Suffolk County, NY Duplexes for sale

Updated: Mar 2

Bayfront Multifamily Property

654A DUNE RD, Westhampton Dunes, NY 11978

$3,699,000

2,174 sqft 0.56 AC lot

Bayfront multifamily with approx. 175 ft of bulkheading and sweeping open‑bay views
Main cottage: 3 bedrooms, 2 bathrooms, eat‑in kitchen, and a great room oriented to water views
Separate guest cottage: 2 bedrooms, 1 bathroom, fully equipped kitchen, and split systems for A/C and heat
Deck and outdoor shower for bay‑side outdoor living
Built in 1956; hardwood flooring; fireplace; air conditioning and heating including electric/forced air/heat pump

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Updated: May 29

Income-Producing Duplex in East Islip

66-68 Hawthorne, East Islip, NY 11730

$895,000

0.52 AC lot

Duplex built in 1974 with colonial style, brick construction, and shingle siding
Each unit has 3 bedrooms, a spacious living room, formal dining, and an eat‑in kitchen
Master bedroom and first‑floor full bath on the main level features, plus open floorplan
Off‑street parking with private garages for each unit and an additional oversized garage
Shared laundry room with designated washer/dryer hookups for each unit; oil heat

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Two-Family Home with Detached Garage

733 14th Street, West Babylon, NY 11704

$799,999

0.25 AC lot

Legal two-family with separate utilities, spacious units, and a detached two-car garage on a fenced lot.

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Bay Shore Mixed-Use Opportunity

Bayshore, NY 11706

$1,400,000

2,600 sqft

Three structures on one lot in Bay Shore's Business District.

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Renovated Two-Family Colonial Home

10 Springmeadow Drive, Kings Park, NY 11754

$1,475,000

1.00 AC lot

Extensively renovated 2025 two-family Colonial on a one-acre lot with detached two-car garage and private fenced patio.

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Legal Two-Family Duplex

527 Milligan Lane, West Islip, NY 11795

$785,000

0.23 AC lot

Well-maintained two-unit property with updated interiors, two floors of living space, and a detached two-car garage.

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Legal Two-Family Corner Home

57 JERMAIN AVE, Sag Harbor, NY 11963

$1,949,000

1,577 sqft 0.21 AC lot

Circa-1938 two-family home with two kitchens, three full baths, off-street parking, and a den on a corner lot.

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Restaurant with Apartments Above

26 Laurel Road, East Northport, NY 11731

$1,200,000

6,418 sqft

Long-running restaurant with a bar area and two income-producing apartments above, with convenient parking behind the building.

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Legal Two-Family Residence

15-17 Park Woods Lane, Kings Park, NY 11754

$1,625,000

1.00 AC lot

Two separate homes on one acre, including a Colonial main house and Ranch residence, each with multiple bedrooms and baths.

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Legal Two-Unit Duplex on Corner Lot

145 Calebs Path, Brentwood, NY 11717

$750,000

0.40 AC lot

Legal two-unit duplex on a corner lot with outdoor space and private parking in Brentwood, NY.

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Four Acre Commercial Property

3120 Route 112, Medford, NY 11763

$6,500,000

19,500 sqft 4.00 AC lot

Three adjacent properties totaling four acres for sale.

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Two Homes, Southampton Opportunity

33 Locust Avenue, Southampton, NY 11968

$1,199,999

0.46 AC lot

Two detached homes on a single lot in Southampton.

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Two-Family Corner Lot Home

21 Locust Avenue, Amityville, NY 11701

$829,000

0.36 AC lot

Legal two-family home with detached one-car garage and finished basements, featuring separate utilities on an oversized corner lot.

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Waterfront Two-Family Home

742 S 9th St, Lindenhurst, NY 11757

$499,990

0.05 AC lot

Affordable waterfront two-family home with canal and bay access.

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Two-Family Income Property

22 Marilyn Court, West Babylon, NY 11704

$749,999

0.19 AC lot

Two separate units with private driveway parking and separate utilities, offering flexible residential income or multi-generational living.

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Renovated Duplex with Full Basement

458 N Magee Street, Southampton, NY 11968

$1,500,000

0.18 AC lot

Renovated 6-bedroom, 2-bath duplex on a corner lot with two kitchens, two living rooms, and an unfinished basement.

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Centereach Duplex with Subdivision Potential

33 N Washington Ave N, Centereach, NY 11720

$549,000

1.00 AC lot

Two-unit property in Centereach with subdivision potential.

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Southold Two-Family Home with Barn

1220 Youngs Avenue, Southold, NY 11971

$1,295,000

0.46 AC lot

Legal two-family home with a repurposed barn and planting field.

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Updated Two-Family Home

918 10th St, West Babylon, NY 11704

$849,990

0.18 AC lot

Two-family home with updated features and a spacious yard.

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Legal Two-Family Residence

47 Bushwick Avenue, Brentwood, NY 11717

$1,388,000

0.68 AC lot

Legal 2-family property with updated kitchens and baths, multiple well-maintained units, and ample parking on 0.68 acres.

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Warehouse Property with Truck Parking

3120 Route 112, Medford, NY 11763

$6,500,000

1.65 AC lot

Warehouse plus additional adjacent retail and residential units, with truck parking located at the rear.

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Colonial Duplex with Parking Lot

250 Main Road, Riverhead, NY 11901

$1,199,000

1.24 AC lot

Two-unit Colonial on 1.24 acres with eight bedrooms, four baths, and off-street parking.

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Greenport Legal Two-Family Home

407 Wiggins Street, Greenport, NY 11944

$1,297,000

0.12 AC lot

Two-family home in Greenport Village near restaurants, shopping, and transportation.

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Greenport Legal Two-Family Property

401 Wiggins Street, Greenport, NY 11944

$1,297,000

0.12 AC lot

Two-family property in Greenport, NY, near local amenities.

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Suffolk County, NY Duplexes Market Trends and Statistics

Explore 38 duplexes for sale in Suffolk County, NY, showcased through 38 active listings on our real estate platform. These investment opportunities span a total of 33,969 square feet of properties for sale, with an estimated market value of $16,098,000.

Sale prices for duplexes in Suffolk County, NY start at $1,099,000, averaging $2,683,000, and reaching up to $6,500,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

Featured Suffolk County Real Estate Agencies

Realmo connects you with licensed Suffolk County CRE brokers providing property specifications, local market pricing, and commercial transaction underwriting support.

Realty Connect USA

35 Arkay Dr Hauppauge, NY 11788

Phone: 16318815160

www.realtyconnectusa.com

Eric G. Ramsay Jr. Associate LLC

236 West Main St Bayshore, NY 11706

Phone: 16316651500

www.ramsayrealtors.com

I.M. Best, Inc., d/b/a Re/Max Best

575 Sunrise Highway Babylon, NY 11704

Phone: 16313219203