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$2,250,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 5 Beds
  • 4 Full Baths
  • 1 Partial Bath
  • 4,190 Sq. Ft.
  • 3 Car Garage
  • Updated 8 hours ago
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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.

Full Property Details for 21 Clarkson Ln

General

  • Price: $2,250,000
  • Taxes: (July 2025-June 2026)
  • Status: Active
  • Type: Single Family
  • Source: SMARTMLS
  • MLS ID: 24197967
  • Updated: 8/14/2026
  • Added to Site: 2 day(s) ago

Interior

  • Number of Rooms: 13
  • Interior Features: Open Floor Plan
  • Fireplace: Yes
  • Number of Fireplaces: 3
  • Appliances: Gas Range, Subzero, Washer, Dryer, Wine Chiller

Rooms

Bathrooms

  • Total Bathrooms: 5
  • Full Bathrooms: 4
  • Half Bathrooms: 1

Bedrooms

  • Total Bedrooms: 5
  • Primary Suite: Skylight, Fireplace, Full Bath, Interior Balcony, Walk, 21 x 13, Upper
  • Bedroom 1: Bedroom - 9 ft+ Ceilings, Wall/Wall Carpet, 26 x 26, Other
  • Bedroom 2: Bedroom - 9 ft+ Ceilings, Hardwood Floor, 13 x 11, Upper
  • Bedroom 3: Bedroom - 9 ft+ Ceilings, Hardwood Floor, 13 x 11, Upper
  • Bedroom 4: Bedroom - 9 ft+ Ceilings, Hardwood Floor, 13 x 14, Upper

Other Rooms

  • Living Room: Living Room - 9 ft+ Ceilings, Gas Log Fireplace, Hardwood Floor, 25 x 13, Main
  • Great Room: Great Room - Wet Bar, Entertainment Center, Gas Log Fireplace, 31 x 30, Upper
  • Kitchen: Kitchen - 9 ft+ Ceilings, Granite Counters, Wet Bar, Island, 18 x 12, Main
  • Dining Room: Dining Room - 9 ft+ Ceilings, French Doors, Hardwood Floor, 15 x 14, Main
  • Office: Office - 9 ft+ Ceilings, French Doors, Hardwood Floor, 15 x 14, Main
  • Game room: Yes
  • Game Room: Rec/Play Room, 30 x 14, Lower
  • Rec Room: 30 x 14, Lower
  • Laundry: Upper Level

Additional Information

  • Pool: Yes
  • Pool Description: In Ground Pool

Exterior

  • Color: White

Parking

  • Garage: Yes
  • Attached garage: Yes
  • Garage Spaces: 3
  • Total Spaces: 6
  • Parking: Attached Garage, Paved, Driveway

Location

  • County: Middlesex
  • Driving Directions: Beautiful drive off Rte. 9 or I-95

School Information

  • Elementary School: Killingworth
  • Middle School: Haddam-Killingworth
  • Intermediate School: Per Board of Ed
  • High School: Haddam-Killingworth

Heating & Cooling

  • Cooling Type: Ceiling Fans, Central Air, Zoned
  • Heating Type: Solar, Geothermal
  • Heating Fuel: Geothermal
  • Water Heater: Propane, Tankless Hotwater

Utilities

  • Sewer: Septic
  • Water: Private Water System

Structural Information

  • Architectural Style: Colonial
  • Construction Status: No/Resale
  • Exterior Const.: Vinyl Siding, Wood
  • Basement Desc.: Full, Fully Finished
  • Roof: Asphalt Shingle
  • Attic: Yes
  • Square Feet: 4,190
  • Above Ground: 4,190 Sq. Ft.
  • Year Built: 2006

Lot Features

  • Lot Size (Acres): 4.3
  • Driveway/Sidewalk: Private, Paved
  • Zoning: R-02
  • Lot Description: Secluded, Borders Open Space, Dry, Level Lot, Professionally Landscaped, Open Lot

Green Features

  • Energy Features: Energy Star Rated, Active Solar, Generator, Geothermal Heat, Programmable Thermostat

Financial Considerations

  • Assessment Amount: $669,000
  • Tax Year: July 2025-June 2026

Disclosures and Reports

  • Property ID: 2489260

Listed by William Raveis Real Estate, Tracee Adams

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Listing agent

— 21 Clarkson Ln —

  • Tracee Adams

    William Raveis Real Estate

Agent Contact: (860) 876-7358 Office Contact: (860) 536-2600

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 21 Clarkson Ln

School District:Regional School District 17
NameGradesDistance
Killingworth Elementary School
340 Route 81, Haddam, CT 06419
PK-31.9 mi
Haddam-Killingworth Intermediate School
451 Route 81, Killingworth, CT 06419
4-52.6 mi
Haddam-Killingworth Middle School
451 Route 81, Killingworth, CT 06419
6-82.6 mi
Haddam-Killingworth High School
95 Little City Road, Haddam, CT 06441
9-128.1 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 21 Clarkson Ln Get Price Alerts and Save Property

Date
Details
Price
Change
Source
8/13/2026
Listed
$2,250,000
144.83%
MLS
5/09/2006
Sold
$918,994
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 21 Clarkson Ln

Year
Property Taxes
Change
Tax Assessment
Change
2025
$17,743
8%
$676,690
—
2023
$16,389
5%
$676,690
2%
2023
$15,575
1%
$663,600
—
2022
$15,409
16%
$663,600
34%
2021
$13,229
—
$495,110
—
2020
$13,229
-3%
$495,110
—
2019
$13,601
—
$495,110
—
2018
$13,601
—
$495,110
—
2017
$13,601
-6%
$495,110
-12%
2016
$14,490
3%
$559,690
—
2015
$14,121
3%
$559,690
—
2014
$13,729
—
$559,690
—
2011
$13,729
—
$559,690
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

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*These costs are estimates, and the interest rates assume exceptional credit standing.

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Listed by William Raveis Real Estate, Tracee Adams

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21 Clarkson Lane, Killingworth, CT 06419 (MLS# 24197967) is a Single Family property with 5 bedrooms, 4 full bathrooms and 1 partial bathroom. 21 Clarkson Lane is currently listed for $2,250,000 and was received on August 13, 2026. Want to learn more about 21 Clarkson Lane? Do you have questions about finding other Single Family real estate for sale in Killingworth? You can browse all Killingworth real estate or contact a Coldwell Banker agent to request more information.

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