Off market dec 2022 for $4M

$5,005,656

Est. refi paymentEst. refi $27,582/mo

•

6,200

sq ft

434 Cognewaugh Rd, Cos Cob, CT 06807

About this home

Stylish five-bedroom Colonial presides over 2.08 exceedingly private acres with pool, stone terrace and outdoor fireplace in enclosed backyard. Stunning, like-new interior showcases six fireplaces, wood floors and great architectural detailing with tray and coffered ceilings. Main level reveals luxurious formal rooms, office/library, chef's kitchen open to breakfast and family rooms, butler's pantry, half bath and three-car garage access. Serene primary suite with sitting room/office, walk-in closet and deluxe bath; two ensuite bedrooms, two bedrooms with shared bath and laundry comprise second floor. With top floor playroom, lower level media room, gym, recreational room, half bath and arts/crafts room. Close proximity to Mianus River Park trails.

Single-familyProperty Type

2004Year Built

2.08 acresLot Size

$807Est. Price/Sq.Ft.

3 car garageParking

Listed by Jenny Allen • Compass Connecticut, LLC

Bought with Lindsay Sheehy • Houlihan Lawrence

Redfin checked: a few seconds ago

•Source:GMLS #117013

Redfin Estimate

$5,005,656

$961K since sold in December 2022$112K since September

Recently sold homes
Estimate history
Homes for sale

This home's estimate is 34.2% higher than the average sale price ($3.73M) of 6 comparable homes.

SOLD JUL 14, 2026
$4,700,000
A
5 beds5.5 baths5,169 sq ft
34 Dunwoodie Pl, Greenwich, CT 06830
SOLD JUL 7, 2026
$3,100,000
B
5 beds5.5 baths5,114 sq ft
300 Stanwich Rd, Greenwich, CT 06830
SOLD SEP 15, 2026
$2,675,000
C
4 beds4 baths4,851 sq ft
3 Carriage Rd, Cos Cob, CT 06807
SOLD MAY 29, 2026
$3,100,000
D
5 beds4.5 baths5,389 sq ft
399 Stanwich Rd, Greenwich, CT 06830
SOLD MAY 19, 2026
$5,650,000
E
4 beds5 baths5,417 sq ft
129 Doubling Rd, Greenwich, CT 06830
SOLD SEP 2, 2026
$3,150,000
F
4 beds5.5 baths3,983 sq ft
94 Londonderry Dr, Greenwich, CT 06830

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Earn from this home

Sell

$1,716,247

Est. take-home

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Refinance

Est. cash available

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Rent

$4,472/mo

Redfin rental estimate

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Market trends in 06807, CT

Last updated September 2026

Buyer's Market

Seller's Market

Seller's market

Sale-to-List Price

105.6%

0.4% MoM

Median sale price

$1.9M

$87K MoM

Avg. days on market

19d

4 days MoM

Recently sold homes

2 MoM

New listings for sale

$3,750,000
5 beds4.5 baths3,983 sq ft
5 Butler St, Cos Cob, CT 06807
$1,495,000
4 beds3 baths1,774 sq ft
4 Tremont St, Cos Cob, CT 06807
$1,395,000
5 beds3 baths2,805 sq ft
73 Cos Cob Ave, Greenwich, CT 06830
$1,395,000
5 beds3 baths2,805 sq ft
73 Cos Cob Ave, Cos Cob, CT 06807
VIDEO TOUR
$4,295,000
4 beds4.5 baths6,553 sq ft
23 Daffodil Ln, Cos Cob, CT 06807
See all

Provided by Redfin

Sale history for 434 Cognewaugh Rd

Date

Event

Price

GMLS #117013

Dec 2, 2022

Sold

$4,045,000

$652/sq ft

Oct 31, 2022

Pending

—

Oct 21, 2022

Contingent

—

Oct 12, 2022

Listed

$3,995,000

$644/sq ft

GMLS #113839

Jul 7, 2021

Sold

$3,460,000

$558/sq ft

Jul 7, 2021

Listed

$3,460,000

$558/sq ft

+22

Smart MLS #170330983

Nov 17, 2020

Listing Removed

—

Aug 27, 2020

Listed

$3,545,000

$572/sq ft

GMLS #110923

Aug 27, 2020

Listed

$3,545,000

$572/sq ft

Smart MLS #170076100

Jan 9, 2019

Listing Removed

—

Apr 24, 2018

Listed

$3,435,000

$554/sq ft

GMLS #102584

Oct 29, 2018

Price Changed

$3,399,000

$548/sq ft

Oct 1, 2018

Price Changed

$3,435,000

$554/sq ft

Apr 3, 2018

Listed

$3,595,000

$580/sq ft

Smart MLS #170015157

Apr 21, 2018

Listing Removed

—

Sep 15, 2017

Listed

$3,685,000

$594/sq ft

GMLS #100939

Sep 5, 2017

Listed

$3,685,000

$594/sq ft

GMLS #68458

May 2, 2008

Sold

$3,816,000

$615/sq ft

Jan 10, 2008

Listed

$3,998,000

$645/sq ft

GMLS #67664

Sep 21, 2007

Listed

$4,325,000

$698/sq ft

GMLS #59029

May 17, 2005

Sold

$3,700,000

$597/sq ft

Feb 28, 2005

Listed

$3,695,000

$596/sq ft

GMLS #54916

Feb 2, 2004

Sold

$1,200,000

$194/sq ft

Oct 28, 2003

Listed

$1,295,000

$209/sq ft

Year

Property tax

Land + Additions

Assessment*

2023

$25,676 (+8.6%)

$625,800 + $1,628,480

$2,254,280

2022

$23,637 (−10.3%)

$625,800 + $1,469,650

$2,095,450

2021

$26,341 (+1.2%)

$568,960 + $1,703,800

$2,272,760

2020

$26,033 (−0.3%)

$568,960 + $1,677,200

$2,246,160

2019

$26,104 (+2.7%)

$568,960 + $1,665,930

$2,234,890

2018

$25,411

$568,960 + $1,665,930

$2,234,890

2017

$25,411 (+1.5%)

$568,960 + $1,665,930

$2,234,890

2016

$25,031 (−5.5%)

$568,960 + $1,665,930

$2,234,890

2014

$26,496

$901,950 + $1,513,400

$2,415,350

Tax history for 434 Cognewaugh Rd

Year

Property tax

Land + Additions

Assessment*

2023

$25,676 (+8.6%)

$625,800 + $1,628,480

$2,254,280

2022

$23,637 (−10.3%)

$625,800 + $1,469,650

$2,095,450

2021

$26,341 (+1.2%)

$568,960 + $1,703,800

$2,272,760

2020

$26,033 (−0.3%)

$568,960 + $1,677,200

$2,246,160

2019

$26,104 (+2.7%)

$568,960 + $1,665,930

$2,234,890

2018

$25,411

$568,960 + $1,665,930

$2,234,890

2017

$25,411 (+1.5%)

$568,960 + $1,665,930

$2,234,890

2016

$25,031 (−5.5%)

$568,960 + $1,665,930

$2,234,890

2014

$26,496

$901,950 + $1,513,400

$2,415,350

*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

Stories

Lot width

—

Lot depth

—

Lot size

90,604

Year renovated

—

Sq. Ft.

6,200

Year built

2004

Style

Single Family Residential

County

Fairfield County

APN

1858605

Parking Spaces

Basement

Yes

Accessible

HOA Dues

—

Garage

Yes

Features

Pool

Last updated by owner on Sep 30, 2025.

Property details

Parking

Parking and Garage Information
Has Garage
# of Garage Spaces: 3

Interior

Bathroom Information
# of Full Bathrooms: 4
# of Half Bathrooms: 2
Bathrooms Total Integer: 6
Bathrooms Total Decimal: 5

Heating & Cooling
Has Cooling
Cooling: Central A/C
Has Heating
Heating: Hydro-Air, Natural Gas

Interior Features
Interior Features: Sep Shower, Whirlpool Tub, Eat-in Kitchen, Kitchen Island, Pantry, Back Stairs, Central Vacuum, Entrance Foyer
Has Fireplace(s)
# of Fireplaces Total: 6
Basement: Finished

Exterior

Exterior Features
Patio And Porch Features: Terrace
Private Pool

Property Information
Property Sub-Type: Single Family Residence
Year Built: 2004
Year Built Effective: 2021
Roof: Wood
Construction Materials: Shake Shingle
Security Features: Security System
Other Equipment: Generator
Building Area Total: 5406.0
Building Area Source: Taxcard

Lot Information
Lot Features: Fenced, Level
Lot Size Area: 2.08
Lot Size Units: Acres
Lot Size Square Feet: 90604.8
Lot Size Acres: 2.08
Zoning: RA-2

Financial

Tax Information
Tax Annual Amount: $23,637
Tax Assessed Value: $2,095,450

Utilities

Utilities Information
Sewer: Septic Tank
Water Source: Well

Location

School Information
Elementary School: North Street
Middle Or Junior School: Central

Public facts

Beds: 5
Baths: 5.0
Sq. Ft.: 6,200
Stories: 2.0
Parking Spaces: 3
Basement: Yes
Accessible: No
Lot Size: 2.08 acres
Style: Single Family Residential
Year Built: 2004
Year Renovated: —
County: Fairfield County
APN: 1858605
HOA Dues: —
Garage: Yes
Features: Pool

Home facts updated by owner on Sep 30, 2025

Around this home

Schools

North Street School

Public PreK-5 • Assigned • 2.0mi

9/10

Central Middle School

Public 6-8 • Assigned • 2.3mi

8/10

Greenwich High School

Public 9-12 • Assigned • 2.8mi

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, 16 days in 30 years

6/10 Wind Factor

56% 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

$4.76M – $5.76M

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New listings for sale in 06807

$3,750,000

5 beds4.5 baths3,983 sq ft

5 Butler St, Cos Cob, CT 06807

$1,495,000

4 beds3 baths1,774 sq ft

4 Tremont St, Cos Cob, CT 06807

$1,395,000

5 beds3 baths2,805 sq ft

73 Cos Cob Ave, Greenwich, CT 06830

$1,395,000

5 beds3 baths2,805 sq ft

73 Cos Cob Ave, Cos Cob, CT 06807

VIDEO TOUR

$4,295,000

4 beds4.5 baths6,553 sq ft

23 Daffodil Ln, Cos Cob, CT 06807

Home values near 434 Cognewaugh Rd

Data from public records.

Address	Redfin Estimate
399 Cognewaugh Road, Cos Cob, CT 4 Beds \| 4.5 Baths \| 4171 Sq. Ft.	$2,975,356
480 Cognewaugh Road, Cos Cob, CT 4 Beds \| 5.5 Baths \| 5444 Sq. Ft.	$3,796,022

Address	Redfin Estimate
414 Cognewaugh Road, Cos Cob, CT 5 Beds \| 4 Baths \| 3333 Sq. Ft.	$2,467,009
464 Cognewaugh Road, Cos Cob, CT 5 Beds \| 4.5 Baths \| 5776 Sq. Ft.	$3,310,916

Address	Redfin Estimate
441 Cognewaugh Road, Cos Cob, CT 4 Beds \| 3 Baths \| 3399 Sq. Ft.	$2,041,547
451 Cognewaugh Road, Cos Cob, CT 4 Beds \| 3.5 Baths \| 4009 Sq. Ft.	$2,413,765

Property information provided by GMLS when last listed in 2022. This data may not show owner updates. Learn more.

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