21 Calhoun Drive
Greenwich, Connecticut 06831
- Beds
- 5
- Baths
- 6 | 2
- SqFt
- 6,143
- Acres
- 1.80
- Year Built
- 1923
- Property Type
- Single Family

Matt Caiola
Luxury Real Estate Advisor
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About This Home
A rare opportunity in one of Greenwich's most coveted in-town settings, 21 Calhoun Drive combines the timeless presence and character of a classic Greenwich estate with exceptional privacy, generous scale and remarkable potential. Set amid mature landscaping on approximately 1.8 acres in a one-acre zone, the property offers nearly twice the typical lot size while remaining just moments from the heart of Greenwich. Inside, gracious entertaining rooms, comfortable everyday living spaces and distinctive architectural details create a home with warmth, character and a sense of permanence rarely replicated today. A newly renovated kitchen brings a fresh, modern sensibility to the residence and serves as a beautiful centerpiece for daily living and entertaining. A private wellness retreat, complete with an indoor pool and dedicated fitness space, brings resort-style amenities into the comfort and privacy of home. Beyond the main residence, the expansive grounds offer an exceptional opportunity to further enhance the estate. Fully permitted plans provide the option to add a Cottage, along with the potential for a pickleball or tennis court an increasingly rare offering this close to town. With its substantial acreage, established landscaping, private wellness amenities and extraordinary flexibility for the future, this is a unique opportunity to enjoy a private estate setting without sacrificing the convenience of in-town Greenwich living.
Key Facts
- City/Town
- Greenwich
- Neighborhood
- N/A
- Property / Style
- Single Family · Tudor
- Year Built
- 1923
- Days on Market
- 54 days
- Beds
- 5
- Baths
- 6 full · 2 half
- Living Area
- 6,143 sq ft
- Lot Size
- 1.80 acres
- Garage / Parking
- 3 garage
- Property Taxes
- $37,450 / Annually
- HOA Fee
- $1,600 / Annually
Market Snapshot
The Greenwich Market
Single Family · trailing 12 months
Active Listings
47
24 under contract
Median List Price
$3.60M
47 active listings
Median Closed Price
$2.58M
207 sales
Median Days on Market
50
47 active listings
Median $ / Sq Ft
$889
47 active listings
Sale-to-List Ratio
101.3%
207 sales
How this home compares
List Price
$6.15M
vs $3.60M median
70.9% above median
Price / Sq Ft
$1,001
vs $889 median
12.6% above median
Days on Market
54 days
vs 50 days median
4 days longer than median
Based on 47 active and 207 closed sales (trailing 12 mo) of single family in Greenwich. Source: SmartMLS · As of November 2, 2026.
Location
21 Calhoun Drive, Greenwich, Connecticut
Estimate Your Payment
Estimated Monthly Payment
Rates: Freddie Mac PMMS via FRED · Updated Oct 29, 2026per month
- Principal & Interest$33,530
- Property Taxes$3,121
- Insurance$2,050
- HOA$133
Estimates only. Actual rates, taxes, insurance, and HOA fees vary. Consult a lender for current rates.
Location
- City/Town
- Greenwich
- Neighborhood
- N/A
- County
- Fairfield
Residence
- Property Type
- Single Family
- Style
- Tudor
- Year Built
- 1923
- New Construction
- No/Resale
- Living Area
- 6,143 sq ft
Schools
- Elementary
- Glenville
- High
- Greenwich
Interior
- Heating
- Hot Water
- Heat Fuel
- Natural Gas
- Cooling
- Central Air
- Fireplaces
- 6
- Laundry
- Lower LevelMain Level
- Appliances
- Gas RangeWall OvenMicrowaveRefrigeratorFreezerDishwasherWine Chiller
- Basement
- Full
Exterior & Lot
- Lot Size
- 1.80 acres
- Zoning
- RA-1
- Garage / Parking
- 3 garage spacesAttached Garage
- Waterfront Details
- Not Applicable
- Water Source
- Public Water Connected
- Sewer
- Septic
- Pool
- Indoor Pool
- Construction
- BrickStucco
- Roof
- ShingleSlate
- Foundation
- Stone
- Exterior Features
- Patio
- Lot Description
- Level Lot
HOA / Association
- Fee
- $1,600 / Annually
Listing & Financials
- Property Taxes
- $37,450 / Annually
- Days on Market
- 54
- MLS #
- 24205524
- MLS Status
- Active
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This information is believed to be accurate, but without warranty.
The IDX display contains information sourced from SmartMLS, Inc. as of 11/2/2026. This information is provided for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing or leasing. Data is deemed reliable but is not guaranteed accurate by the MLS, the listing broker, the listing agent, or Matt Caiola. Buyers and tenants should independently verify all information that matters to their decision.
Map locations may be approximate. Any offer of compensation, if applicable, is made only to participants of the MLS where the listing is filed. ©2026 Smart MLS, Inc. All rights reserved.
Data last updated on 11/2/2026 at 9:15 PM UTC.