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$19,000,000

For Sale - Active
31 Fort Hill Dr, Lloyd Harbor, NY 11743
13 Beds
14 Baths
28,000 Square Feet
0.00 Acres Lot
Built in 1910
For Sale - Active
1 Units
Checked: 11 hours ago
Updated: Aug 06, 2025 at 01:23AM

Investment Summary


Monthly Cash Flow
-$104,410
Cap Rate
-0.5%
Cash-on-Cash Return
-28.7%
Debt Coverage Ratio
-0.09
Internal Rate of Return (5 years)
-23.6%

Property Description


0.00 Acres Lot
Built in 1910
For Sale - Active
1 Units

Welcome to 31 Fort Hill Drive, a landmark estate perched atop 10 private acres in the prestigious enclave of Lloyd Harbor. Set across two parcels with 1,800 feet of private beachfront and a deep-water dock, this extraordinary compound offers uninterrupted, panoramic views of the Long Island Sound—widely regarded as among the finest vantage points on the North Shore. Steeped in natural beauty and rich American history, the estate sits on Fort Hill, a site of Revolutionary War significance where signal beacons once watched over the Sound. Today, the same elevated terrain offers a rare sense of seclusion, grandeur, and sweeping coastal vistas that change with every season and every tide. This custom brick residence is a masterwork of craftsmanship and scale, featuring 13 bedrooms, 10 full bathrooms, and four half baths. Elegant interior spaces include a sunlit solarium, a stately library, and an expansive, exquisitely detailed ballroom designed for unforgettable gatherings. Seven fireplaces, intricate millwork, and curated architectural details throughout add a sense of timeless refinement. A fully renovated gourmet kitchen anchors the home’s living spaces, offering high-end appliances, classic finishes, and effortless flow into formal and informal dining areas. Whether you’re hosting intimate family dinners or large-scale entertaining, the home rises to every occasion. Additional amenities include staff quarters, a 16-car garage with guest apartment suites above, a state of the art geothermal system, and flexible bonus rooms ideal for a private theater, wellness space, or art studio. Outdoors, a 3-acre curated garden with a greenhouse, invites peaceful strolls and moments of serenity amidst manicured plantings. From sunrise over the water to evenings under the stars, this is a home where every day is defined by natural splendor, privacy, and possibility. Just moments from Huntington Village and the train to NYC and located within the award-winning Cold Spring Harbor School District, 31 Fort Hill Drive is more than a home—it’s a legacy estate where history, beauty, and lifestyle converge.

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Location


Property Details


Parking

  • Description: Detached, Private
  • Garage Spaces: 16
  • Spaces Total: 0

Bedroom Information

  • # of Bedrooms: 13

Bathroom Information

  • # of Baths (Full): 10
  • # of Baths (Partial): 4
  • # of Baths (Total): 14.0

Interior Features

  • # of Rooms: 30
  • Basement: Yes
  • Basement Description: Unfinished
  • Fireplace: Yes

Land Information

  • Land Use: Residential
  • Land Use Subtype: Single Family Residential

Lot Information

  • Parcel ID: 0403006.0002.00032.002
  • Lot Size: 0 sqft

Property Information

  • Property Type: Single Family Residence
  • Style: Estate
  • Year Built: 1910

Tax Information

  • Annual Tax: $164,620

Utilities

  • Water & Sewer: Public
  • Heating: Geothermal, Oil, Steam
  • Cooling: Central Air

Location

  • County: Suffolk

Listing Details


Listed by:
Ephraim J. Simon
Serhant LLC
(631) 408-2137

Source:
OneKey MLS
MLS#: 846697
OneKey MLS

Investment Summary


Monthly Cash Flow
-$104,410
Cap Rate
-0.5%
Cash-on-Cash Return
-28.7%
Debt Coverage Ratio
-0.09
Internal Rate of Return (5 years)
-23.6%

Purchase Details

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Purchase price:
$19,000,000
Amount financed:
-$15,200,000
Down payment:
$3,800,000
Closing costs:
$570,000
Rehab costs:
$0
Initial cash invested:
$4,370,000
Square feet:
28,000
Cost per square foot:
$679
Monthly rent per square foot:
$0.28

Financing Details

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Loan amount:
$15,200,000
Loan to value ratio:
80.0%
Loan type:
Amortizing
Term:
30 years
Interest rate:
6.500%
Principal & interest:
$96,074
Property tax:
$13,718
Insurance:
$546
Private mortgage insurance (PMI):
$0
Monthly payment:
$110,338

Operating Income

Find a Property Manager

% Rent Monthly Yearly
Gross rent:
$7,800 $93,600
Vacancy loss: (6%)
6% -$468 -$5,616
Operating income:
$7,332 $87,984

Operating Expenses


% Rent Monthly Yearly
Property taxes: (176%)
176%-$13,718-$164,621
Insurance: (7%)
7%-$546-$6,552
Property management: (8%)
8%-$624-$7,488
Repairs & maintenance: (5%)
5%-$390-$4,680
Capital expenditures: (5%)
5%-$390-$4,680
HOA fees: (n/a)
n/an/an/a
Total operating expenses: (201%)
201%-$15,668-$188,021

Cash Flow


Monthly Yearly
Net operating income:
-$8,336 -$100,032
Mortgage payments:
-$96,074 -$1,152,888
Cash flow:
$104,410 $1,252,920