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$1,999,000
Monthly Est:$9,950
5 Beds
- 4 Baths
3 full baths + 1 half bath
4,600sqft
89 Harbor Rd, Smithtown, NY 11780
$1,999,000
$9,950/moEst:
Get Pre-Approved
Single Family Residence
Built in 1974
$-- HOA
2.75 acres lot
$435/sq.ft
Description
A Rare Waterfront Sanctuary in the Village of Head of the Harbor. For the first time since it was built more than half a century ago, this remarkable waterfront property is being offered for sale. Privately set on 2.75 acres overlooking Stony Brook Harbor, 89 Harbor Road has remained under its original ownership since its creation and is defined by privacy, natural beauty and an extraordinary connection to the surrounding landscape. With 200 feet of waterfront, sweeping views extend across the pristine harbor toward Nissequogue, and Long Island Sound beyond, while private steps lead directly to the beach and water below, where a substantial stone riprap revetment protects the shoreline.
A long and winding drive passes through a wooded landscape, leading to a broad opening with a light-filled residence framed by majestic oaks and a backdrop of water and sky. Upon arrival, there is an immediate sense of having left the hustle and bustle of the outside world behind—a peaceful sanctuary where the landscape, changing tides and natural beauty of the harbor become part of everyday life.
Designed by architect Geysa Sarkany, the approximately 4,600-square-foot residence was conceived around its remarkable setting. The home was designed to look outward, with walls of glass creating a seamless connection between the interiors and the water and landscape beyond. Beneath this openness is a home of substantial construction, engineered and built with solidity and permanence. From the principal living spaces, kitchen and covered deck, the architecture continually draws the eye outward, framing individual views of the sky, shoreline and ever-changing harbor. Thoughtfully placed windows and glass, cypress siding and natural materials further connect the architecture to its surroundings, while 5 bedrooms and 3.5 baths across three levels provide substantial living space.
Here, no two days on the harbor are quite the same. The tides rise and recede, revealing winding channels and broad tidal flats. Herons wander the shoreline while ospreys and eagles soar overhead, and sailboats, kayaks and paddleboarders quietly pass below. Summer brings long evenings on the covered deck and breathtaking sunsets over the water, as the sky and harbor take on an ever-changing palette of color and texture. In autumn, the marsh grasses turn from green to gold, while the shifting light and changing winds transform the landscape.
The connection to the waterfront extends beyond the views, with direct beach and harbor access for kayaking, paddleboarding and sailing—making the water an integral part of life here.
Lovingly maintained and thoughtfully updated over the years, great care has been taken to retain the home’s architectural character and its remarkable connection to the surrounding landscape. It presents a rare opportunity for its next owner to continue its story—whether embracing the home as it is or thoughtfully making it their own.
While the setting feels a world away from everyday life, it is within the Smithtown School District and only minutes from Stony Brook Village, Stony Brook University and Stony Brook University Hospital, along with local restaurants, shopping, Avalon Nature Preserve and Harmony Vineyards—offering an exceptional balance of privacy, natural beauty and convenience.
The combination of acreage, privacy, substantial waterfront, elevation, direct beach access and expansive views across a pristine harbor presents a remarkable setting—an opportunity to live surrounded by natural beauty, within an ecosystem and landscape that change with every tide and season. A property offering this combination of features rarely becomes available.
- Houzeo last checked: 12 hours ago
- Listing updated: September 30, 2026 at 9:29 pm
- Listing Provided by: Bonnie Glenn (631) 921-1494 | Daniel Gale Sothebys Intl Rlty (631) 584-6600
- Source: OneKey MLS-NY | MLS#: 1054624

Property Details
Status
Active
Type
Single Family Residence
No. of Stories
-
County
City
Neighborhood
--
Year Built
1974
HOA Fees
-
Finished Area
4,600 sqft
Lot Size
2.75 acres lot
Basement Area
- sqft
MLS Name
OneKey MLS
MLS Number
1054624
MLS Status
Active
Days on Market
3

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Location
Facts & Features
Rooms
Bedrooms & bathrooms
Bedrooms: 5
Bathrooms: 4
Basement
Level: Lower
Living Room
Level: First
Kitchen
Level: First
Office
Level: First
Family Room
Level: First
Dining Room
Level: First
Bathroom 1
Level: First
Bathroom 2
Level: First
Laundry
Level: First
Primary Bedroom
Level: Second
Bedroom 4
Level: Second
Bedroom 5
Level: Second
Bathroom 4
Level: Second
Interior
Flooring
Hardwood, Tile
Appliances
Dishwasher, Dryer, Electric Oven, Electric Range, Exhaust Fan, Microwave, Refrigerator, Washer, Tankless Water Heater
Sewer
Cesspool
Interior Features
First Floor Full Bath, Beamed Ceilings, Breakfast Bar, Built In Features, Cathedral Ceiling(s), Central Vacuum, Eat In Kitchen, Entrance Foyer, Formal Dining, High Ceilings, High Speed Internet, Kitchen Island, Natural Woodwork, Open Kitchen, Recessed Lighting, Tile Counters, Tray Ceiling(s), Walk In Closet(s), Washer/dryer Hookup
Heating
Baseboard, Forced Air, Oil
Window Features
Bay Window(s), Casement, Double Pane Windows, Floor To Ceiling Windows, Oversized Windows, Screens, Skylight(s), Wall Of Windows, Wood Frames
Cooling
Central Air
Construction
Year Built
Year Built: 1974
Home type
Single Family Residence
Architectural Style
Contemporary
Property Condition
Actual
Foundation Details
Concrete Perimeter
Construction Materials
Batts Insulation, Brick, Cedar, Frame
Utilities & Energy
Parking Features
Driveway
Laundry Features
Electric Dryer Hookup, In Hall, Washer Hookup
Basement
Full, Partially Finished, Storage Space, Walk Out Access
Water Source
Well
Utilities
Cable Connected, Electricity Connected, Phone Connected, Propane, Trash Collection Public
Fireplace Features
Family Room, Living Room, Wood Burning
Other Features
Disclosures
Lead Paint
Lot Features
Back Yard, Front Yard, Part Wooded, Private, Secluded, Stone/brick Wall, Views, Waterfront, Wooded
Patio And Porch Features
Deck
Price History
| Date | Event | Price |
|---|---|---|
09/30/2026 Source: | Listed for Sale | $1,999,000 $435/sqft |
09/28/2026 Source: | Coming Soon | $1,999,000 $435/sqft |
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Based on information from OneKey MLS, through Oct 01, 2026, 02:47PM. IDX information is provided exclusively for personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but not guaranteed. © 2026 OneKey® MLS. All rights reserved.
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