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    Riverhead, NY Office Buildings for Sale

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    Renovated Office Building in Riverhead
    $1,195,000

    Renovated Office Building in Riverhead

    21 E Second Street, Riverhead, NY 11901

    Professional office building in historic Riverhead district, renovated in 2017.

    • Completely renovated in 2017 with modern building systems and energy‑efficient features including solar panels and a high‑efficiency boiler.
    • Located in Riverhead’s historic, walkable district near Main Street.
    • Features 12 sound‑proofed private offices with electronic key‑lock access, multiple waiting areas, and a conference room.
    • Flexible layout suitable for a wide range of professional, medical, or administrative uses, including owner‑users or investors.
    • ADA‑compliant restrooms and a fully handicap‑accessible first floor.
    Updated: Mar 21
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    Riverhead Commercial Building Investment Opportunity
    $6,950,000
    26,235 SF

    Riverhead Commercial Building Investment Opportunity

    33 W 2nd St, Riverhead, NY 11901

    26,235 SF office building with credit tenant in place.

    • High 8% CAP Rate NNN Sale‑Leaseback: Provides a virtually unmatched yield.
    • Institutional‑Grade Credit Tenant: Offers stable income with minimized landlord responsibilities under a new 10‑year NNN lease.
    • Riverhead Opportunity Zone Location: Provides potential tax advantages tied to ongoing revitalization.
    • Strategic Downtown Riverhead Location: Positioned near civic anchors.
    • Flexible Building Layout: The 26,235sf building can be converted to multi‑tenant use.
    Updated: Jan 25, 2025
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    Based on your search, we've compiled 94 Potential Opportunities for your consideration. Besides 2 Active listings in Riverhead, NY, we suggest exploring several alternatives: 4 properties in Nearby Cities, and similar 84 Off-Market properties to explore as potential leads, plus 4 Land Listings that present a potential for development.

    Explore Opportunities in Nearby Cities

    Here are 4 Similar properties we found in Nearby Locations for your consideration.

    Professional Office Building on Route 25
    $1,000,000
    0.44 Acres

    Professional Office Building on Route 25

    3,486 SF office building with owner-user suite and lease-up upside.

    1814 Middle Country Road, Ridge, NY 11961
    View details
    Professional Office Building on Route 25
    $1,000,000
    0.44 Acres

    Professional Office Building on Route 25

    Professional office building with owner-user suite and lease-up upside.

    1814 Middle Country Road, Ridge, NY 11961
    View details
    Southampton Commercial Building with Highway Exposure
    $2,750,000
    6,000 SF

    Southampton Commercial Building with Highway Exposure

    6,000 SF professional office building in Southampton, NY for sale.

    2036 County Road 39, Southampton, NY 11968
    View details
    Southampton Village Office Building For Sale
    $3,200,000
    4,020 SF

    Southampton Village Office Building For Sale

    Located in the heart of Southampton Village Business District.

    51 Hill St, Southampton, NY
    View details

    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.

    Riverhead Retail Redevelopment Site
    $3,000,000

    Riverhead Retail Redevelopment Site

    One-acre retail site with redevelopment potential in Riverhead, NY.

    89 Peconic Avenue, Riverhead, NY 11901
    View details
    Retail Redevelopment Site on Peconic
    $3,000,000

    Retail Redevelopment Site on Peconic

    One-acre retail redevelopment site with approvals for restaurant and rentals.

    89 Peconic Avenue, Riverhead, NY 11901
    View details
    Riverhead Land Parcel For Sale
    Contact for pricing
    37.70 Acres

    Riverhead Land Parcel For Sale

    37.7-acre parcel with buildable area and wetlands.

    411 Old Country Rd, Riverhead, NY
    View details
    Commercial Land on Old Country
    Contact for pricing

    Commercial Land on Old Country

    Land with excellent visibility near retail center and commerce park.

    411 Old Country Rd, Riverhead, NY 11901
    View details

    Explore Off-Market Properties in Riverhead, NY

    Consider similar Off-Market properties in Riverhead, NY. 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.

    33 2nd St

    33 2nd St

    PROFESSIONAL BUILDING • 10,229 SF
    Value Estimation
    $3,025,000
    33 2nd St, Riverhead, NY 11901-2701
    View details
    212 Main St

    212 Main St

    OFFICE BUILDING • 4,126 SF
    Value Estimation
    $965,000
    212 Main St, Riverhead, NY 11901-2841
    View details
    46 2nd St

    46 2nd St

    OFFICE BUILDING • 8,894 SF
    Value Estimation by Request
    46 2nd St, Riverhead, NY 11901
    View details
    633 Main St

    633 Main St

    OFFICE BUILDING • 2,596 SF
    Value Estimation by Request
    633 Main St, Riverhead, NY 11901-7013
    View details
    1267 Main St

    1267 Main St

    PROFESSIONAL BUILDING • 8,808 SF
    Value Estimation
    $3,180,000
    1267 Main St, Riverhead, NY 11901-2676
    View details
    130 Ostrander Ave

    130 Ostrander Ave

    PROFESSIONAL BUILDING • 1,248 SF
    Value Estimation by Request
    130 Ostrander Ave, Riverhead, NY 11901-4642
    View details
    11-15 2nd St

    11-15 2nd St

    PROFESSIONAL BUILDING • 1,311 SF
    Value Estimation by Request
    11-15 2nd St, Riverhead, NY 11901
    View details
    246 Main St

    246 Main St

    PROFESSIONAL BUILDING • 2,812 SF
    Value Estimation
    $725,000
    246 Main St, Riverhead, NY 11901-2841
    View details
    244 Old Country Rd

    244 Old Country Rd

    OFFICE BUILDING • 10,000 SF
    Value Estimation
    $1,870,000
    244 Old Country Rd, Riverhead, NY 11901-2126
    View details
    400 Ostrander Ave

    400 Ostrander Ave

    OFFICE BUILDING • 5,765 SF
    Value Estimation
    $1,110,000
    400 Ostrander Ave, Riverhead, NY 11901-4614
    View details
    737 Roanoke Ave

    737 Roanoke Ave

    PROFESSIONAL BUILDING • 0.50 Acres
    Value Estimation
    $600,000
    737 Roanoke Ave, Riverhead, NY 11901-2729
    View details
    1224 Ostrander Ave

    1224 Ostrander Ave

    PROFESSIONAL BUILDING • 6,912 SF
    Value Estimation
    $2,780,000
    1224 Ostrander Ave, Riverhead, NY 11901-2109
    View details
    71 Main St

    71 Main St

    OFFICE BUILDING • 19,820 SF
    Value Estimation
    $1,730,000
    71 Main St, Riverhead, NY 11901-2422
    View details
    720 Old Country Rd, Unit 800

    720 Old Country Rd, Unit 800

    PROFESSIONAL BUILDING • 6.03 Acres
    Value Estimation by Request
    720 Old Country Rd, Riverhead, NY 11901-2152
    View details
    715 Roanoke Ave

    715 Roanoke Ave

    PROFESSIONAL BUILDING • 5,700 SF
    Value Estimation
    $5,445,000
    715 Roanoke Ave, Riverhead, NY 11901-2769
    View details
    508 Main Rd

    508 Main Rd

    PROFESSIONAL BUILDING • 1,979 SF
    Value Estimation
    $1,095,000
    508 Main Rd, Riverhead, NY 11901-1906
    View details
    240 Main St

    240 Main St

    OFFICE BUILDING • 5,250 SF
    Value Estimation
    $940,000
    240 Main St, Riverhead, NY 11901-2841
    View details
    1158 Main Rd

    1158 Main Rd

    PROFESSIONAL BUILDING • 2,050 SF
    Value Estimation
    $630,000
    1158 Main Rd, Riverhead, NY 11901-5728
    View details
    177 Old Country Rd

    177 Old Country Rd

    OFFICE BUILDING • 2,300 SF
    Value Estimation
    $840,000
    177 Old Country Rd, Riverhead, NY 11901-2119
    View details
    155 Flanders Rd

    155 Flanders Rd

    OFFICE BUILDING • 818 SF
    Value Estimation by Request
    155 Flanders Rd, Riverhead, NY 11901-3715
    View details
    1126 Ostrander Ave

    1126 Ostrander Ave

    PROFESSIONAL BUILDING • 1,824 SF
    Value Estimation by Request
    1126 Ostrander Ave, Riverhead, NY 11901-2619
    View details
    129 Ostrander Ave

    129 Ostrander Ave

    OFFICE BUILDING • 1,056 SF
    Value Estimation by Request
    129 Ostrander Ave, Riverhead, NY 11901-4643
    View details

    Riverhead, NY Office Buildings Investment Opportunities Market Analysis

    Explore 86 office buildings for sale in Riverhead, NY on our real estate platform. These investment opportunities span a total of 2,417,148 square feet of properties for sale, with an estimated market value of $53,915,000.

    Sale prices for office properties in Riverhead, NY start at $110,000, averaging $1,225,340, and reaching up to $21,610,000 — 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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