Introducing a timeless Round Hill estate, on the market for the first time in over 50 years. Nestled midway along a quiet cul-de-sac, this pastoral property spans over 10+ sweeping, private acres with mature plantings and specimen tress overlooking a tranquil pond. The main residence features beautifully proportioned, sun-filled rooms, 5 bedrooms, 4 full and 2 half baths, and a walk-out lower level that opens to a terrace and pool. Additional highlights include a greenhouse, a 6-stall barn with lounge, tack room, staff apartment, and expansive paddocks with easy access to Greenwich riding trails. An exceptional offering in the heart of Round Hill providing an opportunity to renovate or build your own dream home —experience the privacy and legacy of this remarkable estate.
Sold for $6,200,000
$6,200,000
21 Aiken Rd, Greenwich, CT 06831
5beds
6,714sqft
Residential, Single Family Residence
Built in 1957
10.37 Acres Lot
$6,509,600 Zestimate®
$923/sqft
$23,891 Estimated rent
Home value
$6,509,600
$5.86M - $7.23M
$23,891/mo
Zestimate® history
Owner options
List your home for rent
$23,891/mo
Rent Zestimate®
Find your next renter with Zillow Rental Manager. Plus, with online applications, you can quickly screen prospective tenants – for free.
$23,891/mo
Rent Zestimate®
Refinance and save
$34,943/mo
Est. payment
Refinancing to a lower rate could help reduce your monthly payments and save thousands over the life of the loan.
$34,943/mo
Est. payment
Explore your selling options
Work with a Zillow partner agent
Leverage their expertise and Zillow's premium Showcase listings to get your home seen by more buyers.
Get startedList with your own agent
Get your home in front of millions of buyers by listing it on Zillow.
Learn how to do itSell it yourself
Take full control of how buyers see your home on Zillow by listing For Sale by Owner (FSBO).
List your homeWhat's special
Sun-filled roomsTranquil pondWalk-out lower levelTerrace and poolPastoral propertyQuiet cul-de-sacMature plantings
Zillow last checked:
Listing updated:
Listed by:
Krissy Blake 203-536-2743,
Sotheby's International Realty
Bought with:
Krissy Blake, RES.0765419
Sotheby's International Realty
Source: Greenwich MLS, Inc.,MLS#: 122813
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 5
- Bathrooms: 6
- Full bathrooms: 4
- 1/2 bathrooms: 2
Heating
- Hot Water
Cooling
- Wall Unit(s)
Appliances
- Laundry: Laundry Room
Features
- Eat-in Kitchen, Sep Shower
- Basement: Finished
- Number of fireplaces: 3
Interior area
- Total structure area: 6,714
- Total interior livable area: 6,714 sqft
Property
Parking
- Total spaces: 3
- Parking features: Garage Door Opener
- Garage spaces: 3
Features
- Patio & porch: Terrace
- Has private pool: Yes
Lot
- Size: 10.37 Acres
- Features: Meadow, Parklike
Details
- Additional structures: Stable(s), Staff Quarters
- Parcel number: 102375
- Zoning: RA-4
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Ranch
- Property subtype: Residential, Single Family Residence
Materials
- Brick
- Roof: Asphalt
Condition
- Year built: 1957
Utilities & green energy
- Sewer: Septic Tank
- Water: Well
- Utilities for property: Propane
Community & HOA
Location
- Region: Greenwich
Financial & listing details
- Price per square foot: $923/sqft
- Tax assessed value: $2,406,180
- Annual tax amount: $28,972
- Date on market: 5/17/2025
- Inclusions: Washer/Dryer, All Kitchen Applncs
Price history
| Date | Event | Price |
|---|---|---|
| 12/12/2025 | Sold | $6,200,000-14.5%$923/sqft |
Source:  Greenwich MLS, Inc. #122813 Report a problem | ||
| 9/2/2025 | Pending sale | $7,250,000$1,080/sqft |
Source: Greenwich MLS, Inc. #122813 Report a problem | ||
| 8/22/2025 | Contingent | $7,250,000$1,080/sqft |
Source: Greenwich MLS, Inc. #122813 Report a problem | ||
| 5/17/2025 | Listed for sale | $7,250,000$1,080/sqft |
Source: Greenwich MLS, Inc. #122813 Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2025 | $28,970 +2.8% | $2,406,180 |
| 2024 | $28,176 +2.8% | $2,406,180 |
| 2023 | $27,406 +1% | $2,406,180 |
| 2022 | $27,142 -2.9% | $2,406,180 -0.2% |
| 2021 | $27,939 | $2,410,590 |
| 2020 | $27,939 -0.8% | $2,410,590 |
| 2019 | $28,156 +2.7% | $2,410,590 |
| 2018 | $27,408 | $2,410,590 |
| 2017 | $27,408 -14.6% | $2,410,590 -15.3% |
| 2015 | $32,079 +2.7% | $2,846,410 |
| 2014 | $31,225 +2.7% | $2,846,410 |
| 2013 | $30,400 -2.9% | $2,846,410 |
| 2012 | $31,311 +8.8% | $2,846,410 |
| 2011 | $28,777 -12.4% | $2,846,410 -25.6% |
| 2010 | $32,852 +3.4% | $3,824,450 |
| 2009 | $31,781 +3.4% | $3,824,450 |
| 2008 | $30,749 +3.6% | $3,824,450 |
| 2007 | $29,678 +3.5% | $3,824,450 |
| 2006 | $28,683 -15.6% | $3,824,450 +29.5% |
| 2005 | $33,986 +3.5% | $2,952,740 |
| 2004 | $32,834 +3.4% | $2,952,740 |
| 2003 | $31,742 +45.6% | $2,952,740 +153.3% |
| 2001 | $21,797 +5.6% | $1,165,640 |
| 2000 | $20,632 -1.8% | $1,165,640 +2.9% |
| 1999 | $21,006 | $1,132,390 |
Find assessor info on the county website
Neighborhood: 06831
Nearby homes
- $10,611,6005 bd11 ba11k sqft17 Aiken Rd, Greenwich, CT 06831Off Market
- $6,400,0004 bd5 ba6.8k sqft39 Aiken Rd, Greenwich, CT 06831Sold
- $11,500,000-- bd-- ba-- sqft39 Aiken Rd, Greenwich, CT 06831Sold
- $4,023,3904 Acres37 Aiken Road, Greenwich, CT 06830Off Market
- $4,839,4004 bd4 ba3.7k sqft46 Wilshire Rd, Greenwich, CT 06831Off Market
- $--4 Acres15 Aiken Rd, Greenwich, CT 06831Off Market
- $11,323,9008 bd10 ba18k sqft13 Aiken Rd, Greenwich, CT 06831Off Market
- $5,569,1005 bd8 ba8.1k sqft15 Close Rd, Greenwich, CT 06831Off Market
Nearby schools
GreatSchools rating
- 10/10Parkway SchoolGrades: K-5Distance: 0.6 mi
- 8/10Western Middle SchoolGrades: 6-8Distance: 7.4 mi
- 10/10Greenwich High SchoolGrades: 9-12Distance: 6 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 Zillow Showcase℠ listing at no additional cost and you could sell for .
$6,509,600
2% more
+$130K
With Zillow Showcase(estimated)
$6,639,792
- Connecticut
- Fairfield County
- Greenwich
- 06831
- 21 Aiken Rd
Nearby cities
Nearby neighborhoods
Nearby zip codes
Other Greenwich Topics
