9 Walnut St, Cos Cob, CT 06807
Property image
Property image
SOLD
AUG 3, 2026

$1,375,000

Last sold price
  • 3 Beds
  • 1 Bath
  • 1,482 sqft (on 0.52 acres)

9 Walnut St, Cos Cob, CT 06807

Cos Cob
Est. Refi. Payment $9,241/mo*
Refinance Your Home
Currently Off Market - Sold Aug 3, 2026 for $1,375,000 (8% below list price)

Home Value

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Comparable sales

These are recently sold homes that have a similar location or other similar features to this home, like bedrooms, bathrooms, and square footage. Get a sense of the expected prices in the area by viewing these homes.
Address
Distance
Property Type
Sold Price
Sold Date
Bed
Bath
Sqft
23 Nimitz Pl, Old Greenwich, CT
1.10
Lot/Land
$2,200,000
09/09/26
3
2
1,454
5 Old Wagon Rd, Old Greenwich, CT
1.14
Lot/Land
$2,127,000
08/28/26
3
2
2,303
33 Parsonage Rd, Greenwich, CT
2.32
Lot/Land
$2,000,000
11/12/25
4
1.5
-
6 Oak Dr, Riverside, CT
3.04
Lot/Land
$3,800,000
06/17/26
4
3
3,120
19 Lakeview Drive, Riverside, CT
1.41
Lot/Land
$1,800,000
07/21/26
-
-
89 Clapboard Ridge Rd, Greenwich, CT
2.76
Lot/Land
$4,700,000
12/19/25
5
3
3,622
59 Locust St, Greenwich, CT
3.67
Lot/Land
$3,840,000
06/01/26
5
3
3,360
53 Pakenmer Road, Stamford, CT
2.18
Lot/Land
$640,000
10/10/25
-
-

Nearby home prices

Get a sense of expected prices in the area by checking the value of nearby homes.
Address
Distance
Price
Bed
Bath
Sqft
Status
42 Mimosa Dr, Cos Cob, CT 06807
0.05
$3,499,500
4
2.5
2,751
Off Market
93 Hillcrest Park Road, Cos Cob, CT 06807
0.07
$2,723,100
4
3.5
3,576
Off Market
72 Hillcrest Park Road, Cos Cob, CT 06807
0.07
$4,608,200
5
4.5
4,180
Off Market
51 Hillcrest Park Road, Cos Cob, CT 06807
0.08
-
6
5
6,213
Off Market
43 Hillcrest Park Road, Cos Cob, CT 06807
0.08
$2,278,100
3
3
2,765
Off Market
41 Hillcrest Park Road, Cos Cob, CT 06807
0.09
$2,268,300
4
3
3,152
Off Market
50 Hillcrest Park Road, Greenwich, CT 06807
0.08
$4,072,200
6
6
6,062
Off Market
37 Barton Ln, Cos Cob, CT 06807
0.14
$1,817,300
3
2.5
2,007
Off Market
7 Chestnut St, Cos Cob, CT 06807
0.11
$2,654,600
5
4.5
4,000
Off Market
446 Valley Rd, Cos Cob, CT 06807
0.13
-
2
1.5
2,127
Off Market
500 Valley Rd, Cos Cob, CT 06807
0.18
$3,989,200
4
3.5
5,356
Off Market

Local Information

  • Map ViewExplore the area around 9 Walnut St.
  • Schools1 Elementary School1 Middle School1 High School
  • Shop & Eat
-- mins to
Commute Destination

Home Highlights

Lot/Land
Built in 1970
0.52 acre lot
1,482 sqft
$928/sqft

About this House

..52-Acre Buildable Lot with Existing Cottage -- North Mianus

Nestled at the end of a private road in the desirable North Mianus neighborhood, this .52-acre property offers a rare combination of privacy, potential, and flexibility. Build your own custom home--ideal for builders, investors, or end-users looking to create their dream residence.

In addition to the new-construction opportunity, the property includes an existing grandfathered 1-bedroom, 1-bath cottage, perfect for rental income, a guest house, or an in-law suite while the main home is being built.

A rare offering in one of Greenwich's most sought-after areas, located within the North Mianus Elementary and Eastern Middle School districts.
9 Walnut St, Cos Cob, CT 06807 is a 3 bedroom, 1 bathroom, 1,482 sqft lot/land in Cos Cob, built in 1970. It last sold for $1,375,000 on Aug 3, 2026 (8% below the $1,495,000 asking price). This property is not currently displayed as for sale or rent on Trulia.
Last check for updates: about 18 hours ago
Listed by Peter Janis, (203) 249-1013
BHHS New England Properties
Bought with: Spencer Sodokoff, (203) 257-4870, Houlihan Lawrence
Source: Greenwich MLS, Inc., MLS#123887

Home Details for 9 Walnut St

Interior Features

Beds & Baths
Number of Bedrooms: 3Number of Bathrooms: 1Number of Bathrooms (full): 1
Dimensions and Layout
Living Area: 1482 Square Feet
Heating & Cooling
Heating: Natural Gas,Hot WaterNo CoolingAir Conditioning: NoneHas HeatingHeating Fuel: Natural Gas

Exterior Features

Exterior Home Features
Other Structures: Guest House
Frontage
Road Frontage: Private Road

Property Information

Year Built
Year Built: 1970
Property Type / Style
Property Type: LandProperty Subtype: LandArchitecture: Colonial
Building
Construction Materials: Wood Siding
Property Information
Parcel Number: 082718/S

Price & Status

Price
List Price: $1,495,000Price Per Sqft: $928/sqft
Status Change & Dates
Off Market Date: Mon Jul 27 2026

Active Status

MLS Status: Closed

Location

Direction & Address
City: Cos Cob
School Information
Elementary School: North MianusJr High / Middle School: Eastern Middle

Building

Building Area
Building Area: 1482 Square Feet

Lot Information

Lot Area: 0.52 acres

Mobile R/V

Mobile Home Park
Mobile Home Units: Feet

Miscellaneous

Mls Number: 123887

Price and Tax history

DateEventPrice
Aug 3, 2026
Source: Greenwich MLS, Inc. #123887
Sold
$1,375,000
Jul 27, 2026
Source: Berkshire Hathaway HomeServices New England Properties #123887
Contingent
$1,495,000
Jul 27, 2026
Source: Greenwich MLS, Inc. #123887
Pending
$1,495,000
Apr 18, 2026
Source: Berkshire Hathaway HomeServices New England Properties #123887
PriceChange
$1,495,000
Price decreased by 5%
Apr 18, 2026
Source: Berkshire Hathaway HomeServices New England Properties #24138306
PriceChange
$1,575,000
Price increased by 5%

Market trends in Greenwich

Last updated August 2026
Buyer'sMarketSeller'sMarket
Avg. sale price
$2.58M
$150KMoM
Sale-to-List Price
104.8%
1.0%MoM
Price per sq ft
$825
$1MoM
Available listings
152
30MoM

Around this home

Neighborhood Overview

Cos Cob
See Local Highlights
Neighborhood stats provided by third party data sources.

What Locals Say about Cos Cob

At least 1 Trulia users voted on each feature.

  • 100 % Say neighbors are friendly

  • 100 % Say there are community events

  • 100 % Say there's holiday spirit

  • 100 % Say it's walkable to grocery stores

  • 100 % Say it's walkable to restaurants

  • 100 % Say parking is easy

  • 100 % Say car is needed

  • 100 % Say streets are well-lit

  • 100 % Say it's dog friendly

Sourced by Trulia users. Learn more about our methodology.

LGBTQ Local Legal Protections

Listing data courtesy of Greenwich MLS. IDX information is provided exclusively for consumers’ personal, non-commercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data is deemed reliable but is not guaranteed accurate by the MLS.

Frequently asked questions about 9 Walnut St

  • What is the price history for 9 Walnut St?
    9 Walnut St in Cos Cob, CT last sold for $1,375,000 in August 2026.
  • Is Cos Cob a buyer's or seller's market?
    Cos Cob is currently a seller's market, based on recent for-sale activity.
  • What's the median sale price in Cos Cob?
    The median sale price in Cos Cob is $2.58M. That is up $150K from the prior month.
  • What are the closest schools to 9 Walnut St?
    The closest schools to 9 Walnut St in Cos Cob, CT are Eastern Middle School (rated 10/10), Greenwich High School (rated 10/10), North Mianus School (Elementary, rated 9/10).

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