21 Clarkson Lane
Killingworth, Connecticut 06419
- Beds
- 5
- Baths
- 4 | 1
- SqFt
- 4,190
- Acres
- 4.30
- Year Built
- 2006
- Property Type
- Single Family

Matt Caiola
Luxury Real Estate Advisor
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About This Home
Welcome to 21 Clarkson Lane. Set at the end of a coveted cul-de-sac and surrounded by approximately five acres of extraordinary privacy, 21 Clarkson Lane is a rare Connecticut estate offering an exceptional combination of refined living, resort-style amenities, and remarkable future possibilities. The property encompasses two separate building lots, including an approximately 1.9-acre approved buildable lot that is already established and does not require subdivision. Whether envisioned for a future residence, guest house, equestrian use, tennis court, additional acreage, or simply treasured open space, this offering provides a level of flexibility seldom found in the marketplace. A CONNECTICUT COUNTRY SETTING Stone walls, pastoral views, mature landscaping, and exceptional privacy create an idyllic country retreat. The grounds have been thoughtfully designed for both everyday enjoyment and memorable entertaining. A spectacular pool, new bluestone patio, and beautifully appointed outdoor kitchen create a private resort-like environment. A large fenced garden offers abundant space for fruits and vegetables, complemented by an established orchard. The impressive multi-purpose barn adds another dimension-ideal for outdoor toys and equipment, or easily imagined as a studio, pool house, game room, workshop, or creative retreat.
Key Facts
- City/Town
- Killingworth
- Neighborhood
- N/A
- Property / Style
- Single Family · Colonial
- Year Built
- 2006
- Days on Market
- 0 days
- Beds
- 5
- Baths
- 4 full · 1 half
- Living Area
- 4,190 sq ft
- Lot Size
- 4.30 acres
- Garage / Parking
- 3 garage · 6 total
- Property Taxes
- $17,743 / Annually
Market Snapshot
The Killingworth Market
Single Family · trailing 12 months
Active Listings
13
8 under contract
Median List Price
$825,000
13 active listings
Median Closed Price
$650,000
67 sales
Median Days on Market
47
13 active listings
Median $ / Sq Ft
$311
13 active listings
Sale-to-List Ratio
100.0%
67 sales
How this home compares
List Price
$2.25M
vs $825,000 median
2.7× the median
Price / Sq Ft
$537
vs $311 median
72.7% above median
Days on Market
0 days
vs 47 days median
47 days fresher than median
Based on 13 active and 67 closed sales (trailing 12 mo) of single family in Killingworth. Source: SmartMLS · As of August 14, 2026.
Location
21 Clarkson Lane, Killingworth, Connecticut
Estimate Your Payment
Estimated Monthly Payment
Rates: Freddie Mac PMMS via FRED · Updated Aug 13, 2026per month
- Principal & Interest$11,579
- Property Taxes$1,479
- Insurance$750
- HOA$0
Estimates only. Actual rates, taxes, insurance, and HOA fees vary. Consult a lender for current rates.
Location
- City/Town
- Killingworth
- Neighborhood
- N/A
- County
- Middlesex
Residence
- Property Type
- Single Family
- Style
- Colonial
- Year Built
- 2006
- New Construction
- No/Resale
- Living Area
- 4,190 sq ft
Schools
- Elementary
- Killingworth
- Middle
- Per Board of Ed
- High
- Haddam-Killingworth
Interior
- Heating
- Heat PumpGravity Warm AirSolarZoned
- Heat Fuel
- ElectricPropane
- Cooling
- Central AirZoned
- Fireplaces
- 3
- Laundry
- Upper Level
- Laundry Location
- Main
- Appliances
- Gas RangeSubzeroWasherDryerWine Chiller
- Basement
- FullFully Finished
- In-Law Apartment
- PossibleSeparate Entry
- Interior Features
- Open Floor Plan
Exterior & Lot
- Lot Size
- 4.30 acres
- Zoning
- R-02
- Garage / Parking
- 3 garage spaces6 total parking spacesAttached GarageDrivewayPavedPrivatePaved
- Waterfront Details
- Not Applicable
- Water Source
- Private Water System
- Sewer
- Septic
- Flood Zone
- No
- Pool
- In Ground Pool
- Construction
- Vinyl SidingWood
- Color
- White
- Roof
- Asphalt Shingle
- Foundation
- Concrete
- Lot Description
- SecludedBorders Open SpaceDryLevel LotProfessionally LandscapedOpen Lot
Listing & Financials
- Property Taxes
- $17,743 / Annually
- Days on Market
- 0
- MLS #
- 24197967
- MLS Status
- Active
- Financing
- FHA,VA,CHFA,USDA
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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 8/14/2026. 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 8/14/2026 at 3:50 AM UTC.