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19 Mallard Drive

Lloyd Harbor, NY, 11743

$3,495,000
6Bedrooms
9Bathrooms
10,500Interior sq ft
2.79Acres
1988Year built

AN INTRODUCTION

A closer look.

Swan's Cove — Where The Bay becomes your BackYard. Some homes have a view. Swan's Cove has a horizon. Set on Lloyd Neck's storied Gold Coast, this 10,500-square-foot waterfront estate was designed so that every room — across three sweeping levels — turns toward the water, capturing Long Island Sound and Oyster Bay in a panorama that shifts from silver morning mist to gold-lit sails to a full western sunset, night after night. Tucked at the end of a private road in the Cold Spring Harbor School District, Swan's Cove offers the rare kind of privacy that lets a family exhale, while placing them minutes from one of Long Island's most sought-after school systems. Inside, the architecture matches the setting's drama: soaring ceilings, sun-washed formal living spaces, and a chef's kitchen outfitted with Sub-Zero, Wolf, and Miele for anyone who takes cooking seriously. A commanding primary suite, four additional en-suite bedrooms, and a fully separated guest wing give every member of the household, and every guest, their own retreat. And then there's the part of the house built purely for living well: an indoor spa complex with pool, sauna, and gym, a private tearoom, and a home theater built for a proper premiere night. Step outside to more than 2,200 square feet of multi-level decking, the best seat on the Sound for sunset, sailboats, and salt air. Beyond the property line, life at Swan's Cove comes with membership in a rare kind of community: Lloyd Harbor's private beach and park, with tennis, summer camp, a boat ramp, and mooring rights all within reach. This isn't just a listing. It's the chance to own one of the Gold Coast's defining waterfront addresses, a legacy property, ready for its next chapter.

Property overview

Property type
Single Family Residence
Architecture
Colonial
Year built
1988
Lot size (sq ft)
121,532
Status
Active
Listed
2026-04-16
MLS number
KEY986062

Interior & comfort

Interior features
First Floor Bedroom, First Floor Full Bath, Beamed Ceilings, Built-in Features, Cathedral Ceiling(s), Chefs Kitchen, Elevator, Entrance Foyer, Formal Dining, High Ceilings, Kitchen Island, Pantry, Primary Bathroom, Master Downstairs, Recessed Lighting, Storage
Appliances
Cooktop, Dishwasher, Oven, Range, Refrigerator, Stainless Steel Appliance(s)
Heating
Forced Air, Oil
Cooling
Central Air
Basement
Finished, Full
Fireplaces
3

Outdoors & amenities

Parking
Garage
Garage spaces
3
Pool
Indoor
Waterfront
Lake Front

Schools & location

Postal town
Lloyd Harbor
County
Suffolk County
School district
Cold Spring Harbor
Elementary school
Lloyd Harbor School
Middle school
Cold Spring Harbor High School
High school
Cold Spring Harbor High School

Taxes & utilities

Annual property taxes
$59,947
Tax year
2025
Association
Yes
Association fee
$1,200
Fee frequency
Annually
Water
Public
Sewer
Cesspool

Listing courtesy of EXP Realty · 888-276-0630
MLS #KEY986062 · Active

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