Date
Details
Price
Change
Source
10/27/2025
Listed
$1,575,000
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
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$1,575,000
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Property Description
.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 unique combination of privacy, potential, and flexibility. The lot is fully entitled with plans to build a 4,200 sq. ft. custom home, making it 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 1-bedroom, 1-bathroom cottage that is grandfathered in-perfect for rental income, a guest house, or an in-law suite while the main home is being built. This is a rare offering in one of Greenwich's most sought-after areas, within the North Mianus Elementary and Eastern Middle School districts,
Full Property Details
Full Property Details for 9 Walnut St
General
- Price: $1,575,000
- Taxes: $8,825
- Status: Active
- Type: Lots/Land
- Source: Greenwich
- MLS ID: 123887
- Updated: 12/10/2025
- Added to Site: 80 day(s) ago
Rooms
Bathrooms
- Total Bathrooms: 1
- Full Bathrooms: 1
Bedrooms
- Total Bedrooms: 3
Location
- Area: 4 - Cos Cob
- County: Fairfield
- Driving Directions: Valley Road to Walnut
School Information
- Elementary School: North Mianus
- Middle School: Eastern Middle
Heating & Cooling
- Cooling Type: None
- Heating Type: Natural Gas, Hot Water
- Heating Fuel: Gas
Utilities
- Gas: Public Utility
- Sewer: Town Sewer
- Water: Public
Structural Information
- Architectural Style: Colonial
- Construction: Wood Siding
- Square Feet: 1,482
- Year Built: 1970
Additional Structures
- Other Structures: Guest House
Lot Features
- Lot Size (Acres): 0.52
- Lot Size (Sq. Ft.): 22,651.2
- Frontage: Private Road
- Lot Features: Cul-De-Sac, Level
- Zoning: R-12
- Lot Description: Level
Financial Considerations
- Price Per Acre: $3,028,846.15
- Tax Amount: $8,825
Disclosures and Reports
- Property ID: 08-2718/S
Listed by BHHS New England Properties
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Listing agent
— 9 Walnut St —
BHHS New England Properties
NMLS#: 1598647Get Pre-Approved Today
Schools
Schools serving 9 Walnut St
School District:Greenwich School District
| Name | Grades | Distance |
|---|---|---|
North Mianus School 309 Palmer Hill Rd., Greenwich, CT 06878 | K-5 | 0.8 mi |
Eastern Middle School 51 Hendrie Ave., Greenwich, CT 06878 | 6-8 | 2.4 mi |
Greenwich High School 10 Hillside Road, Greenwich, CT 06830 | 9-12 | 2.7 mi |
Disclaimer:
School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.
Price & Sales History for 9 Walnut St
Tax History
Tax History for 9 Walnut St
Year
Property Taxes
Change
Tax Assessment
Change
2024
$8,825
4%
$714,140
—
2023
$8,524
3%
$714,140
—
2023
$8,310
1%
$714,140
—
2022
$8,234
2%
$714,140
11%
2021
$8,096
5%
$641,340
—
2020
$7,709
-1%
$641,340
—
2019
$7,786
2%
$641,340
—
2018
$7,613
-1%
$641,340
—
2017
$7,708
2%
$641,340
—
2016
$7,586
30%
$641,340
31%
2015
$5,819
2%
$490,490
—
2014
$5,702
3%
$490,490
—
2013
$5,547
—
$490,490
—
2011
$5,547
—
$490,490
—
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.
Estimate the Cost
Estimate the Cost for 9 Walnut St
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Listed by THE REID TEAM AT COLDWELL BANKER REALTY (203) 400-0841
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- Lots/Land
- Active
- Updated 7 hours ago
- 0.17Acres
Listed by William Raveis Real Estate
- Single Family
- Active
- Updated 7 hours ago
- 3Beds
- 2Total Baths
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- Single Family
- Closed
- 3Beds
- 3Total Baths
- 2,332Sq. Ft.
Listed by Berkshire Hathaway NE Prop.
Sold by The Richard Breglia Team
Sold by The Richard Breglia Team
- Single Family
- Closed
- 4Beds
- 4Total Baths
- 3,510Sq. Ft.
Listed by Sotheby's International Realty
Sold by BHGRE Shore & Country Properties
Sold by BHGRE Shore & Country Properties
9 Walnut Street, Greenwich, CT 06807 (MLS# 123887) is a Lots/Land property with a lot size of 0.52 acres. 9 Walnut Street is currently listed for $1,575,000 and was received on October 27, 2025. Want to learn more about 9 Walnut Street? Do you have questions about finding other Lots/Land real estate for sale in Cos Cob? You can browse all Cos Cob real estate or contact a Coldwell Banker agent to request more information.