Middlesex County, NJ Duplexes for Sale

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Updated: Aug 5

Renovated Two-Family Duplex

21 Market St, Edison, NJ 08817

$825,000

3,250 sqft

3,250 sq. ft. duplex with two separate living quarters
Fully rebuilt from the studs with new plumbing and electrical
Two kitchens with quartz countertops, marble backsplashes, and 42‑inch custom cabinetry
Three new full bathrooms and new flooring
Private entrance for the second apartment

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21 Market St, Edison Twp., NJ 08817-4441

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Est. Cap Rate

7.2%
Above avg (5.9%)
Est. NOI

$60K
Annual
Price @ 7% Cap

$850K
Above asking
Property Type

Single Family Residence
Built 1949

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Updated: Aug 13

Waterfront Mixed-Use Property

275 Laurence Parkway, South Amboy, NJ 08879

$575,000

1,120 sqft 0.05 AC lot

Two‑family layout with separate entrances and utilities
1,120 square feet on a 0.05‑acre lot
Unit mix includes 2 bedrooms and 1 bath plus 3 bedrooms and 1 bath
Basement level offers possible business, office, studio, or commercial use subject to approvals
Ocean Front waterfront features with water views

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Duplex with Finished Walk-Up Attic

40 Throop Avenue, New Brunswick, NJ 08901

$650,000

2,594 sqft 0.05 AC lot

Two residential units offer hardwood flooring, full appliance packages, and access to shared basement storage.

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Two-Family Home with Attached Garage

32 Suydam Street, New Brunswick, NJ 08901

$775,000

2,310 sqft 0.11 AC lot

Two separately metered apartments near Rutgers University include generous basement and attic storage areas.

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Renovated Duplex with Detached Garage

105 Louis St, New Brunswick, NJ 08901

$850,000

2,312 sqft

Two-unit property with updated interiors, separate utilities, a full basement, and substantial off-street parking.

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Duplex with Oversized Garage

393 Prospect Street, South Amboy, NJ 08879

$625,000

2,091 sqft 0.18 AC lot

Legal two-family property with separate apartments, outdoor areas, driveway parking, and access to regional rail and ferry service.

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Side-by-Side Duplex with Basements

11 Mayfield Place, Metuchen, NJ 08840

$1,099,000

1,680 sqft 0.04 AC lot

Two-bedroom units offer separate driveways, fenced outdoor space, and private basement storage with laundry.

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Renovated Duplex with Private Yards

28 VICTORIA Avenue, Spotswood, NJ 08884

$819,000

2,152 sqft 0.23 AC lot

Two three-bedroom units offer separate basements, laundry areas, individual utilities, yards, and driveways.

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Waterfront Mixed-Use Property

275 Laurence Parkway, South Amboy, NJ 08879

$575,000

1,120 sqft

Two residential units have separate entrances and utilities, with basement space suited to potential business use pending approvals.

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Renovated Duplex with Two Units

27 Alexander St, New Brunswick, NJ 08901

$549,000

1,760 sqft 0.06 AC lot

Two-unit property with separate gas and electric utilities, updated first-floor kitchen, basement storage, and public water and sewer.

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Updated Duplex with Central Air

331 Watson Avenue, Perth Amboy, NJ 08861

$525,000

1,200 sqft 0.04 AC lot

Two apartments offer separate utilities, an open porch, and a fenced yard with on-street parking.

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Side-by-Side Duplex

11 Mayfield Pl, Metuchen, NJ 08840

$1,099,000

1,680 sqft 0.04 AC lot

Two separate residences offer private outdoor areas, basements, driveways, and access to public utilities.

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Waterfront Duplex

275 Laurence Parkway, South Amboy, NJ 08879

$575,000

1,900 sqft 0.05 AC lot

Two separate residences offer distinct entrances, utilities, and flexible occupancy options in a waterfront setting.

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Mixed-Use Office and Duplex

1800 N State Route 35 Road, South Amboy, NJ 08879

$899,000

1,723 sqft

For-sale mixed-use building with separate office and large parking, positioned for strong traffic flow and highway access.

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Duplex with Central Air

331 Watson Ave, Perth Amboy, NJ 08861

$525,000

1,650 sqft 0.04 AC lot

Both updated apartments feature central AC, with tenants using separate meters and paying utilities, including water.

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Two-Unit Duplex with Garage

44 N Whittier Street N, Carteret, NJ 07008

$849,999

3,000 sqft 0.11 AC lot

Each residence offers three bedrooms, two full bathrooms, central air conditioning, and forced-air heating.

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Renovated Duplex with Oversized Garage

368 Inslee St, Perth Amboy, NJ 08861

$550,000

1,638 sqft

Two-family property with updated kitchens and bathrooms, a double lot, and established rental history.

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Two-Unit Duplex with Porches

224-224 N 4th Avenue, Highland Park, NJ 08904

$705,000

1,872 sqft 0.07 AC lot

Two residential units with kitchens, dining areas, bedrooms, porches, basement laundry facilities, and a fenced yard.

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Two-Unit Duplex with Basement

224-224 N 4th Ave, Highland Park, NJ 08904

$705,000

1,872 sqft

Each residence offers two bedrooms, private porch space, and access to shared laundry facilities.

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Colonial Duplex with Basement

44 High Street, New Brunswick, NJ 08901

$660,000

1,964 sqft 0.05 AC lot

Colonial duplex built in 1922 with public water and public sewer, shingle roof, and hot water heating.

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Updated Duplex with Fenced Yard

331 Watson Ave, Perth Amboy, NJ 08861

$525,000

1,200 sqft

Two apartments offer central air, separate meters, and an open porch.

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Mixed-Use Property with Office Space

1800 N State Route 35 Road, South Amboy, NJ 08879

$899,000

1,723 sqft

Two-family occupancy and a separate office area create a flexible mixed-use configuration with substantial on-site parking.

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Duplex with 5-Car Garage

212 Sherman Street, Perth Amboy, NJ 08861

$700,000

2,184 sqft

Two three-bedroom units offer separate living rooms, baths, and eat-in kitchens.

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Two-Unit Property with Finished Basement

640 Florida Grove Rd, Perth Amboy, NJ 08861

$699,999

2,146 sqft 0.12 AC lot

Two residential units offer matching bedroom and bathroom layouts, plus additional basement space with a private entrance.

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Middlesex County, NJ Duplexes Market Trends and Statistics

Explore 108 duplexes for sale in Middlesex County, NJ, showcased through 108 active listings on our real estate platform. These investment opportunities span a total of 130,806 square feet of properties for sale, with an estimated market value of $68,707,786.

Sale prices for duplexes in Middlesex County, NJ start at $359,000, averaging $660,651, and reaching up to $1,099,000 — offering options for a variety of budgets and business needs. Daily updated analytics ensure you stay ahead with the latest data and market trends.

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