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    Flanders, NY Commercial Real Estate for Sale

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    Calverton, NY Manorville, NY Speonk, NY
    42 results
    Medical/Office Building in Riverhead
    $750,000
    1,452 SF

    Medical/Office Building in Riverhead

    976 Roanoke Avenue, Riverhead, NY 11901

    Professional building suitable for medical, wellness, or general office use.

    • Prime location on Roanoke Avenue with high visibility and strong traffic exposure, near Peconic Bay Medical Center and Route 58 retail corridor.
    • Ideal for medical or professional office use with multiple exam/treatment rooms, reception area potential, and flexible floor plan.
    • Generous 9,500+ SF lot with on‑site parking, private driveway, and expansion potential.
    • Easy access to major roadways including Long Island Expressway (I‑495).
    • Central air conditioning and ADA adaptability potential.
    Updated: Apr 16
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    Riverhead Investment Opportunity
    $989,000
    3,500 SF

    Riverhead Investment Opportunity

    761 E Main Street, Riverhead, NY 11901

    Commercially zoned property with income-producing homes in Riverhead, NY.

    • Commercially Zoned (DC‑3) in Prime Riverhead Location on East Main Street
    • Two income‑producing homes: 3,500 sq. ft. Victorian with 4 bedrooms and a cozy 2‑bedroom cottage
    • Additional 1700 sq ft building with potential for a third residence or townhouse development
    • .62 acre park‑like setting featuring a Victorian masterpiece with original oak floors, ribbed oak columns, and grand mirrored oak fireplace
    • Finished basement with CO's for living space and outside entrance, plus a walk‑up finished attic with soaring ceilings
    Updated: Mar 18
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    Riverhead Commercial Property For Sale
    $3,990,000
    1.75 Acres

    Riverhead Commercial Property For Sale

    Multi-unit commercial property in Long Island's North Fork wine corridor.

    3225 Sound Ave, Riverhead, NY 11901
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    Riverfront Commercial Land Opportunity
    $400,000
    1.50 Acres

    Riverfront Commercial Land Opportunity

    1.5-acre commercial-zoned land parcel on the Peconic River.

    1011-1021 W Main Street, Riverhead, NY 11901
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    Turnkey Automotive Repair Business Included
    $1,650,000
    0.20 Acres

    Turnkey Automotive Repair Business Included

    Established automotive repair business and property for sale in Riverhead.

    944 E Main Street, Riverhead, NY 11901
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    Flanders Commercial Property for Sale
    $2,400,000
    3,750 SF

    Flanders Commercial Property for Sale

    1.5-acre property with income potential in Flanders, NY.

    669 Flanders Road, Flanders, NY 11901
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    Riverhead Commercial Property For Sale
    $3,999,000
    1.75 Acres

    Riverhead Commercial Property For Sale

    Multi-unit commercial property in Long Island's North Fork wine corridor.

    3225 Sound Avenue, Riverhead, NY 11901
    View details
    Riverhead Mixed-Use Building For Sale
    $715,000

    Riverhead Mixed-Use Building For Sale

    Two-story, 1,200 SF building on .26 acre in Riverhead.

    1161 West Main Street, Riverhead, NY 11901
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    Medical/Office Building on Roanoke Avenue
    $750,000
    1,452 SF

    Medical/Office Building on Roanoke Avenue

    Professional building suitable for medical, wellness, or general office use.

    976 Roanoke Ave, Riverhead, NY 11901
    View details
    Riverhead Office Building For Sale
    $650,000
    2,437 SF

    Riverhead Office Building For Sale

    Two-story office building in downtown Riverhead with parking.

    211 Roanoke Ave, Riverhead, NY 11901
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    Prime Development Land on Route 25
    $435,000
    0.92 Acres

    Prime Development Land on Route 25

    0.92 acre parcel zoned for diverse commercial uses.

    1124 W Main St, Riverhead, NY 11901
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    Cleared Land on North Fork
    $450,000
    1.07 Acres

    Cleared Land on North Fork

    Cleared, flat lot ready for your North Fork homestead.

    3921 Sound Avenue, Riverhead, NY 11901
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    Leased Ben & Jerry’s Investment
    $950,000
    1,800 SF

    Leased Ben & Jerry’s Investment

    Fully leased property in Downtown Riverhead with long-term tenant.

    87 E Main St, Riverhead, NY 11901
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    Riverhead Restaurant/Warehouse with Parking
    $1,388,000
    5,600 SF

    Riverhead Restaurant/Warehouse with Parking

    5,600+ sqft restaurant/warehouse with large parking lot for sale.

    1175 W Main Street, Riverhead, NY 11901
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    Subdividable Commercial Land For Sale
    $7,950,000
    10,000 SF

    Subdividable Commercial Land For Sale

    8 acres of subdividable commercial land in Riverhead, NY.

    845 Raynor Ave, Riverhead, NY 11901
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    Established Automotive Business Opportunity
    $779,000
    0.15 Acres

    Established Automotive Business Opportunity

    Prime commercial location with long-standing auto business in Riverhead.

    1181 E Main St, Riverhead, NY 11901
    View details
    Medical Office Building on Old Country Road
    $1,575,000
    3,446 SF

    Medical Office Building on Old Country Road

    Two-unit medical office building in Riverhead, ideal for owner/user.

    1190 Old Country Rd, Riverhead, NY 11901
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    Waterfront Property in Riverhead
    $799,999
    2,892 SF

    Waterfront Property in Riverhead

    2,892 sq. ft. waterfront property with redevelopment potential.

    849-853 W Main St, Riverhead, NY 11901
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    Riverhead Mixed-Use Riverfront Property
    $715,000
    1,200 SF

    Riverhead Mixed-Use Riverfront Property

    Two-story, 1,200 SF building on .26 acre in Riverhead.

    1161 W Main St, Riverhead, NY 11901
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    Commercial
    $1,650,000

    Commercial

    Auto shops

    944 E Main St, Riverhead, NY 11901
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    Cleared North Fork Homestead Lot
    $450,000

    Cleared North Fork Homestead Lot

    Cleared, flat lot ready for a North Fork homestead.

    3921 Sound Avenue, Riverhead, NY 11901
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    Riverhead Development Site For Sale
    $3,750,000
    165,528 SF

    Riverhead Development Site For Sale

    3.8 acre development site in Riverhead Township.

    139 Main Rd, Riverhead, NY 11901
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    Dream Finca Near Alto San Juan
    $350,000

    Dream Finca Near Alto San Juan

    Spacious 5.6-acre finca with unobstructed views and building platforms.

    Riverhead, 11901
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    164 Hectare Finca in San Isidro
    $6,000,000

    164 Hectare Finca in San Isidro

    164-hectare finca with development potential in Santa Elena, Pérez Zeledón.

    Riverhead, 11901
    View details

    Flanders, NY Commercial Real Estate Investment Opportunities Market Analysis

    Explore 58 commercial real estate for sale in Flanders, NY, showcased through 42 active listings on our real estate platform. These investment opportunities span a total of 234,093 square feet of properties for sale, with an estimated market value of $37,825,999.

    Sale prices for business properties in Flanders, NY start at $550,000, averaging $2,364,124, and reaching up to $7,950,000 — 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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    Demographics Overview

    Population 33K
    Population Growth (5Y) +19.8%
    Median Household Income $83,252
    College Educated 30.4%

    High-Yield Neighborhoods for Strategic Investment

    Identify Flanders submarkets with the highest inventory density on the market and evaluate the median listing prices of real estate assets

    Neighborhood Average Price
    Riverhead - 11901 $2.4M

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    Most Searched ZIP Codes in Flanders, NY

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    • 11931
    • 11933

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