Pending

$1,450,000

21 Windsor Ln, Cos Cob, CT 06807

4beds

2,412sqft

$8,277/mo

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Residential, Single Family Residence

Built in 1982

0.28 Acres Lot

$1,480,400 Zestimate^®

$601/sqft

$-- HOA

What's special

Quiet streetSunfilled open plan

North Mianus School, Eastern Middle School. Come reimagine this home and make it yours. Sunfilled open plan 1982 Construction home. 4 BDRM, 3 BATH, FP and extra large 15' by 30' Family room /FP on first floor. 2412 sqft with room for expansion to this R-7 home on .277 of an acre. FAR is .315 Quiet street, connects to sidewalks on Valley Road. This won't last!

58 days

764

21

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 4
Bathrooms: 3
Full bathrooms: 3

Heating

Natural Gas, Forced Air

Cooling

Central Air

Appliances

Laundry: Laundry Room

Features

Eat-in Kitchen, Entrance Foyer
Number of fireplaces: 1

Interior area

Total structure area: 2,412
Total interior livable area: 2,412 sqft

Property

Parking

Total spaces: 2
Parking features: Garage Door Opener
Garage spaces: 2

Lot

Size: 0.28 Acres

Details

Parcel number: 08A1334/S
Zoning: R-12

Construction

Type & style

Home type: SingleFamily
Property subtype: Residential, Single Family Residence

Materials

Wood Siding
Roof: Asphalt

Condition

Year built: 1982

Utilities & green energy

Water: Public

Community & HOA

Location

Region: Cos Cob

Financial & listing details

Price per square foot: $601/sqft
Tax assessed value: $816,690
Annual tax amount: $8,562
Date on market: 6/25/2026
Inclusions: Washer/Dryer, All Kitchen Applncs

Estimated market value

$1,480,400

$1.41M - $1.55M

$7,844/mo

Price history

Date	Event	Price
8/5/2026	Pending sale	$1,450,000$601/sqft
Source: Greenwich MLS, Inc. #125359 Report a problem
6/25/2026	Listed for sale	$1,450,000+52.5%$601/sqft
Source: Greenwich MLS, Inc. #125359 Report a problem
1/10/2017	Sold	$951,000$394/sqft
Source: Agent Provided Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$7,696 +3.5%	$622,720
2024	$7,433 +2.6%	$622,720
2023	$7,246 +0.9%	$622,720
2022	$7,180 +0.1%	$622,720 +4.6%
2021	$7,170 +0.2%	$595,490
2020	$7,158 -1%	$595,490
2019	$7,229 +2.3%	$595,490
2018	$7,068 -1.2%	$595,490
2017	$7,157 -2%	$595,490 -2.8%
2015	$7,306 +2.6%	$612,640
2014	$7,122 +2.8%	$612,640
2013	$6,929 +2.8%	$612,640
2012	$6,739 +3.4%	$612,640
2011	$6,518 +3.3%	$612,640 -12.3%
2010	$6,312 +3.4%	$698,180
2009	$6,102 +3.5%	$698,180
2008	$5,893 +3.6%	$698,180
2007	$5,690 +3.8%	$698,180
2006	$5,481 +63.3%	$698,180 +139.4%
2005	$3,357 -42.2%	$291,690 -44.1%
2004	$5,807 +3.4%	$522,200
2003	$5,614 +154%	$522,200 +341.9%
2001	$2,210 +5.7%	$118,160
2000	$2,091 -4.6%	$118,160
1999	$2,192	$118,160

Find assessor info on the county website

Monthly payment

Est. payment

Payment breakdown

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Principal & interest
$1,547
Mortgage insurance
$0
Property taxes
$170
Home insurance
$105
HOA fees
$0
Utilities
Not included

All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.

HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.

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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: 0.5 mi
10/10
Eastern Middle School
Grades: 6-8Distance: 2 mi
10/10
Greenwich High School
Grades: 9-12Distance: 2.3 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.