Mount Sinai, NY Office Spaces for Rent & Lease

Updated: Mar 26

Mount Sinai Office Space Available

Portview Building - 28 N. Country Road, Mount Sinai, NY 11766

$14.50 SF/Yr

Prime location near Port Jefferson Village, Long Island Railroad, and two local hospitals.
Modified gross leases are available.
Gas and water included in lease.
Suitable for office and executive suite tenants.
Electric cost is $3.50 psf.

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Updated: Mar 7, 2025

Divisible Pad Site For Rent

9 Myrtle St, Mt Sinai, NY

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5,000 sqft 0.75 AC lot

Approved Planned Development District (PDD) allows for a mix of retail, medical office, and a 140‑unit luxury rental complex.
Located on a four‑lane Route 25A, offering high visibility and accessibility.
New 4‑way signalized intersection at 25A and Myrtle Street to be constructed by the master developer.
Includes a planned 15,400 sf retail anchor space suitable for a market or grocery store.
Features a 5,000 SF divisible pad site with drive‑through potential.

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Retail and Medical Office Space

2 Myrtle St, Mt Sinai, NY

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42,800 sqft 0.46 AC lot

Planned development with retail, medical office, and luxury rentals.

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Based on your search, we've compiled 12 Potential Opportunities for your consideration. Besides 3 Active listings in Mount Sinai, NY, we suggest exploring alternatives. Consider Similar 4 Spaces in Nearby Cities, and Similar 3 Properties for Sales.

Office Spaces for Lease in Nearby Cities

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

Second-Floor Office Suite

903 Main Street, Port Jefferson, NY 11777

$825/Mo

0.75 AC lot

Private workspace with hardwood flooring, dedicated air conditioning, storage, and included parking.

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Office Unit Near Hospitals

640 Belle Terre Road unit E-3, Port Jefferson, NY 11777

$900/Mo

Office space offers access to nearby hospitals and rail service, with major roadway connections.

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Renovated Spa & Wellness Space

B-59 Nesconset Hwy, Port Jefferson Station, NY 11776

$1,000/Mo

First-floor private or shared space with treatment furnishings, storage, sink, bathroom access, parking, and included utilities.

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End-Cap Medical Office with Large Windows

102 Main St, Port Jefferson Station, NY 11776

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5,000 sqft

Built medical office end-cap with large windows, seven exam rooms, lead-lined x-ray room, and ample parking.

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Similar Spaces for Sale in Mount Sinai, NY

Consider Similar Space for Sale. We found 3 Spaces matching your search parameters.

Freestanding Office Building

365 Route 25A, Mount Sinai, NY 11766

$1,699,000

0.14 AC lot

J-2 zoning and a flexible interior support a range of neighborhood business uses.

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Commercial Development Opportunity on Route 25A

12 Myrtle Street, Mount Sinai, NY 11766

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88,000 sqft

Prime commercial land with development potential near major hospitals.

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Commercial Development Sites For Sale

12 Myrtle Street, Mount Sinai, NY 11766

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87,000 sqft 8.54 AC lot

Two contiguous commercial development sites available for sale.

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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.

Fenced Commercial Land

586 Montauk Highway, Shirley, NY 11967

$1,000/Mo

0.18 AC lot

Fenced vacant parcel beside a grocery and deli with cable availability and private water.

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Prime Land for Ground Lease

550 William Floyd Parkway, Shirley, NY 11967

$10,000/Mo

0.46 AC lot

20,245 sq ft land in high-traffic retail corridor.

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Mount Sinai, NY Office Spaces Lease Rates & Market Statistics

Browse 3 Office Spaces for lease in Mount Sinai, NY on Realmo, a commercial real estate marketplace serving the Mount Sinai area. The current inventory totals 47,800 square feet of properties.

Asking lease rates for Office Spaces in Mount Sinai start at $14.50 SF/Yr, average $14.50 SF/Yr, and reach $14.50 SF/Yr at the top of the market. Pricing across the market is relatively uniform, which simplifies like-for-like comparison between listings. The local average of $14.50 SF/Yr is 53% below the New York state average of $31.13 SF/Yr.

Mount Sinai accounts for 1% of the 391 office spaces currently available across Suffolk County, where nearby markets include Huntington and Melville.