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New construction
    • Price cut: $188K (9/3)
    $5,499,999

    20 Knollwood Road, Brookville, NY 11545

    6beds
    7,000sqft
    Single Family Residence, Residential
    Built in 2026
    2 Acres Lot
    $-- Zestimate®
    $786/sqft
    $-- HOA

    What's special

    Expansive porcelain patioTrue resort-style backyardSoaring ceilingsDual oversized islandsBespoke millworkCustom panelingGrand foyer
    EXCEPTIONAL NEW CONSTRUCTION! Luxury Living at it's finest! Welcome to 20 Knollwood Road, Muttontown in the Jericho School District. Experience the pinnacle of luxury living in this newly built estate, offering approximately 7,000 square feet of refined design and superior craftsmanship by a highly regarded builder. Every inch of this home reflects meticulous attention to detail, from the bespoke millwork and custom paneling to the soaring ceilings and elegant herringbone flooring. A striking custom iron entry door welcomes you into a grand foyer, setting the stage for the home’s sophisticated yet inviting ambiance. The chef’s kitchen is a showstopper, featuring dual oversized islands, premium Sub-Zero and Wolf appliances, and effortless flow into formal and casual living spaces. Entertain with ease in the formal dining room or at the beautifully appointed wet bar with wine refrigeration. Designed for seamless indoor-outdoor living, French doors open to an expansive porcelain patio and a true resort-style backyard. Enjoy a fully outfitted outdoor kitchen, heated gunite pool with spa, and lush surroundings perfect for entertaining or relaxing in privacy. This impressive residence includes 6 generously sized bedrooms, all with en-suite baths, and a total of 7.5 designer bathrooms. The primary suite offers a luxurious retreat with spa-like finishes. Additional highlights include radiant heated bathroom floors, whole-house generator, central vacuum, Pella windows, circular driveway, and a sprawling lower level complete with a full bath and direct backyard access. A rare offering combining scale, sophistication, and immediate occupancy in one of Long Island’s most desirable locations.
    149 days
    1,239
    78

    Zillow last checked:

    Listing updated:

    Listed by:

    LAFFEY REAL ESTATE 516-625-0944,

    Janet Berookhim CBR 516-263-7072

    Source: OneKey® MLS as distributed by MLS GRID,MLS#: 986988MLS Logo

      Facts & features

      Interior

      Bedrooms & bathrooms
      • Bedrooms: 6
      • Bathrooms: 8
      • Full bathrooms: 7
      • 1/2 bathrooms: 1
      Bedroom 1
      • Description: Large Bedroom Overlooking Backyard with En-Suite Bath
      • Level: First
      Bedroom 2
      • Description: Primary Suite with Private Balcony, 2 Closets and Designer Spa Bathroom
      • Level: Second
      Bedroom 3
      • Description: Additional 4 Bedrooms with En-Suite Full Bathrooms
      • Level: Second
      Bathroom 1
      • Description: Powder Room
      • Level: First
      Bathroom 2
      • Description: Full Bathroom with Access to the Backyard
      • Level: First
      Bathroom 3
      • Description: Full Bathroom
      • Level: Lower
      Other
      • Description: Huge Double Entry Foyer with Radiant Heated Floors
      • Level: First
      Basement
      • Description: High Ceilings with Many Egress Windows and Door Leading to Backyard and 2nd Laundry Room
      • Level: Lower
      Dining room
      • Description: Formal Dining Room with Wet Bar
      • Level: First
      Family room
      • Description: French Doors Opening up to Porcelain Tiled Patio Perfect for Indoor/Outdoor Entertaining with Outdoor Kitchen
      • Level: First
      Kitchen
      • Description: Designer Kitchen, 2 Islands, Subzero and Wolf Appliances
      • Level: First
      Laundry
      • Description: Laundry Room
      • Level: Second
      Living room
      • Description: Formal Living Room with French Doors
      • Level: First
      Heating
      • Forced Air, Propane, Radiant Floor
      Cooling
      • Central Air
      Appliances
      • Included: Cooktop, Dishwasher, Gas Cooktop, Gas Oven, Gas Range, Refrigerator, Wine Refrigerator
      • Laundry: Laundry Room
      Features
      • First Floor Bedroom, First Floor Full Bath, Cathedral Ceiling(s), Central Vacuum, Chefs Kitchen, Crown Molding, Entrance Foyer, Formal Dining, High Ceilings, His and Hers Closets, In-Law Floorplan, Kitchen Island, Marble Counters, Open Floorplan, Pantry, Walk-In Closet(s)
      • Flooring: Hardwood
      • Doors: ENERGY STAR Qualified Doors
      • Basement: Full
      • Attic: Full,Pull Stairs
      • Number of fireplaces: 1
      • Fireplace features: Electric
      Interior area
      • Total structure area: 7,000
      • Total interior livable area: 7,000 sqft
      Video & virtual tour

      Property

      Parking
      • Total spaces: 3
      • Parking features: Driveway, Garage
      • Garage spaces: 3
      • Has uncovered spaces: Yes
      Features
      • Levels: Tri-Level
      • Patio & porch: Patio
      • Has private pool: Yes
      • Pool features: Fenced, In Ground, Pool Cover, Pool/Spa Combo
      • Has spa: Yes
      Lot
      • Size: 2 Acres
      • Features: Back Yard, Cul-De-Sac, Front Yard, Landscaped, Level, Sprinklers In Front, Sprinklers In Rear
      Details
      • Parcel number: 242916B0015890
      • Special conditions: None

      Construction

      Type & style
      • Home type: SingleFamily
      • Architectural style: Colonial
      • Property subtype: Single Family Residence, Residential
      Materials
      • Brick
      Condition
      • New Construction
      • New construction: Yes
      • Year built: 2026

      Utilities & green energy

      • Sewer: Cesspool
      • Water: Public
      • Utilities for property: See Remarks

      Community & HOA

      HOA
      • Has HOA: No
      Location
      • Region: Glen Head

      Financial & listing details

      • Price per square foot: $786/sqft
      • Tax assessed value: $1,204,000
      • Date on market: 5/14/2026
      • Cumulative days on market: 150 days
      • Listing agreement: Exclusive Right To Sell

        Estimated market value

        Not available

        Estimated sales range

        Not available

        Not available

        Price history

        DateEventPrice
        9/3/2026Price change$5,499,999-3.3%$786/sqft
        Source: OneKey® MLS as distributed by MLS GRID #986988 Report a problem
        7/6/2026Price change$5,688,000-3.6%$813/sqft
        Source: OneKey® MLS as distributed by MLS GRID #986988 Report a problem
        5/14/2026Listed for sale$5,899,999-1.6%$843/sqft
        Source: OneKey® MLS as distributed by MLS GRID #986988 Report a problem
        3/11/2026Listing removed$5,995,999$857/sqft
        Source: Douglas Elliman #842292 Report a problem
        10/15/2025Price change$5,995,999-3.3%$857/sqft
        Source: OneKey® MLS as distributed by MLS GRID #842292 Report a problem
        9/17/2025Price change$6,199,000-1.6%$886/sqft
        Source: OneKey® MLS as distributed by MLS GRID #842292 Report a problem
        9/2/2025Price change$6,299,000-3.1%$900/sqft
        Source: OneKey® MLS as distributed by MLS GRID #842292 Report a problem
        4/22/2025Listed for sale$6,499,000+419.9%$928/sqft
        Source: OneKey® MLS as distributed by MLS GRID #842292 Report a problem
        5/5/2022Sold$1,250,000$179/sqft
        Source: Public Record Report a problem

        Public tax history

        YearProperty taxesTax assessment
        2024-- $1,204
        2023-- $1,204
        2022-- $1,204
        2021$22,143 +18.8%--
        2020$18,645 +12.4%$1,500
        2019$16,589 $1,500
        2018$16,589 +4.8%$1,500
        2017$15,835 +1.3%$1,500 -5.5%
        2016$15,629 +441.1%$1,588 -5.3%
        2015$2,888 +1%$1,676 -5%
        2013$2,859 -5.1%$1,764 -10.9%
        2012$3,012 -80.2%$1,980 -20.8%
        2011$15,241 -6.5%$2,500 -13.1%
        2010$16,308 $2,877 -11.5%
        2009-- $3,252 -6.2%
        2008-- $3,466 +1.4%
        2006-- $3,419 -36.2%
        2005-- $5,361 -43.8%
        2004-- $9,544 -7%
        2003-- $10,263 -42%
        2002-- $17,700
        2001-- $17,700
        2000-- $17,700
        Find assessor info on the county website

        Monthly payment

        Estimated monthly payment$1,822
        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.
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        Climate risks

        Neighborhood: 11545

        Getting around

        4 / 100
        Car-Dependent
        25 / 100
        Somewhat Bikeable

        Nearby schools

        GreatSchools rating
        Schools provided by the listing agent
        • Elementary: George A Jackson School
        • Middle: Jericho Middle School
        • High: Jericho Senior High School

        Source: OneKey® MLS as distributed by MLS GRID. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.

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