At the end of a cul-de-sac off Round Hill Road in back-country Greenwich awaits 66 Sumner, a 4+ acre property with private auto-gate, tennis court, pool and a canopy of specimen trees. This Mid-Century Modern home was constructed by global architectural firm Spector Group with interiors by John Saladino, one of the world's most distinguished and respected designers. 4-bedrooms, 6.5 baths, and 5,500+ SF of open living space featuring high ceilings and floor-to-ceiling windows throughout. The property is completely fenced and surrounded by a buffer of 3+ acres of wetlands for utmost privacy. Pool bath and changing rooms. New siding and decking. Generator. Unique opportunity to reimagine an architectural masterpiece nestled in a private oasis only 45 min. from NYC.
Sold for $2,900,000 on 07/15/25
$2,900,000
66 Sumner Rd, Greenwich, CT 06831
4beds
5,479sqft
Residential, Single Family Residence
Built in 1979
4.22 Acres Lot
$2,946,800 Zestimate®
$529/sqft
$8,062 Estimated rent
Home value
$2,946,800
$2.65M - $3.27M
$8,062/mo
Zestimate® history
Loading...
Owner options
Explore your selling options
What's special
Zillow last checked: 8 hours ago
Listing updated: July 17, 2025 at 12:33pm
Listed by:
Amy Balducci 917-318-7841,
Compass Connecticut, LLC
Bought with:
Drew Peterson, REB.0758835
Coldwell Banker Realty
Source: Greenwich MLS, Inc.,MLS#: 120871
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 4
- Bathrooms: 6
- Full bathrooms: 5
- 1/2 bathrooms: 1
Heating
- Forced Air, Propane
Cooling
- Central Air
Features
- Cedar Closet(s), Built-in Features
- Basement: Finished
- Number of fireplaces: 1
Interior area
- Total structure area: 5,479
- Total interior livable area: 5,479 sqft
Property
Parking
- Total spaces: 3
- Parking features: Electric Gate
- Garage spaces: 3
Features
- Has private pool: Yes
Lot
- Size: 4.22 Acres
- Features: Adjcnt Conservation, Wooded
Details
- Parcel number: 103290
- Zoning: RA-4
- Other equipment: Generator
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Post Modern
- Property subtype: Residential, Single Family Residence
Materials
- Wood Siding
- Roof: Composition
Condition
- Year built: 1979
Utilities & green energy
- Sewer: Septic Tank
- Water: Well
- Utilities for property: Propane
Community & neighborhood
Security
- Security features: Security System
Location
- Region: Greenwich
Price history
| Date | Event | Price |
|---|---|---|
| 7/15/2025 | Sold | $2,900,000-14.6%$529/sqft |
Source:  Greenwich MLS, Inc. #120871 | ||
| 6/13/2025 | Pending sale | $3,395,000$620/sqft |
Source: Greenwich MLS, Inc. #120871 | ||
| 5/19/2025 | Contingent | $3,395,000$620/sqft |
Source: Greenwich MLS, Inc. #120871 | ||
| 4/2/2025 | Price change | $3,395,000-9.5%$620/sqft |
Source: Greenwich MLS, Inc. #120871 | ||
| 1/16/2025 | Listed for sale | $3,750,000$684/sqft |
Source: Greenwich MLS, Inc. #120871 | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2026 | $19,312 +2.8% | $1,603,980 |
| 2025 | $18,783 +2.8% | $1,603,980 |
| 2024 | $18,269 +1% | $1,603,980 |
Find assessor info on the county website
Neighborhood: 06831
Nearby schools
GreatSchools rating
- 9/10Parkway SchoolGrades: K-5Distance: 1.4 mi
- 7/10Western Middle SchoolGrades: 6-8Distance: 7.8 mi
- 10/10Greenwich High SchoolGrades: 9-12Distance: 6.7 mi
Schools provided by the listing agent
- Elementary: Parkway
- Middle: Western
Source: Greenwich MLS, Inc.. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.
Sell for more on Zillow
Get a free Zillow Showcase℠ listing and you could sell for .
$2,946,800
2% more+ $58,936
With Zillow Showcase(estimated)
$3,005,736