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    Mount Sinai, NY
    Office

    Mount Sinai, NY Office Spaces for Sale

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    Brookhaven, NY Port Jefferson, NY Miller Place, NY Strongs Neck, NY Rocky Point, NY Coram, NY Stonybrook, NY Selden, NY
    Freestanding Office Building
    Updated: Oct 13
    Freestanding Office Building

    365 Route 25A, Mount Sinai, NY 11766

    $1,699,000
    0.14 AC lot
    Approximately 2,152 sq. ft. freestanding brick office building
    0.14‑acre parcel
    Approximately 60 feet of frontage on Route 25A
    On‑site lot with 10 marked parking spaces
    J‑2 (Neighborhood Business) zoning
    View details
    Commercial Development Sites For Sale
    Updated: Jan 27
    Commercial Development Sites For Sale

    12 Myrtle Street, Mount Sinai, NY 11766

    Contact for pricing
    87,000 sqft 8.54 AC lot
    High‑traffic location on Route 25A with 40,000+ ADDT, offering excellent visibility and accessibility.
    Part of a Planned Development (PDD) with an experienced Master Developer, ensuring coordinated development and quality.
    Preliminary approval in place and available public sewer connection, streamlining the development process.
    New 4‑way signalized intersection at Route 25A and Myrtle Street, enhancing site access and safety.**
    Immediate proximity to major hospitals (JT Mather/Northwell, St Charles/CHS, Stony Brook University Hospital), ideal for medical‑related businesses.
    View details
    Commercial Development Opportunity on Route 25A
    Commercial Development Opportunity on Route 25A

    12 Myrtle Street, Mount Sinai, NY 11766

    Contact for pricing
    88,000 sqft

    Prime commercial land with development potential near major hospitals.

    View details
    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
    3 active listings match your search: Office for sale in Mount Sinai, NY. Based on your search, we've also compiled 14 Potential Opportunities for your consideration: 4 properties in nearby cities, 6 off-market properties to explore as potential leads, and 4 land listings with development potential.

    Opportunities in Nearby Cities

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

    Mixed-Use Retail/Office Building
    Mixed-Use Retail/Office Building

    228 East Main Street, Port Jefferson, NY 11777

    $1,649,000
    8,535 sqft

    Historic commercial space along Port Jefferson’s East Main Street corridor.

    View details
    Medical Office Building
    Medical Office Building

    5330 Nesconset Highway, Port Jefferson Station, NY 11776

    Contact for pricing
    2,984 sqft

    Flexible interior arrangements support medical or professional office use.

    View details
    Two-Level Office Building
    Two-Level Office Building

    903 Main Street, Port Jefferson, NY 11777

    Contact for pricing

    Private suites combine natural light, hardwood floors, storage, and dedicated mini-split air-conditioning.

    View details
    J4-Zoned Office Building
    J4-Zoned Office Building

    5400 Nesconset Hwy, Port Jefferson Station, NY 11776

    Contact for pricing

    The property is offered through a sale-leaseback in Port Jefferson Station.

    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.

    J-2 Zoned Commercial Land
    J-2 Zoned Commercial Land

    N Country Roads, Rocky Point, NY

    $390,000
    0.41 AC lot

    Commercial land in Rocky Point with J-2 zoning and potential for office, retail, workshop, and automotive-oriented uses.

    View details
    Commercial Land with Build-to-Suit Plan
    Commercial Land with Build-to-Suit Plan

    34-41 Montauk Highway, East Moriches, NY 11940

    $1,289,000
    1.45 AC lot

    Comm-zoned parcel with septic tank service and a proposed two-building commercial development concept.

    View details
    HB-Zoned Commercial Land
    HB-Zoned Commercial Land

    385 New Suffolk Avenue, Mattituck, NY 11952

    $2,075,000
    2.38 AC lot

    Mattituck business-district parcel with commercial, residential, and mixed-use development possibilities.

    View details
    Commercial Land Across From Apartments
    Commercial Land Across From Apartments

    770 N Broadway, Amityville, NY 11701

    $1,999,990
    0.95 AC lot

    E Business zoning with public water and public sewer serves the commercial parcel.

    View details

    Off-Market Properties in Mount Sinai, NY

    Consider similar Off-Market properties in Mount Sinai, 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.

    28 Country Rd
    OFFICE BUILDING

    28 Country Rd, Mount Sinai, NY 11766-1518

    Estimated value:
    $2,400,000
    0.95 AC lot
    View details
    281 Rte 25a
    PROFESSIONAL BUILDING

    281 Rte 25a, Mount Sinai, NY 11766-2057

    Estimated value:
    $295,000
    0.42 AC lot
    View details
    Rte 25a
    OFFICE BUILDING

    Rte 25a, Mount Sinai, NY 11766

    Estimated value:
    $290,000
    0.30 AC lot
    View details
    5499-5505 Nesconset Hwy
    Medical Office Space

    5499-5505 Nesconset Hwy, Mount Sinai, NY 11766

    Estimated value: by Request
    131,396 sqft
    View details
    12 Myrtle St
    Medical Office Space

    12 Myrtle St, Mount Sinai, NY 11766

    Estimated value: by Request
    87,000 sqft 8.54 AC lot
    View details
    12 Myrtle St
    Office Spaces

    12 Myrtle St, Mount Sinai, NY 11766

    Estimated value: by Request
    88,000 sqft
    View details

    Mount Sinai, NY Office Spaces Market Trends and Statistics

    Explore 9 office spaces for sale in Mount Sinai, NY, showcased through 3 active listings on our real estate platform. These investment opportunities span a total of 175,000 square feet of properties for sale, with an estimated market value of $1,699,000.

    Sale prices for office properties in Mount Sinai, NY average $1,699,000 — 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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    Top Commercial Asset Segments

    Commercial property segments ranked by active listings on the market

    Medical Office Space 3
    Office buildings 1
    Office Units 1

    Demographics Overview

    Population 11K
    Population Growth (5Y) -7.5%
    Median Household Income $157,564
    College Educated 77.7%

    High-Yield Neighborhoods for Investment

    Identify Mount Sinai submarkets with the highest inventory density on the market and evaluate the average listing prices of real estate assets

    Neighborhood Average Price
    11766 $1.7M

    Listings Trend

    New vs delisted commercial listings in Suffolk County

    New Delisted

    Total CRE Inventory on Market (SF)

    How Realmo verifies these figures

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