Largest Office Property Sales on Long Island

Exterior of 50 Quadrangle, Jericho, NY

1. Jericho Quadrangle
Address: 50 Quadrangle, Jericho, NY 11753
Sale Date: June 1, 2026
Sale Price: $22,500,000
PSF: $160.72

TPG Angelo Gordon & Co. LP sold the Jericho Quadrangle to MDJ Realty Services LLC. The building was reportedly 75% leased at the time of sale.

This building consists of 139,991 square-feet, is three-stories tall, and was built in 2005. The building is considered class A, the property has 550 on-site parking spaces available, and the building sits on 7.61 acres of land.

This property is located just North of the Long Island Expy and is located near other office properties such as a veterinarian, an oral & maxillofacial surgery center, and a pediatrics office.

2. Office Building in Melville, NY
Address: 576 Broadhollow Rd, Melville, NY 11747
Sale Date: May 8, 2026
Sale Price: $13,150,000
Price/SF: $190.50

G2D Development Corp sold this office building in Melville, NY to MediSys Health Network Inc. The building was reportedly 56.5% occupied at the time of sale.

This building is 69,029 square-feet, is two- stories tall, and was built in 1970. There are 280 on-site parking spaces and the building sits on 4.65 acres of land.

This property is located North of Republic Airport and Farmingdale State College but South of the Long Island Expy. It is located across from the USPS Mid-Island Processing and Distribution Center.

Exterior of 576 Broadhollow Rd, Melville, NY

3. Office Building in Westbury, NY
Address: 900 Merchants Concourse, Westbury, NY 11590
Sale Date: April 7, 2026
Sale Price: $12,500,000
Price/SF: $81.97

Vectra Management Group sold this office building in Westbury, NY to Valley East Building Management. The building was reportedly 40% leased at the time of sale.

This office building consists of 152,489 square-feet, is five-stories tall, and was built in 1969. The building is considered Class A, has 4 elevators, and the property has 550 on-site parking spaces. The building sits on 6.06 acres of land.

This property is situated next to The Mall at The Source which has several restaurants and arcade amenities. It is located a short distance from the Meadowbrook State Pkwy and Stewart Ave which has several other office properties.

Exterior of 900 Merchants Concourse, Westbury, NY

4. Medical Office Building in Patchogue, NY
Address: 450 Waverly Ave, Patchogue, NY 11772
Sale Date: April 23, 2026
Sale Price: $6,750,000
Price/SF: $1,341.68

Howard Kopel sold this medical office building in Patchogue, NY to Silverrock Equities LLC. The property traded at an 8.42% cap rate.

This building consists of 5,031 square-feet, is one-story tall, and was built in 1988. There are 150 on-site parking spaces and the building sits on 3.24 acres of land.

This property is situated next to other medical offices such as a dentist, a gastroenterologist, and a pediatric cardiologist. This property is located East of Nicolls Rd and just North of Sunrise Hwy.

Exterior of 450 Waverly Ave, Patchogue, NY

5. Office Building in Hauppauge, NY
Address: 140 Fell Ct, Hauppauge, NY 11788
Sale Date: April 22, 2026
Sale Price: $5,800,000
Price/SF: $121.26

AccountantsWorld, LLC sold this office building in Hauppauge, NY to Certified Interiors, Inc.

This office building consists of 47,831 square-feet, is four-stories tall, and was built in 1988. There are 200 on-site parking spaces and the building sits on 2.47 acres of land.

This property is situated just North of the Long Island Expy and is surrounded by various other office spaces in Hauppauge.

Exterior of 140 Fell Ct, Hauppauge, NY

6. Medical Office in Bohemia, NY
Address: 3250 Veterans Memorial Hwy, Bohemia, NY 11716
Sale Date: May 7, 2026
Sale Price: $3,000,000
Price/SF: $329.67

Production Service & Sales sold this medical office building in Bohemia, NY to an undisclosed buyer. The property was reportedly fully-leased at the time of sale.

This building consists of 9,100 square-feet, is one-story tall, and was built in 1977. There are 43 on-site parking spaces and the building sits on 0.85 acres of land.

This property is surrounded by some industrial sites in Bohemia and is located just West of the Long Island MacArthur Airport. It is also located 3 miles from the Ronkonkoma LIRR train station.

Exterior of 3250 Veterans Memorial Hwy, Bohemia, NY

7. Medical Office in Seaford, NY
Address: 4100 Duff Pl, Seaford, NY 11783
Sale Date: June 12, 2026
Sale Price: $2,515,507
Price/SF: $347.54

Integrated Medical Professionals, PLLC sold this medical office building in Seaford, NY to an undisclosed buyer. The property reportedly traded at a 7.5% cap rate.

This medical office building consists of 7,238 square-feet, is two-stories tall, and was built in 1977. There are 32 on-site parking spaces and the building sits on 0.38 acres.

This property is located just next to the Seaford-Oyster Bay Expy and North of the Southern State Pkwy.

Exterior of 4100 Duff Pl, Seaford, NY

8. Lynbrook Medical and Professional Center
Address: 10 Union Ave, Lynbrook, NY 11563
Sale Date: May 14, 2026
Sale Price: $2,475,000
Price/SF: $260.53

10 Union Avenue Lynbrook LLC sold this medical and professional building to an undisclosed buyer. The property reportedly traded at a 6.62% cap rate.

This building consists of 9,500 square-feet, is one-story tall, and was built in 1952. There are 21 on-site parking spaces and the building is situated on 0.56 acres of land.

This property is located on the corner of Union Ave and Atlantic Ave, across the street from Lynbrook High School. This property is located in the heart of Lynbrook and is surrounded by various local retail, offices, and amenities. It is within walking distance to Sunrise Hwy and the Lynbrook LIRR train station.

Exterior of 10 Union Ave, Lynbrook, NY

9. Office Building in Port Jefferson, NY
Address: 1000 Main St, Port Jefferson, NY 11777
Sale Date: April 24, 2026
Sale Price: $1,900,000
Price/SF: $243.59

McAllister Towing & Transportation Co. Inc sold this office building in Port Jefferson, NY to an undisclosed buyer. The property was reportedly fully-leased at the time of sale.

This building consists of 7,800 square-feet, is three-stories tall, and was built in 1980. There is one elevator and there are 20 on-site parking spaces.

This property is located on the corner of the signalized intersection of Main St and Sheep Pasture Rd. It is located within walking distance to the Port Jefferson LIRR train station and is surrounded by various other retail and office amenities.

Exterior of 1000 Main St, Port Jefferson, NY

10. Office Building in Greenvale, NY
Address: 73 Glen Cove Rd, Greenvale, NY 11548
Sale Date: April 8, 2026
Sale Price: $1,850,000
Price/SF: $698.64

Rowkin Associates Inc sold this office building in Greenvale, NY to 73 Glen Cove Road Bh LLC. The property was reportedly vacant at the time of sale.

This building consists of 2,648 square-feet, is one-story tall, and was built in 1990. There are 13 on-site parking spaces and the building sits on 0.18 acres of land.

This property is located just South within walking distance to the Greenvale LIRR train station and is surrounded by various restaurants and medical offices. It is located just North of Northern Blvd which has high daily traffic counts.