Pending

$950,000

420 Valley Rd, Cos Cob, CT 06807

4beds

1,601sqft

Est.:

Residential, Single Family Residence

Built in 1960

0.27 Acres Lot

$-- Zestimate^®

$593/sqft

$-- HOA

What's special

First time on the market in 36 years! This charming four-bedroom, two and a half bath residence presents a wonderful opportunity to reimagine and create a home tailored to your vision. The interiors offer a blank canvas for thoughtful renovation, while the lower level provides bonus living space and flexibility for bedrooms, media room, gym space etc. Situated across from the Mianus River with a prime location affords quick and easy access to schools, parks, train, shopping and dining. Highest and Best by Monday 3/30/26 by 5PM.

17 days

5,930

358

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 4
Bathrooms: 3
Full bathrooms: 2
1/2 bathrooms: 1

Heating

Natural Gas, Hot Water

Features

Basement: Full,Unfinished
Number of fireplaces: 2

Interior area

Total structure area: 1,601
Total interior livable area: 1,601 sqft

Property

Parking

Total spaces: 1
Parking features: Garage Door Opener
Garage spaces: 1

Lot

Size: 0.27 Acres

Details

Parcel number: 083660/S
Zoning: R-12
Other equipment: Generator

Construction

Type & style

Home type: SingleFamily
Architectural style: Ranch
Property subtype: Residential, Single Family Residence

Materials

Shingle Siding
Roof: Asphalt

Condition

Year built: 1960

Utilities & green energy

Water: Public
Utilities for property: Cable Connected

Community & HOA

Location

Region: Cos Cob

Financial & listing details

Price per square foot: $593/sqft
Tax assessed value: $630,140
Annual tax amount: $7,788
Date on market: 3/27/2026
Inclusions: Washer/Dryer

Estimated market value

Not available

Estimated sales range

Not available

$6,825/mo

Price history

Date	Event	Price
4/2/2026	Pending sale	$950,000$593/sqft
Source: Greenwich MLS, Inc. #124561 Report a problem
3/27/2026	Listed for sale	$950,000+150.7%$593/sqft
Source: Smart MLS #24160915 Report a problem
1/5/1990	Sold	$379,000$237/sqft
Source: Agent Provided Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$7,788 +3.6%	$630,140
2024	$7,521 +2.6%	$630,140
2023	$7,332 +0.9%	$630,140
2022	$7,266 -2.3%	$630,140 +2%
2021	$7,438 +0.2%	$617,750
2020	$7,425 -1%	$617,750
2019	$7,499 +2.3%	$617,750
2018	$7,333 -1.2%	$617,750
2017	$7,425 +17.2%	$617,750 +16.3%
2015	$6,335 +2.7%	$531,230 +0.1%
2014	$6,171 +2.8%	$530,880
2013	$6,004 +2.8%	$530,880
2012	$5,840 +3.4%	$530,880
2011	$5,649 +7.6%	$530,880 -8.6%
2010	$5,250 +3.4%	$580,720
2009	$5,075 +3.6%	$580,720
2008	$4,901 +3.5%	$580,720
2007	$4,733 +3.8%	$580,720
2006	$4,559 +12%	$580,720 +72.5%
2005	$4,070 +8.7%	$336,630
2004	$3,743 +3.4%	$336,630
2003	$3,619 -17.2%	$336,630 +44%
2001	$4,372 +5.7%	$233,800
2000	$4,138 -4.6%	$233,800
1999	$4,337	$233,800

Find assessor info on the county website

Monthly payment

Est. payment

$6,015/mo

Principal & interest

$4677

Property taxes

$1338

More affordability tools

Climate risks

Neighborhood: Cos Cob

Getting around

10 / 100

Car-Dependent

5 / 100

Somewhat Bikeable

Nearby schools

GreatSchools rating

9/10
North Mianus School
Grades: K-5Distance: 0.6 mi
9/10
Eastern Middle School
Grades: 6-8Distance: 2.2 mi
10/10
Greenwich High School
Grades: 9-12Distance: 2.6 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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