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Sold for $3,600,000
    • $3,600,000

    15 Emmet Drive, Head Of The Harbor, NY 11790

    11beds
    9,411sqft
    Single Family Residence, Residential
    Built in 1906
    4.1 Acres Lot
    $3,697,600 Zestimate®
    $383/sqft
    $4,400 Estimated rent

    Home value

    $3,697,600

    $3.33M - $4.10M

    $4,400/mo

    Zestimate® history
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    What's special

    Waterfront gazeboVegetable gardenPrivate tennis courtHeated saltwater poolViking appliancesCharming chicken coopPanoramic harbor views
    Commanding an incomparable position on Stony Brook Harbor, The Mallows stands as one of the most extraordinary and architecturally significant waterfront estates on Long Island’s North Shore. With over 300 feet of private shoreline and unobstructed panoramic west-facing views, this historic masterpiece captures awe-inspiring sunsets that stretch across the Long Island Sound to the Connecticut horizon. The setting is one of pure serenity and prestige—where every room frames the water and every evening ends in color. Originally commissioned by the Astor family and designed by renowned architect Charles Platt, the estate spans over four acres of manicured grounds blending Gilded Age grandeur with refined modern luxury. Outdoor living is elevated with a heated saltwater pool, spa, private tennis court, waterfront gazebo, vegetable gardens, and a charming chicken coop. Inside, 11 bedrooms, 5.5 baths, and 14 fireplaces showcase timeless craftsmanship and architectural excellence, highlighted by a glass conservatory off the primary suite and a four-season sunroom offering sweeping harbor vistas. The chef’s kitchen features Viking and Sub-Zero appliances and opens seamlessly to an elegant formal dining room ideal for entertaining. Additional luxuries include a three-bedroom guest cottage, three-level elevator, and wine cellar. This offering represents a rare and timely opportunity to own one of the North Shore’s most coveted legacy estates—a property of unmatched beauty, provenance, and waterfront presence. Perfectly located near Stony Brook Yacht Club, Avalon Nature Preserve, and Stony Brook Village, The Mallows is not just a home—it is an enduring statement of elegance, privacy, and coastal grandeur.

    Zillow last checked:

    Listing updated:

    Listed by:

    Michael V. Foley 631-664-8200,

    Frontline Realty Group LLC 631-938-1481

    Bought with:

    Alexander Iaquinta, 10371201898

    Iaquinta Premier Properties

    Source: OneKey® MLS as distributed by MLS GRID,MLS#: 835698MLS Logo

    Facts & features

    Interior

    Bedrooms & bathrooms
    • Bedrooms: 11
    • Bathrooms: 7
    • Full bathrooms: 5
    • 1/2 bathrooms: 2
    Other
    • Description: Full Basement, 1/2 Bath, Utilities, Additional washer/dryer hookup, Storage, Elevator
    • Level: Basement
    Other
    • Description: Eat in Kitchen, Formal Dining Room, Family Room, Large Foyer, Library, Powder Room, Elevator, Glass All Season Room
    • Level: First
    Other
    • Description: Primary Ensuite, 4 Additional Bedrooms, 2 Additional Full Bathrooms, Washer/Dryer, Elevator, Sun Room
    • Level: Second
    Other
    • Description: 3 Bedrooms, Bonus Room, Living Room, Eat in Kitchen, Full Bathoom
    Other
    • Description: Attached Guest Cottage: Eat in Kitchen, Living Room, 3 Bedrooms, Full Bathroom, Private Entrance, Entrance to main house
    Other
    • Description: Heated Salt Water Pool, Gazebo, Private Beach, Hot Tub, Tennis Court, Limestone Patio, Oversized Cobblestone Driveway, Attached Garage, Vegetable Garden, Chicken Coup, Playground
    Heating
    • Oil, Forced Air
    Cooling
    • Central Air
    Appliances
    • Included: Dishwasher, Dryer, Microwave, Oven, Refrigerator, Washer, Oil Water Heater
    Features
    • Central Vacuum, Primary Bathroom
    • Flooring: Hardwood
    • Basement: Full,Partially Finished,Walk-Out Access
    • Attic: Full
    • Number of fireplaces: 14
    Interior area
    • Total structure area: 9,411
    • Total interior livable area: 9,411 sqft

    Property

    Parking
    • Total spaces: 3
    • Parking features: Attached, Driveway, Garage, Off Street, Private
    • Garage spaces: 3
    • Has uncovered spaces: Yes
    Features
    • Patio & porch: Deck, Patio, Porch
    • Has private pool: Yes
    • Pool features: In Ground
    • Has view: Yes
    • View description: Water
    • Has water view: Yes
    • Water view: Water
    • Waterfront features: Beach Access, Beach Front, Waterfront, Water Access
    Lot
    • Size: 4.1 Acres
    • Features: Level, Historic District, Sprinklers In Front, Sprinklers In Rear
    Details
    • Parcel number: 0801001000100012000
    • Special conditions: None

    Construction

    Type & style
    • Home type: SingleFamily
    • Architectural style: Estate
    • Property subtype: Single Family Residence, Residential
    Materials
    • Stucco
    Condition
    • Year built: 1906

    Utilities & green energy

    • Sewer: Septic Tank
    • Water: Public
    • Utilities for property: Cable Available

    Community & HOA

    Community
    • Security: Security System
    HOA
    • Has HOA: No
    Location
    • Region: Stony Brook

    Financial & listing details

    • Price per square foot: $383/sqft
    • Tax assessed value: $4,121,875
    • Annual tax amount: $81,692
    • Date on market: 3/14/2025
    • Cumulative days on market: 413 days
    • Listing agreement: Exclusive Right To Sell

    Price history

    DateEventPrice
    2/19/2026Sold$3,600,000$383/sqft
    Source: Public Record Report a problem
    12/10/2025Sold$3,600,000-4%$383/sqft
    Source: OneKey® MLS as distributed by MLS GRID #835698 Report a problem
    10/24/2025Pending sale$3,750,000$398/sqft
    Source: OneKey® MLS as distributed by MLS GRID #835698 Report a problem
    10/9/2025Price change$3,750,000-6.3%$398/sqft
    Source: OneKey® MLS as distributed by MLS GRID #835698 Report a problem
    7/2/2025Price change$4,000,000-7%$425/sqft
    Source: OneKey® MLS as distributed by MLS GRID #835698 Report a problem
    6/10/2025Price change$4,300,000-14%$457/sqft
    Source: OneKey® MLS as distributed by MLS GRID #835698 Report a problem
    3/14/2025Price change$4,999,999-9.1%$531/sqft
    Source: OneKey® MLS as distributed by MLS GRID #835698 Report a problem
    2/5/2025Price change$5,499,000-8.3%$584/sqft
    Source: OneKey® MLS as distributed by MLS GRID #L3577211 Report a problem
    9/7/2024Price change$5,999,999-6%$638/sqft
    Source: OneKey® MLS as distributed by MLS GRID #3577211 Report a problem
    6/19/2024Listed for sale$6,380,000-7.4%$678/sqft
    Source: OneKey® MLS as distributed by MLS GRID #3560261 Report a problem
    10/16/2023Listing removed--
    Source: OneKey® MLS as distributed by MLS GRID #H6242881 Report a problem
    4/15/2023Listed for sale$6,888,888-1.6%$732/sqft
    Source: OneKey® MLS as distributed by MLS GRID #H6242881 Report a problem
    1/25/2023Listing removed--
    Source: OneKey® MLS as distributed by MLS GRID #H6194259 Report a problem
    10/11/2022Listed for sale$6,999,999-11.3%$744/sqft
    Source: OneKey® MLS as distributed by MLS GRID #H6194259 Report a problem
    9/30/2022Listing removed--
    Source: OneKey® MLS as distributed by MLS GRID #H6194259 Report a problem
    7/8/2022Listed for sale$7,888,000+192.1%$838/sqft
    Source: OneKey® MLS as distributed by MLS GRID #H6194259 Report a problem
    10/17/2000Sold$2,700,000$287/sqft
    Source: Public Record Report a problem

    Public tax history

    YearProperty taxesTax assessment
    2025-- $32,975
    2024-- $32,975
    2023-- $32,975
    2022-- $32,975
    2021-- $32,975
    2020-- $32,975
    2019-- $32,975
    2018-- $32,975
    2017$74,429 $32,975
    2016-- $32,975
    2015-- $32,975
    2014-- $32,975
    2013-- $32,975
    2012-- $32,975
    2011-- $32,975
    2010-- $32,975
    2009-- $32,975
    2008-- $32,975
    2007$45,664 +12.3%$32,975
    2005$40,652 +8.6%$32,975
    2004$37,445 +5.8%$32,975
    2003$35,395 +8.7%$32,975
    2002$32,568 $32,975
    2001-- $32,975
    2000$28,629 $32,975
    Find assessor info on the county website

    Neighborhood: 11790

    Nearby homes

    Nearby schools

    GreatSchools rating
    Schools provided by the listing agent
    • Elementary: Minnesauke Elementary School
    • Middle: Paul J Gelinas Junior High School
    • High: Ward Melville 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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    Estimated market value
    $3,697,600
    Get a cash offer in 3 minutes
    Find out how much your home could sell for in as little as 3 minutes with a no-obligation cash offer.
    Estimated market value
    $3,697,600

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