.65M) of 6 comparable homes.

SOLD JUL 24, 2026
$2,445,000
A
4 beds4.5 baths3,826 sq ft
681 River Rd, Cos Cob, CT 06807
SOLD AUG 7, 2026
$1,875,000
B
4 beds4.5 baths4,391 sq ft
37 W Rock Trl, Stamford, CT 06902
SOLD JUL 16, 2026
$4,000,000
C
5 beds4.5 baths4,916 sq ft
27 Cognewaugh Rd, Cos Cob, CT 06807
SOLD MAY 14, 2026
$2,500,000
D
6 beds3.5 baths5,031 sq ft
88 Starin Dr, Stamford, CT 06902
SOLD JUN 29, 2026
$3,525,000
E
5 beds3.5 baths5,213 sq ft
12 Ricki Beth Ln, Old Greenwich, CT 06870
SOLD JUL 16, 2026
$1,550,000
F
6 beds5.5 baths4,794 sq ft
163 W Hill Rd, Stamford, CT 06902

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Earn from this home

Sell

$2,561,424

Est. take-home

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Refinance

Est. cash available

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Rent

$4,609/mo

Redfin rental estimate

List your home for rent

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
$759,000
2 beds2 baths1,368 sq ft
453 E Putnam Ave Unit 4G, Cos Cob, CT 06807
See all

Provided by Redfin

Sale history for 665 River Rd

Date

Event

Price

Smart MLS #170399062

Aug 13, 2021

Sold

$3,535,000

$442/sq ft

Jun 13, 2021

Contingent

—

Jun 2, 2021

Price Changed

$3,595,000

$449/sq ft

May 17, 2021

Listed

$3,825,000

$478/sq ft

GMLS #111271

Aug 13, 2021

Sold

$3,535,000

$442/sq ft

Jul 14, 2021

Pending

—

Jun 14, 2021

Contingent

—

Jun 2, 2021

Price Changed

$3,595,000

$449/sq ft

May 7, 2021

Price Changed

$3,825,000

$478/sq ft

May 7, 2021

Relisted

—

Dec 18, 2020

Delisted

—

Sep 25, 2020

Listed

$4,199,000

$525/sq ft

+28

This chic modern home was designed with soaring ceilings and walls of windows for a seamless connection to the private three+ acre retreat. Clean lines, sleek custom cabinetry, natural materials and thoughtful architectural details, plus an open floor plan of connected spaces provides flexibility for everyday family living and entertaining. A wall of custom folding doors open from the gourmet kitchen & dining area to the outdoor terraces. The primary suite includes a private balcony, plus 5 additional bedrooms and 4.1 baths. Lush landscaping surround pool & spa, tennis court, nature trails and a serene pond w/ waterfall. NEW roof, HVAC & driveway all in 2021. National Blue Ribbon awarded North Mianus Elementary School. Close to Greenwich shopping, restaurants & beaches. MOTIVATED SELLERS!

GMLS #37768

May 21, 1998

Sold

$800,000

$100/sq ft

Jun 10, 1997

Listed

$990,000

$124/sq ft

Year

Property tax

Land + Additions

Assessment*

2023

$29,438 (+0.9%)

$1,081,920 + $1,447,950

$2,529,870

2022

$29,169 (+6.2%)

$1,081,920 + $1,447,950

$2,529,870

2021

$27,456 (+0.2%)

$927,360 + $1,353,030

$2,280,390

2020

$27,410 (−1.0%)

$927,360 + $1,353,030

$2,280,390

2019

$27,684 (+2.3%)

$927,360 + $1,353,030

$2,280,390

2018

$27,068 (−1.2%)

$927,360 + $1,353,030

$2,280,390

2017

$27,408 (+1.6%)

$927,360 + $1,353,030

$2,280,390

2016

$26,975 (−4.5%)

$927,360 + $1,353,030

$2,280,390

2014

$28,244

$902,230 + $1,527,400

$2,429,630

Tax history for 665 River Rd

Year

Property tax

Land + Additions

Assessment*

2023

$29,438 (+0.9%)

$1,081,920 + $1,447,950

$2,529,870

2022

$29,169 (+6.2%)

$1,081,920 + $1,447,950

$2,529,870

2021

$27,456 (+0.2%)

$927,360 + $1,353,030

$2,280,390

2020

$27,410 (−1.0%)

$927,360 + $1,353,030

$2,280,390

2019

$27,684 (+2.3%)

$927,360 + $1,353,030

$2,280,390

2018

$27,068 (−1.2%)

$927,360 + $1,353,030

$2,280,390

2017

$27,408 (+1.6%)

$927,360 + $1,353,030

$2,280,390

2016

$26,975 (−4.5%)

$927,360 + $1,353,030

$2,280,390

2014

$28,244

$902,230 + $1,527,400

$2,429,630

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

Public record

Beds

Baths

4.5

Stories

Lot width

—

Lot depth

—

Lot size

3.36 Acres

Year renovated

—

Sq. Ft.

5,572

Year built

1999

Style

Single Family Residential

County

Fairfield County

APN

1858881

Parking Spaces

—

Basement

—

Accessible

—

HOA Dues

—

Garage

—

Features

—

Last updated by owner on Jul 13, 2023.

Property details

Parking

Garage Information
Garage & Parking: Attached Garage
Garages Number: 2

Interior

Virtual Tour Information
Has Virtual Tour

Interior Information
Total Rooms: 11
Laundry Room Location: Separate Room
Laundry Room Info: Upper Level
Interior Features: Auto Garage Door Opener, Cable - Pre-wired, Open Floor Plan, Security System
Thermostat(s)
Fireplaces Total: 1
Cooling System: Central Air, Zoned
Appliances Included: Gas Cooktop, Wall Oven, Microwave, Subzero, Dishwasher, Washer, Dryer, Wine Chiller

Bathroom Information
# of Baths (Full): 4
# of Baths (Half): 1

Bedroom Information
Beds Total: 6

Room Information
Rooms Additional: Laundry Room
Room Count: 14
Basement Description: Full With Walk-Out
Has Attic
Attic Description: Storage Space

Exterior

Exterior Features
Roof Information: Asphalt Shingle
Exterior Siding: Stucco
Exterior Features: Balcony, French Doors, Garden Area, Shed, Stone Wall, Tennis Court, Terrace, Underground Sprinkler, Underground Utilities

Lot Information
Lot Description: On Cul-De-Sac, Some Wetlands, Secluded, Treed, Professionally Landscaped

Land Information
Encumbrances Restrictions: Easements

Pool Information
Swimming Pool
Pool Description: In Ground Pool, Spa, Heated, Safety Fence, Auto Cleaner, Gunite

Building Information
Foundation Type: Concrete
Construction Description: Brick, Stucco

Property Information
Waterfront Description: Pond
Property Type: Single Family For Sale
Living Area SQFT Per Public Record: 5894
Driveway Type: Private, Asphalt

Financial

Assessments Information
Assessed Value: $2,280,390

Utilities

Utility Information
Water Source: Private Well
Sewage System: Public Sewer Connected
Hot Water Description: Electric
Heat Type: Hot Air, Zoned
Heat Fuel Type: Oil
Fuel Tank Location: In Basement
Energy Features: Programmable Thermostat

Location

School Information
Middle Jr High School: Eastern
High School: Greenwich
Elementary School: North Mianus

Location Information
State: Connecticut
Nearby Amenities: Golf Course, Library, Medical Facilities, Park, Playground/Tot Lot, Shopping/Mall
Directions: Palmer Hill Road to River Road (at light opposite North Mianus School). House at top of hill of private drive.
County: Fairfield

Public facts

Beds: 7
Baths: 4.5
Sq. Ft.: 5,572
Stories: 3.0
Lot Size: 3.36 acres
Style: Single Family Residential
Year Built: 1999
Year Renovated: —
County: Fairfield County
APN: 1858881

Home facts updated by county records on Jul 12, 2023

Other

Documents & Disclosures
Supplement Count Public: 4

Around this home

Schools

North Mianus School

Public K-5 • Assigned • 0.8mi

9/10

Eastern Middle School

Public 6-8 • Assigned • 2.3mi

10/10

Greenwich High School

Public 9-12 • Assigned • 2.6mi

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

5/10 Heat Factor

7 days above 99° expected this year, 15 days in 30 years

6/10 Wind Factor

66% 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

$5.16M – $6.24M

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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

$759,000

2 beds2 baths1,368 sq ft

453 E Putnam Ave Unit 4G, Cos Cob, CT 06807

Home values near 665 River Rd

Data from public records.

Address	Redfin Estimate
687 River Road, Cos Cob, CT 4 Beds \| 4 Baths \| 3025 Sq. Ft.	$2,791,498
664 River Road, Cos Cob, CT 3 Beds \| 2.5 Baths \| 3312 Sq. Ft.	$2,535,364

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

Address	Redfin Estimate
656 River Road, Cos Cob, CT 3 Beds \| 2 Baths \| 1921 Sq. Ft.	$1,795,277
682 River Road, Cos Cob, CT 5 Beds \| 2.5 Baths \| 3437 Sq. Ft.	$3,005,538

Property information provided by Smart MLS when last listed in 2021. This data may not match . Learn more.

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