Mount Sinai, NY Office Spaces for Rent & Lease

$14 SF/Yr

Multi-Tenant Office Building

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

Modified gross terms include gas and water, with fiber optic service, elevator access, and on-site parking.

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

Updated: Jun 2

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42,800 SF

Retail and Medical Office Space

2 Myrtle St, Mt Sinai, NY

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

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.

Updated: Nov 24, 2025

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5,000 SF

Divisible Pad Site For Rent

Divisible pad site with drive-through available for rent.

9 Myrtle St, Mt Sinai, NY

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$14 SF/Yr

Mount Sinai Office Space Available

Office space for rent near Port Jefferson Village.

28 N Country Rd, Mount Sinai, NY 11766

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Retail and Medical Development Opportunity

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88,200 SF

Retail and Medical Development Opportunity

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

12 Myrtle St, Mount Sinai, NY 11766

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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.

$895/Mo

Historic Port Jefferson Office Suite

Bright, second-floor corner office in historic Port Jefferson Village.

903 Main St Suite 201, Port Jefferson, NY 11777

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$2,600/Mo

Office/Beauty Services Rooms Available

Five-room office space suitable for beauty services, parking available.

409 Patchogue Rd, Port Jefferson Station, NY 11776

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$25 SF/Yr

6,800 SF

Port Jefferson Station Office Space

6,800 SF office space available for lease.

170 N Country Rd, Port Jefferson Station, NY

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650 SF

Port Jefferson Office Space Available

650 square feet office space for rent in Port Jefferson.

625 Belle Terre Rd, Port Jefferson, NY

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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

Contact for pricing

87,000 SF

Commercial Development Sites on Route 25A

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

12 Myrtle St, Mt Sinai, NY 11766

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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.

$1,500/Mo

Corner Lot on Busy Road

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

574 Montauk Highway, Shirley, NY 11967

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$1,000/Mo

Commercial Land in High-Traffic Area

0.18 acre vacant lot with high visibility and traffic.

586 Montauk Highway, Shirley, NY 11967

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Prime Land for Ground Lease

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

550 William Floyd Parkway, Brookhaven, NY 11967

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$10,000/Mo

Prime Retail Corridor Land Lease

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

550 William Floyd Pkwy, Shirley, NY 11967

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Mount Sinai, NY Office Spaces Leasing Opportunities Market Analysis

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 SF/Yr, with an average of $14 SF/Yr and extend to $14 SF/Yr.

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