9 Walnut St Cos Cob, CT 06807
Estimated payment $9,036/month
Highlights
- Guest House
- Colonial Architecture
- Hot Water Heating System
- North Mianus School Rated A+
- Cul-De-Sac
- Level Lot
About This Lot
.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
Property Type
- Land
Est. Annual Taxes
- $8,825
Year Built
- Built in 1970
Lot Details
- 0.52 Acre Lot
- Property fronts a private road
- Cul-De-Sac
- Level Lot
- Property is zoned R-12
Home Design
- 1,482 Sq Ft Home
- Colonial Architecture
- Wood Siding
Bedrooms and Bathrooms
- 3 Bedrooms
- 1 Full Bathroom
Additional Homes
- Residence on Property
- Guest House
Utilities
- Heating System Uses Natural Gas
- Hot Water Heating System
- Gas Available
Listing and Financial Details
- Assessor Parcel Number 08-2718/S
Map
Home Values in the Area
Average Home Value in this Area
Tax History
| Year | Tax Paid | Tax Assessment Tax Assessment Total Assessment is a certain percentage of the fair market value that is determined by local assessors to be the total taxable value of land and additions on the property. | Land | Improvement |
|---|---|---|---|---|
| 2021 | $8,096 | $641,340 | $480,270 | $161,070 |
Property History
| Date | Event | Price | List to Sale | Price per Sq Ft | Prior Sale |
|---|---|---|---|---|---|
| 10/27/2025 10/27/25 | For Sale | $1,575,000 | +54.4% | $1,063 / Sq Ft | |
| 07/10/2025 07/10/25 | Sold | $1,020,000 | -11.3% | $688 / Sq Ft | View Prior Sale |
| 03/06/2025 03/06/25 | Pending | -- | -- | -- | |
| 02/12/2025 02/12/25 | For Sale | $1,150,000 | -- | $776 / Sq Ft |
Source: Greenwich Association of REALTORS®
MLS Number: 123887
APN: GREE M:08 B:2718/S
Disclaimer: Certain information contained herein is derived from information provided by parties other than Homes.com. All information provided is deemed reliable, but is not guaranteed to be accurate and should be independently verified.
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.
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