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    Union County, NJ Office Buildings for Sale

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    11 properties
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    Two-Story Office Building
    Updated: Apr 27
    Two-Story Office Building

    1299 US Route 22 Highway E, Mountainside, NJ 07092

    $1,750,000
    5,580 sqft 0.59 AC lot
    5,580 SF two‑story office building on 0.589 acres
    Six offices, four smaller offices, and two conference areas
    Administrative area, technology room, kitchenette, and three bathrooms
    Parking surrounds the building with front and rear entrances
    Commercial zoning with public water and public sewer
    View details
    Two-Level Mixed-Use Property
    Updated: Jul 21
    Two-Level Mixed-Use Property

    441443 441-443 E Westfield Ave, Roselle Park, NJ 07204

    $999,999
    5,272 sqft
    Approximately 5,272 square feet arranged across two levels
    Prior professional office use included medical and legal practices
    Zoning allows multiple uses, including potential for up to three residential units
    On‑site parking included
    Located on E Westfield Avenue near Roselle Park, Elizabeth, and Roselle
    View details
    Prime Union Commercial Property For Sale
    Prime Union Commercial Property For Sale

    1307 Stuyvesant Ave, Union, NJ 07083

    $1,250,000
    2,863 sqft

    Iconic property in Union's thriving Downtown Transition Zone.

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    Realmo Analytics Monitor Off-market properties and contact owners who are ready to sell. Many signals applied to make quality leads for you. Get Leads
    Office Building with Basement
    Office Building with Basement

    35 Brant Ave, Clark, NJ 07066

    $925,000
    2,600 sqft

    Owner-occupied office property with additional unfinished lower-level space.

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    Office Building
    Office Building

    210 Haven Avenue, Scotch Plains, NJ 07076

    Contact for pricing
    10,000 sqft

    Commercial office building with a substantial amount of interior space.

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    Office Building
    Office Building

    47 River Rd, Summit, NJ 07901

    Contact for pricing
    2,722 sqft

    For-sale office building in Summit, New Jersey totaling 5,924 square feet.

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    Freestanding Brick and Stone Building
    Freestanding Brick and Stone Building

    1790 Front St, Scotch Plains, NJ 07076

    $625,000
    1,800 sqft

    Professional building with off-street parking; first floor delivered vacant.

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    Two-Story Office Building
    Two-Story Office Building

    80 Morris Ave, Springfield, NJ 07081

    Contact for pricing
    8,000 sqft

    Office property with separate entrances, on-site parking, and access to major highways.

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    Historic Corner Library-Style Office Building
    Historic Corner Library-Style Office Building

    266 E Broad St, Westfield, NJ 07090

    Contact for pricing

    Iconic corner building formerly a Carnegie Library, suited for office or retail with downtown proximity.

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    Freestanding Office with Truck Parking
    Freestanding Office with Truck Parking

    26 North Avenue, Garwood, NJ 07027

    Contact for pricing

    Single-story renovated office building on a deep lot, suited for service professionals needing truck parking.

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    Downtown Commercial Redevelopment Opportunity
    Downtown Commercial Redevelopment Opportunity

    20 Franklin Pl, Summit, NJ

    Contact for pricing
    12,765 sqft 0.94 AC lot

    Four buildings totaling 12,765 SF on approximately 1 acre.

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    Based on your search, we've compiled 76 Potential Opportunities for your consideration. Besides 11 Active listings in Union County, NJ, we suggest exploring several alternatives: similar 61 Off-Market properties to explore as potential leads, plus 4 Land Listings that present a potential for development.

    Potential Development Sites for Consideration

    Can't find the perfect fit? These Land listings present an alternative path: the potential to develop a property for your specific goals.

    Important: These AI-suggestions are a starting point, not a guarantee of permitted use. All zoning, permitting, and land use information must be independently verified by you with the appropriate local authorities before making any commitments.

    Elevator-Served Specialty Property
    Elevator-Served Specialty Property

    51 W Prospect Street, East Brunswick, NJ 08816

    Contact for pricing
    6,000 sqft 0.50 AC lot

    The property combines stucco construction with forced-air heat and zoned cooling.

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    Office Building with Elevator
    Office Building with Elevator

    51 W Prospect Street, East Brunswick, NJ 08816

    $3,000,000
    6,000 sqft 0.50 AC lot

    OP1-zoned office property with accessible elevator service, public utilities, and a mix of laminate and wood flooring.

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    Office Building with Elevator
    Office Building with Elevator

    51 W Prospect Street, East Brunswick, NJ 08816

    Contact for pricing
    6,000 sqft 0.50 AC lot

    Two-story commercial office property with parking, public utilities, and zoned cooling for flexible workspace configuration.

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    Commercial Land with Medical Uses
    Commercial Land with Medical Uses

    351 Doctors Way, Hillsborough, NJ 08844

    $2,500,000
    3.29 AC lot

    Commercial HS zoning supports medical offices, business services, restaurants, and designated care facilities.

    View details

    Off-Market Properties in Union County, NJ

    Consider similar Off-Market properties in Union County, NJ. You may contact the owners directly to inquire about their potential intentions to sell. To help you make a strong first impression, we can assist by reaching out to these owners with compelling proposals created using our AI tool.

    655 Pt 1300th Ave
    OFFICE BUILDING

    655 Pt 1300th Ave, Elizabeth, NJ 07201-1213

    Estimated value:
    $2,655,000
    7,020 sqft 0.56 AC lot
    View details
    613 Westminster Ave, Unit 619
    OFFICE BUILDING

    613 Westminster Ave, Elizabeth, NJ 07208-2208

    Unit 619
    Estimated value:
    $530,000
    2,917 sqft 0.53 AC lot
    View details
    264-268 Broad St, Unit 268
    OFFICE BUILDING

    264-268 Broad St, Elizabeth, NJ 07208-3701

    Unit 268
    Estimated value:
    $1,565,000
    13,066 sqft 0.17 AC lot
    View details
    504 Maple Ave, Unit R500-R
    OFFICE BUILDING

    504 Maple Ave, Elizabeth, NJ 07202-3514

    Unit R500-R
    Estimated value:
    $150,000
    660 sqft 0.55 AC lot
    View details
    519 Pennsylvania Ave, Unit 525
    OFFICE BUILDING

    519 Pennsylvania Ave, Elizabeth, NJ 07201-1183

    Unit 525
    Estimated value:
    $825,000
    5,892 sqft 0.47 AC lot
    View details
    440 Broad St
    OFFICE BUILDING

    440 Broad St, Westfield, NJ 07090-2124

    Estimated value:
    $1,800,000
    7,196 sqft 0.57 AC lot
    View details
    1507 Saint Georges Ave
    OFFICE BUILDING

    1507 Saint Georges Ave, Rahway, NJ 07065-2717

    Estimated value:
    $570,000
    1,058 sqft 0.12 AC lot
    View details
    115 Jefferson Ave
    OFFICE BUILDING

    115 Jefferson Ave, Elizabeth, NJ 07201-2417

    Estimated value:
    $225,000
    2,794 sqft 0.05 AC lot
    View details
    113 Jefferson Ave
    OFFICE BUILDING

    113 Jefferson Ave, Elizabeth, NJ 07201-2417

    Estimated value:
    $225,000
    1,762 sqft 0.05 AC lot
    View details
    468 Nn Ave, Unit 474
    OFFICE BUILDING

    468 Nn Ave, Elizabeth, NJ 07208-1738

    Unit 474
    Estimated value:
    $810,000
    3,702 sqft 0.31 AC lot
    View details
    530 Westfield Ave, Unit 532
    OFFICE BUILDING

    530 Westfield Ave, Elizabeth, NJ 07208-1623

    Unit 532
    Estimated value:
    $845,000
    4,209 sqft 0.14 AC lot
    View details
    108 Jersey St, Unit 110
    OFFICE BUILDING

    108 Jersey St, Elizabeth, NJ 07202-2013

    Unit 110
    Estimated value:
    $850,000
    3,628 sqft 0.17 AC lot
    View details
    137 Smt Ave
    OFFICE BUILDING

    137 Smt Ave, Summit, NJ 07901-2800

    Estimated value:
    $2,000,000
    6,600 sqft 0.61 AC lot
    View details

    Union County, NJ Office Buildings Market Trends and Statistics

    Explore 72 office buildings for sale in Union County, NJ, showcased through 11 active listings on our real estate platform. These investment opportunities span a total of 51,602 square feet of properties for sale, with an estimated market value of $5,549,999.

    Sale prices for commercial office buildings in Union County, NJ start at $625,000, averaging $1,109,999, and reaching up to $1,750,000 — 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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    Featured Union County Real Estate Agencies

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

    Better Homes and Gardens RE Elite
    181 North Ave East Cranford, NJ 07016
    Phone: 19083168530
    coldwell banker liberty
    67 ELMORA AVE Elizabeth, NJ 07202
    Phone: 19085271711
    www.homesliberty.com
    Century 21 Real Estate Group
    1824 Front Scotch Plains, NJ 07076
    Phone: 19083222901
    www.century21realestategroupnj.com
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