21 Clarkson Lane
Killingworth, CT, 06419 $ 2,250,000
Bedrooms5 Baths4.1 Sq 4,190 Monthly Estimate*
$ 14,207
for $2,250,000 with 5 bedrooms and 4 full baths, 1 half bath. This 4,190 square foot home was built in 2006 on a lot size of 4.3.
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. THE CUSTOM RESIDENCE Pristine, sophisticated, and exceptionally well maintained, the custom residence offers five bedrooms and three-and-a-half baths, exquisite inlaid wood floors, abundant natural light, and generously proportioned rooms. The chef's kitchen features premium Wolf and Sub-Zero appliances and opens naturally to the home's light-filled living spaces. The main level also includes a private office, sunroom, elegant dining room, mudroom, and laundry. A separate private entrance leads to an extraordinary recreation/theater room above the garage, currently finished with custom details. This versatile space offers excellent potential as an in-law, au pair, guest, or private suite while providing separation from the principal living areas. The third-floor finished attic provides two additional rooms and a shared full bath. A fully finished lower level adds a dedicated gym plus abundant closets and storage. MODERN EFFICIENCY Recent upgrades include a state-of-the-art solar and geothermal heating and cooling system, delivering exceptional energy efficiency and year-round comfort.
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FeaturesGeneralZoning R-02
Neighborhood N/A
County Middlesex
Tax Year July 2025-June 2026
Property Type Single Family For Sale
Status Active
Acres 4.3
Directions Beautiful drive off Rte. 9 or I-95
High School Haddam-Killingworth
City Killingworth
Elementary School Killingworth
Sq Ft Total 4190
DOM 0
Year Built 2006
Style Colonial
Year Built Source Public Records
Pool Description In Ground Pool
Energy Features Energy Star Rated Active Solar Generator Geothermal Heat Thermopane Windows
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InteriorCooling System Central Air Zoned
Total Rooms 13
Basement Description Full Fully Finished
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ExteriorWater Source Private Water System
Lot Description Secluded Borders Open Space Dry Level Lot Professionally Landscaped Open Lot
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* Excluded FeaturesList ByTracee AdamsListing Agent
William Raveis Real EstateBroker
tracee.adams@raveis.comEmail
Affordability Calculator
- Monthly Principal & Interest
- $14,207
- Monthly Property Taxes
- $1,479
- Monthly Home Insurance
- --
Default based on a 30-year fixed rate of 6.49% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
Learn more about how to save NearbySingle family listings in Killingworth, CT
Average List Price $855,645
Percent of Sale Price 62%
About Killingworth, CT 6,474 Population
8% Since 2002
$ 106,055 Median Income
51.33 Median Age
29% Households with Children
Trends Information provided by ATTOM Data Solutions.
1186837 Elementary School
1186823 Middle School
Haddam-Killingworth High School High School
Pricing History| Date | Price | Price Change | Description |
|---|
| 8/13/2026 | $2,250,000 | | Listed Price |