9 Walnut St

$1,575,000
Price
22,651 / 0.52
Lot Size / Acres

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
....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,

Property Details for 9 Walnut Street

Section
North Mianus
Design
Colonial
LISTING UPDATED: 12/02/2025 02:30 PM

Property Details for 9 Walnut Street

StatusActive
MLS #123887
Days on Market39
Taxes$8,825 / year
HOA Fees-
Condo/Co-op Fees-
Compass TypeLand
MLS TypeLand
Year Built1970
Lot Size0.52 AC
CountyFairfield County

Location

Listing Courtesy of BHHS New England Properties, Peter Janis
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Building Information for 9 Walnut Street

Lot Size0.52 AC

Payment Calculator

$8,518 per month

30 year fixed, 6.28% Interest

Principal and Interest

$7,783

Property Taxes

$735

HOA Dues

$0

The Payment Calculator is for illustrative purposes only.

Property Information for 9 Walnut Street

Summary
Location and General Information
  • Area: 4 - Cos Cob
  • Elementary School: North Mianus
  • Middle School: Eastern Middle
  • Directions: Valley Road to Walnut
  • City: Cos Cob
  • MLS Area Major: 4 - Cos Cob
  • Longitude: -73.580535
  • Latitude: 41.07
  • Postal Code: 06807
  • County: Fairfield
  • State Or Province: CT
HOA and Fees
  • Parcel Number: 08-2718/S
  • Association Chg/Yr: $0
  • Taxes: $8,825
Interior and Exterior Features
Interior Features
  • Bathrooms Total Integer: 1
  • Baths Full: 1
  • Baths Half: 0
  • Beds Total: 3
  • Cooling: No
  • Heating: Yes
  • Heat System: Hot Water: Yes
  • Cooling: None: Yes
  • Cooling System: None
Exterior Features
  • Exterior: Wood Siding: Yes
  • Exterior: Wood Siding
Property
Lot Information
  • Location Property Info: List PriceAcre: $3,028,846.15
  • Location Property Info: Owner: Teddiv LLC
  • Location Property Info: Zoning: R-12
  • Location Property Info: Owner Financing: No
  • Location Property Info: Section: North Mianus
  • Location Property Info: RTM District: 08
  • Location Property Info: CIOA: No
  • Location Property Info: For Rent: No
  • Lot Description: Cul-De-Sac,Level
  • Lot Size Acres: 0.52
  • Lot Size Area: 0.52
  • Lot Size Square Feet: 22651.2
  • Lot Size Units: Acres
  • Lot Description: Cul-de-Sac: Yes
  • Lot Description: Level: Yes
  • Dwelling Info: Dwelling: Yes
  • Dwelling Info: SqFt Source: Taxcard
  • Dwelling Info: Rooms: 5.0
  • Dwelling Info: # HBths: 0.0
Property and Assessments
  • General Property Info: Acres -: 0.52
  • General Property Info: # Lots: 1.0
  • General Property Info: Lot Location: Front
  • General Property Info: Land Staked: No
  • General Property Info: Elementary School: North Mianus
  • General Property Info: Middle School: Eastern Middle
  • Assessment: $714,140
  • Zoning: R-12
  • Sanitation Source: Town Sewer
  • Outbuildings: Guest House
  • Approvals Guarenteed: Planning Zoning: Yes
  • Restrictions: None: Yes
Utilities
  • Road Access: Private Road
  • Gas Source: Public Utility: Yes
  • Heat Fuel: Gas: Yes
  • Heat System: Natural Gas, Hot Water
  • Water Source: Public
Multi Family
Building Details
  • Public Remarks: .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,

Public Records for 9 Walnut Street

Taxable ValueLand$584,360Additions$129,780Total$714,140
Tax Record2024$8,825 ($735 / month)
Home Facts
Beds0Lot Size22,651 SqFtStyleSingle Family ResidenceZoningR-12CountyFAIRFIELDAPNGREE M:08 B:2718/S

Schools near 9 Walnut Street

This home is within Greenwich School District.
Rating
School
Type
Grades
Distance
Public - K to 5
Public - 6 to 8
Public - 9 to 12
Rating
School
Distance
North Mianus School
PublicK to 5

Eastern Middle School
Public6 to 8

Greenwich High School
Public9 to 12

School ratings and boundaries are provided by GreatSchools.org and Pitney Bowes. This information should only be used as a reference. Proximity or boundaries shown here are not a guarantee of enrollment. Please reach out to schools directly to verify all information and enrollment eligibility.

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9 Walnut Street is a 0.52 ac of land for sale in Cos Cob, CT 06807. This property was listed for sale on October 27, 2025 by BHHS New England Properties, it's currently listed at $1,575,000. This listing's school district is Greenwich School District. Nearby schools include North Mianus School, Eastern Middle School and Greenwich High School. 9 Walnut Street is a 3-bed, 1-bath, 1,482 sqft 0.52 ac of land built in 1970 on a 22,651 sq. ft. / 0.52 acres lot.

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Listing Courtesy of BHHS New England Properties, Peter Janis

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