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MLS ID KEY1049317Last updated Oct 16, 2026

Single Family

26 Tennis Court Road

Active · Oyster Bay · Nassau County, NY 11771

Bedrooms
6 Beds
Bathrooms
7 Baths
Year built
1993
Est. monthly taxes
$6,037.67
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About this home

Thalassa Bay is an extraordinary 9,900sf beachfront estate set upon 200ft of direct shoreline on the tranquil waters of Oyster Bay Harbor. This magnificent waterfront sanctuary offers an exceptional luxury lifestyle defined by water, light, privacy, and endless horizons, with an indoor swimming pool and spa, private one-bedroom guest apartment with separate entrance, 4-car garage, tennis court, six fireplaces, billiards room with wet bar, recreation room, expansive gardens, gazebo, and direct saltwater access for swimming, kayaking, boating, jet skiing, and water skiing. Invite family and guests to collect oysters and mussels along the shoreline before gathering for an unforgettable evening dinner, surrounded by walls of glass overlooking the pristine harbor. Thalassa Bay is a private retreat where sophisticated architecture and nature exist in extraordinary harmony. Expansive gardens, gracefully flow toward the water, while each sunrise transforms the harbor into a shimmering palette of gold and rose. A formal driveway framed by stone and granite accents, grand tiered fountain, mature landscaping, and seasonal flowers creates a memorable arrival at the elegant double-door entrance. Upon entering, dramatic water views and soaring spaces immediately establish the home’s remarkable character. Walls of glass, marble floors with brass inlay, designer baths, gourmet eat-in-kitchen, custom railings, architectural details, and beautifully crafted built-ins create an atmosphere of refined elegance. The spectacular Gala Hall features soaring ceilings, panoramic water views, an impressive hand-carved marble fireplace, and an extraordinary backlit and underlit Onyx bar. A Juliet balcony overlooks the fountains and gardens, creating an idyllic setting for morning coffee and quiet reflection.A floating marble staircase and dramatic second-story living room further enhance the architectural presence, while the ever-changing harbor remains a central element of the interior experience. A distinctive European influence flows throughout the residence, with marble, glass, stone, light, and water creating a sophisticated continuity from room to room. The second floor encompasses the sumptuous primary suite, complete with its own fireplace, along with two additional bedroom suites, each featuring a private balcony and beautifully appointed designer bath, creating an intimate retreat overlooking the surrounding gardens and shimmering waters. The lower level offers a private resort experience centered around an indoor swimming pool and spa, dedicated changing room and bath, fireplace, billiards room with wet bar, and recreation room. The private one-bedroom guest apartment provides a comfortable and discreet retreat for family and friends. The surrounding waterfront community of Swan Cove offers a full boat launch, floating dock, and oversized parking area, providing exceptional convenience for boating and entertaining. Additional parking accommodates large gatherings, a golf cart may offer a charming way to transport guests between the waterfront and main residence. Thalassa Bay is a rare North Shore beachfront estate where architecture, landscape, and water converge to create a truly distinctive way of life. Here, the horizon is not simply a view; it becomes part of everyday living. View 3D tour and Floor Plan.

Listing snapshot

Days on site
26 days
Listed on MLS
Oct 2, 2026
Full baths
6
Half baths
1
Annual property tax (MLS)
$72,452
Tax year
2026
Area source (MLS)
Plans
Listing brokerage
Douglas Elliman Real Estate
MLS ID
KEY1049317
Last updated
Oct 16, 2026

General features

Property type
Single Family
Property subtype
Single Family Residence
Year built
1993
Garage
Yes
Garage spaces
4
Parking
Attached, Driveway, Garage, Private
Water source
Public, Shared Well
Sewer
Septic Tank
Utilities
Cable Available, Electricity Available, Water Available

Interior features

Basement
Full, Walk-Out Access
Heating
Forced Air, Propane
Cooling
Central Air
Interior
First Floor Bedroom, First Floor Full Bath, Built-in Features, Cathedral Ceiling(s), Central Vacuum, Chandelier, Chefs Kitchen, Crown Molding, Double Vanity, Eat-in Kitchen, Entrance Foyer, Formal Dining, Granite Counters, High Ceilings, Kitchen Island, Open Floorplan, Pantry, Primary Bathroom, Storage, Walk-In Closet(s), Wet Bar
Appliances
Dishwasher, Dryer, Oven, Refrigerator, Washer
Flooring
Hardwood, Tile
Fireplace
Yes
Fireplaces
4

Exterior features

Architectural style
Contemporary, Estate
Construction materials
Frame
Exterior
Balcony, Tennis Court(s)
Private pool
Yes

Schools (MLS)

Elementary school
Theodore Roosevelt School
Elementary school district
Oyster Bay-East Norwich
Middle school
Oyster Bay High School
Middle school district
Oyster Bay-East Norwich
High school
Oyster Bay High School
High school district
Oyster Bay-East Norwich

School information is provided by the MLS. Confirm attendance eligibility with the school district.

Recent activity

  1. Listing updated from MLS
  2. First seen on this site
  3. MLS status changed

Location

Oyster Bay · Nassau County, NY 11771Show interactive map
26 Tennis Court Road

Oyster Bay · Nassau County, NY 11771

Google Maps directions

Estimate monthly payment

Loan detailsFixed-rate, fully amortizing loan. Edit the assumptions below; no market rate is supplied.
Property expenses (USD)
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Estimated monthly principal & interest—

Monthly property taxNot provided

Monthly association / maintenance feesNot provided

Estimated monthly total of entered costs—

Excludes insurance, mortgage insurance, special assessments and lender fees. MLS taxes may reflect abatements or exemptions and can change.

Listing data is supplied by the MLS and may change without notice.