Skip main navigation
For sale
    • Price cut: $255K (9/16)
    $1,995,000

    21 Clarkson Lane, Killingworth, CT 06419

    5beds
    4,190sqft
    : 
    $13,332/mo
    Get pre-qualified
    Single Family Residence
    Built in 2006
    2.4 Acres Lot
    $1,873,900 Zestimate®
    $476/sqft
    $-- HOA

    What's special

    Stone wallsImpressive multi-purpose barnExquisite inlaid wood floorsGenerously proportioned roomsExceptional privacyPastoral viewsNew bluestone patio
    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 current property encompasses two separate building lots. The main house is on 2.4 acres, and the adjacent 1.9 acre lot may be purchased in addition to this home. 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. 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. (Check out Video Link her; https://vimeo.com/manage/videos/1223099701)
    59 days
    618
    31

    Zillow last checked:

    Listing updated:

    Listed by:

    Tracee Adams (860)876-7358,

    William Raveis Real Estate 860-536-2600

    Source: Smart MLS,MLS#: 24197967MLS Logo

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 5
      • Bathrooms: 6
      • Full bathrooms: 4
      • 1/2 bathrooms: 2
      Primary bedroom
      • Features: Skylight, Fireplace, Full Bath, Interior Balcony, Walk-In Closet(s), Hardwood Floor
      • Level: Upper
      • Area: 273 Square Feet
      • Dimensions: 13 x 21
      Bedroom
      • Features: High Ceilings, Hardwood Floor
      • Level: Upper
      • Area: 143 Square Feet
      • Dimensions: 11 x 13
      Bedroom
      • Features: High Ceilings, Hardwood Floor
      • Level: Upper
      • Area: 182 Square Feet
      • Dimensions: 14 x 13
      Bedroom
      • Features: High Ceilings, Hardwood Floor
      • Level: Upper
      • Area: 143 Square Feet
      • Dimensions: 11 x 13
      Bedroom
      • Features: High Ceilings, Wall/Wall Carpet
      • Level: Other
      • Area: 676 Square Feet
      • Dimensions: 26 x 26
      Dining room
      • Features: High Ceilings, French Doors, Hardwood Floor
      • Level: Main
      • Area: 210 Square Feet
      • Dimensions: 14 x 15
      Great room
      • Features: Wet Bar, Entertainment Center, Gas Log Fireplace
      • Level: Upper
      • Area: 930 Square Feet
      • Dimensions: 30 x 31
      Kitchen
      • Features: High Ceilings, Granite Counters, Wet Bar, Kitchen Island
      • Level: Main
      • Area: 216 Square Feet
      • Dimensions: 12 x 18
      Living room
      • Features: High Ceilings, Gas Log Fireplace, Hardwood Floor
      • Level: Main
      • Area: 325 Square Feet
      • Dimensions: 13 x 25
      Office
      • Features: High Ceilings, French Doors, Hardwood Floor
      • Level: Main
      • Area: 210 Square Feet
      • Dimensions: 14 x 15
      Rec play room
      • Level: Lower
      • Area: 420 Square Feet
      • Dimensions: 14 x 30
      Heating
      • Solar, Geothermal
      Cooling
      • Ceiling Fan(s), Central Air, Zoned
      Appliances
      • Included: Gas Range, Subzero, Washer, Dryer, Wine Cooler, Water Heater, Tankless Water Heater
      • Laundry: Upper Level
      Features
      • Open Floorplan, Smart Thermostat
      • Basement: Full,Finished
      • Number of fireplaces: 3
      Interior area
      • Total structure area: 4,190
      • Total interior livable area: 4,190 sqft
      • Finished area above ground: 4,190
      Video & virtual tour

      Property

      Parking
      • Total spaces: 6
      • Parking features: Attached, Paved, Driveway, Private
      • Attached garage spaces: 3
      • Has uncovered spaces: Yes
      Features
      • Has private pool: Yes
      • Pool features: In Ground
      Lot
      • Size: 2.4 Acres
      • Features: Secluded, Borders Open Space, Dry, Level, Landscaped, Open Lot
      Details
      • Parcel number: 2489260
      • Zoning: R-02
      • Other equipment: Generator

      Construction

      Type & style
      • Home type: SingleFamily
      • Architectural style: Colonial
      • Property subtype: Single Family Residence
      Materials
      • Vinyl Siding, Wood Siding
      • Foundation: Concrete Perimeter
      • Roof: Asphalt
      Condition
      • New construction: No
      • Year built: 2006

      Utilities & green energy

      • Sewer: Septic Tank
      • Water: Private
      Green energy
      • Green verification: ENERGY STAR Certified Homes
      • Energy efficient items: HVAC, Thermostat
      • Energy generation: Solar

      Community & HOA

      Community
      • Features: Golf, Health Club, Medical Facilities, Shopping/Mall, Tennis Court(s)
      HOA
      • Has HOA: No
      Location
      • Region: Killingworth

      Financial & listing details

      • Price per square foot: $476/sqft
      • Tax assessed value: $669,900
      • Annual tax amount: $19,072
      • Date on market: 8/13/2026

        Estimated market value

        $1,873,900

        $1.78M - $1.97M

        $5,430/mo

        Price history

        DateEventPrice
        9/16/2026Price change$1,995,000-11.3%$476/sqft
        Source: Smart MLS #24197967 Report a problem
        8/13/2026Listed for sale$2,250,000$537/sqft
        Source: Smart MLS #24197967 Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2025$1,839 +8.2%$70,140
        2024$1,699 +3.2%$70,140
        2023$1,646 +1%$70,140
        2022$1,629 -26.7%$70,140 -15.7%
        2021$2,222 $83,160
        2020$2,222 -2.7%$83,160
        2019$2,284 $83,160
        2018$2,284 $83,160
        2017$2,284 -30%$83,160 -34%
        2016$3,262 $126,000
        Find assessor info on the county website

        Monthly payment

        Est. payment

        Payment breakdown

        Explore the cost of this home by adjusting the details. Changes won't be saved.
        All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.
        HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.
        See how much you could borrow to make a competitive offer.
        Get pre-qualified

        Climate risks

        Neighborhood: 06419

        Getting around

        16 / 100
        Car-Dependent
        13 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating
        Schools provided by the listing agent
        • Elementary: Killingworth
        • High: Haddam-Killingworth

        Source: Smart MLS. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.

        A local agent can set up tours, give advice and negotiate with sellers.

        Browse local experts

        Similar homes

              Nearby cities

              Nearby zip codes

              Other Killingworth Topics

                Search
                Updates
                Favorites
                Plan
                Inbox