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$3,600,000

  • Sold
  • Closed
  • Single Family
  • 11 Beds
  • 5 Full Baths
  • 2 Partial Baths
  • 3 Car Garage
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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.

Full Property Details for 15 Emmet Dr

General

  • Sold For: $3,600,000
  • Taxes: $81,692
  • Status: Closed
  • Type: Single Family
  • Source: Long_Island
  • MLS ID: 835698
  • Added to Site: 341 day(s) ago

Interior

  • Number of Rooms: 24
  • Interior Features: Central Vacuum, Primary Bathroom
  • Fireplace: Yes
  • Number of Fireplaces: 14
  • Appliances: Dishwasher, Dryer, Microwave, Oven, Refrigerator, Washer, Oil Water Heater
  • Flooring: Hardwood

Rooms

Bathrooms

  • Total Bathrooms: 7
  • Full Bathrooms: 5
  • Half Bathrooms: 2

Bedrooms

  • Total Bedrooms: 11

Additional Information

  • Pool: Yes
  • Private Pool: Yes
  • Pool Description: In-Ground
  • Security/Safety: Security System

Exterior

  • Exterior Features: Balcony
  • Porch/Patio/Deck: Deck, Patio, Porch

Parking

  • Garage: Yes
  • Garage Spaces: 3
  • Parking Features: Attached, Driveway, Garage, Off Street, Private

Location

  • County: Suffolk County
  • Cross Streets: Harbor Rd

School Information

  • High School District: Three Village
  • Elementary School: Minnesauke Elementary School
  • Middle School: Paul J Gelinas Junior High School
  • High School: Ward Melville Senior High School

Heating & Cooling

  • Central air: Yes
  • Cooling Type: Central Air
  • Heating Type: Oil, Forced Air
  • Heating Zones: 12

Utilities

  • Sewer: Septic Tank
  • Water: Public
  • Utility Description: Cable Available

Structural Information

  • Architectural Style: Estate
  • Detached/Attached: Detached
  • Construction: Stucco, Block
  • Basement: Yes
  • Basement Desc.: Full Basement, Partially Finished, Walk-Out Access
  • Sq. Ft. Source: Public Records
  • Year Built: 1906

Lot Features

  • Property View: Water
  • Lot Size (Acres): 4.1
  • Lot Size (Sq. Ft.): 178,596
  • Lot Features: Level, Historic District, Sprinklers In Front, Sprinklers In Rear

Water Features

  • Water Front: Yes
  • Water View: Yes
  • Water Front View: Beach Access, Beach Front, Waterfront, Water Access

Financial Considerations

  • Tax Amount: $81,692.89

Disclosures and Reports

  • Special Conditions: None
  • Property ID: 0801-001-00-01-00-012-000
  • Block: 1
  • Lot Number: 6

Listed by Frontline Realty Group LLC
Sold by Iaquinta Premier Properties

Listing agent

— 15 Emmet Dr —

  • Frontline Realty Group LLC

631-938-1481

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 15 Emmet Dr

School District:Three Village Central School District
NameGradesDistance
Minnesauke Elementary School
21 Highgate Dr, Setauket- East Setauket, NY 11733
K-62.4 mi
Paul J Gelinas Junior High School
25 Mud Rd, Setauket- East Setauket, NY 11733
7-92.2 mi
Ward Melville Senior High School
380 Old Town Rd, Setauket- East Setauket, NY 11733
9-124 mi
Disclaimer: School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 15 Emmet Dr

Date
Details
Price
Change
Source
12/10/2025
Sold
$3,600,000
-4%
MLS
10/09/2025
Price Reduced
$3,750,000
-6.25%
MLS
7/02/2025
Price Reduced
$4,000,000
-6.98%
MLS
6/10/2025
Price Reduced
$4,300,000
-14%
MLS
3/14/2025
Listed
$4,999,999
—
MLS
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Listed by Frontline Realty Group LLC
Sold by Iaquinta Premier Properties

15 Emmet Drive, Saint James, NY 11790 (MLS# 835698) is a Single Family property that was sold at $3,600,000 on December 10, 2025. Want to learn more about 15 Emmet Drive? Do you have questions about finding other Single Family real estate for sale in Head of the Harbor? You can browse all Head of the Harbor real estate or contact a Coldwell Banker agent to request more information.