Mount Sinai, NY Office Spaces for Rent & Lease

Updated: Jun 2

Multi-Tenant Office Building

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

$14.50 SF/Yr

Multi‑tenant office building built in 1988
Modified gross leases include gas and water; utilities are $3.50 psf
Fiber optic data cable and 24/7 tenant access with security camera system
Elevator service to all floors
On‑site parking with good tenant signage

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Updated: Nov 24, 2025

Retail and Medical Office Space

2 Myrtle St, Mt Sinai, NY

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42,800 sqft

Approved Planned Development District (PDD) Master Plan allows for diverse uses.
High‑traffic location on four‑lane Route 25A, near Route 112.
Development includes a new 4‑way signalized intersection at 25A and Myrtle Street.
Potential for 15,400 sf of retail space suitable for a market/grocery anchor.
Divisible 5,000 SF pad site with drive‑through potential.

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Divisible Pad Site For Rent

9 Myrtle St, Mt Sinai, NY

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5,000 sqft

Divisible pad site with drive-through available for rent.

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Mount Sinai Office Space Available

28 N Country Rd, Mount Sinai, NY 11766

$14.50 SF/Yr

Office space for rent near Port Jefferson Village.

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Retail and Medical Development Opportunity

12 Myrtle St, Mount Sinai, NY 11766

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88,200 sqft

Land available for retail, medical office, and luxury rentals.

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Based on your search, we've compiled 14 Potential Opportunities for your consideration. Besides 5 Active listings in Mount Sinai, NY, we suggest exploring alternatives. Consider Similar 4 Spaces in Nearby Cities, and Similar 1 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 in Historic Building

903 Main Street, Port Jefferson, NY 11777

$825/Mo

Bright front-of-building suite on the second floor with hardwood floors and dedicated mini-split A/C; parking included.

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Newly Renovated Medical Office Suite

41 Echo Avenue, Miller Place, NY 11764

$4,850/Mo

ADA-compliant medical office with a welcoming waiting room, separate employee entry, and ample on-site parking.

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Renovated Medical Office Suite

41 Echo Avenue, Miller Place, NY 11764

$4,850/Mo

Newly renovated ADA-compliant medical office with a waiting room, separate employee entrance, and 15 on-site parking spaces.

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Second-Floor Private Office Suite

903 Main St 203, Port Jefferson, NY 11777

$825/Mo

Bright second-floor office with original hardwood floors, dedicated A/C, and included parking in Port Jefferson Village.

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Similar Spaces for Sale in Mount Sinai, NY

Consider Similar Space for Sale. We found 1 Spaces matching your search parameters.

Commercial Development Sites on Route 25A

Mount Sinai, NY 11766

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87,000 sqft 8.54 AC lot

Two contiguous commercial development sites for sale on Route 25A.

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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.

Corner Lot on Busy Road

574 Montauk Highway, Shirley, NY 11967

$1,500/Mo

High-visibility commercial land for lease on a busy road.

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Commercial Land in High-Traffic Area

586 Montauk Highway, Shirley, NY 11967

$1,000/Mo

0.18 acre vacant lot with high visibility and traffic.

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Prime Land for Ground Lease

Shirley, NY 11967

Contact for pricing

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

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Prime Retail Corridor Land Lease

550 William Floyd Pkwy, Shirley, NY 11967

$10,000/Mo

20,245 sq ft land for lease in Shirley, NY.

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Mount Sinai, NY Office Spaces Market Trends and Statistics

Explore Office Spaces leasing options in Mount Sinai, NY with 5 listings featured on our commercial real estate exchange. The current inventory includes 136,000 square feet of properties with an estimated lease value of $29 SF/Yr.

Estimated lease rates for Office Spaces in Mount Sinai, NY begin at $14.50 SF/Yr, with an average of $14.50 SF/Yr and extend to $14.50 SF/Yr.