Buildable Lot with Existing
For Sale
$1,495,000
9 Walnut Street, Cos Cob, CT 06807
0.52-acre lot with plans for a 4,200 sq. ft. home.
Property Size1,482 SF
Lot Size0.52 Acres
Price / SF$1,008
Days on Market287
Property Features for 9 Walnut Street
General Information
Standard status
Active
Size
1,482 SF
Lot size
0.52 Acres
Property subtype
Land or Vacant Lot
Taxes and HOA fees
Annual Taxes
$7,487
Amenities
Heating Heating
Hot Water Heating
Level
Natural Gas Heating
Building Details
Year Built
1970
Listing Agency:
BHHS NEW ENGLAND PROPERTIES
(203) 869-0500
Listed By:
PETER JANIS
Source:
Corcoran
Added: Oct 27, 2025
Changed: Aug 8
Last Checked: Jul 16 at 6:55AM
Displayed information is deemed reliable but is not guaranteed and should be independently verified. All listing content including descriptions, pricing, images are the copyrighted material of BHHS NEW ENGLAND PROPERTIES
Investment Insights
Based on property information with market context.
Located in the North Mianus neighborhood, this 0.52-acre property is situated at the end of a private road. The lot is fully entitled with plans to construct a 4,200 sq. ft. custom home. The property also features an existing 1-bedroom, 1-bathroom cottage that is grandfathered in. This cottage can be used for rental income, as a guest house, or as an in-law suite during the construction of the main home. The property is located within the North Mianus Elementary and Eastern Middle School districts.
Key Highlights
- .52‑acre buildable lot in desirable North Mianus neighborhood.
- Fully entitled with plans for a 4,200 sq. ft. custom home.
- Existing 1‑bedroom, 1‑bathroom cottage grandfathered in.
Property Analytics
Property Profile
Current Use
Location Intelligence
Trade Area within ½ mile
77
Businesses Nearby
Explore this area
Business Placement
Demographics for 06807, CT
7,197
Population
2,881
Households
2.5
Avg Household Size
43
Median Age
73%
College-Educated
96%
High-School Grad
3.3 sq mi
ZIP Area
2,181
Density / Sq Mi
$194,492
Median Household Income
$95,777
Median Earnings
$2,622
Median Rent
$1,228,000
Median Home Value
Questions? Ask Rey
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Frequently Asked Questions
What type of property is this?
Residential land & home lot - 0.52-acre lot with plans for a 4,200 sq. ft. home.
Where is this residential land & home lot located?
The property is located at 9 Walnut Street Cos Cob, CT.
What is the asking price?
The asking price for this property is $1,495,000.
What are key features of this property?
This property features: .52‑acre buildable lot in desirable North Mianus neighborhood.; Fully entitled with plans for a **4,200 sq. ft. custom home**.; Existing 1‑bedroom, 1‑bathroom cottage grandfathered in.
