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21 Clarkson Lane

Killingworth, Connecticut 06419

ACTIVE - NEW$2,250,000
Beds
5
Baths
4 | 1
SqFt
4,190
Acres
4.30
Year Built
2006
Matt Caiola

Matt Caiola

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Pool3-Car Garage3 Fireplaces

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

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

Property + 12 nearby

Estimate Your Payment

Estimated Monthly Payment

Rates: Freddie Mac PMMS via FRED
$13,808

per 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

Similar Properties

Homes with a close match in area, property type, and price.

Listed By

Tracee Adams

(860) 876-7358

William Raveis Real Estate

(860) 536-2600

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.