Largest Office Property Sales on Long Island

Exterior of 440-450 Northern Blvd, Great Neck, NY

1. Medical Office Building in Great Neck, NY
Address: 440-450 Northern Blvd, Great Neck, NY 11021
Sale Date: July 2, 2025
Sale Price: $6,100,000
PSF: $341.93

Agae LLC sold this medical office building in Great Neck, NY to Quadcare LLC. The building was reportedly vacant at the time of sale and it was reported that the purchaser plans to use the property as an owner-user building.

This office building is composed of 17,840 square-feet, is one story tall, and was built in 1966. It was later renovated in 2007 and there are 38 on-site parking spaces.

Northern Blvd receives high traffic counts of 28,662 cars per day. This property is located close to the heart of Great Neck and the Great Neck LIRR train station. It is located West of Lakeville Rd and North of the Long Island Expy. This property is surrounded by various other neighborhood office and medical buildings.

2. Office Building in Montauk, NY
Address: 649 Montauk Hwy, Montauk, NY 11954
Sale Date: July 22, 2025
Sale Price: $3,600,000
Price/SF: $1,200

555 Marchuska LLC sold this office building in Montauk, NY to New York Pilates. The property reportedly traded at a 3.05% cap rate.

This building consists of 3,000 square-feet, is two stories tall, and was built in 1985. There are 12 on-site parking spots and Montauk Hwy receives traffic counts of 8,909 cars per day.

This property is located a short distance from the heart of Montauk with several restaurants, shops, and office buildings.

Exterior of 649 Montauk Hwy, Montauk, NY

3. Medical Office Building in Westbury, NY
Address: 675 Old Country Rd, Westbury, NY 11590
Sale Date: September 15, 2025
Sale Price: $2,300,000
Price/SF: $339.83

Mandelup & Pryor Realty Company sold this medical office building in Westbury, NY to an undisclosed buyer. The building was reportedly fully-occupied at the time of sale.

This building consists of 6,768 square-feet, is one story tall, and was built in 1969. There are 40 on-site parking spaces and the property is zoned for B-A.

Old Country Rd receives high daily traffic counts of 35,864 cars per day. This property is located a short distance from the Wantagh State Pkwy and the Westbury LIRR train station. Old Country Rd has several other medical office buildings as well as traditional office spaces.

Exterior of 675 Old Country Rd, Westbury, NY

4. Medical Office Building in Williston Park, NY
Address: 275 Hillside Ave, Williston Park, NY 11596
Sale Date: August 19, 2025
Sale Price: $2,200,000
Price/SF: $415

Hagop Roberts Properties Inc sold this medical office building in Williston Park, NY to an undisclosed buyer.

This office consists of 5,300 square-feet, is two stories tall, and was built in 1957. It was later renovated in 2009.

Hillside Ave receives high daily traffic counts of 25,225 cars per day. This property is located near several other medical offices on Hillside Ave and is located a short distance from the East Williston LIRR train station.

Exterior of 275 Hillside Ave, Williston Park, NY

5. Office Building in Patchogue, NY
Address: 15-17 Oak St, Patchogue, NY 11772
Sale Date: August 11, 2025
Sale Price: $1,895,000
Price/SF: $210.56

Day for a Daydream LLC sold this office building in Patchogue, NY to Straight Set Realty LLC. This property was reportedly fully-occupied at the time of sale.

This building consists of 9,000 square-feet, is one story tall, and was built in 1960. There are 19 on-site parking spaces and the property is zoned for D3.

This property is located just North of Montauk Hwy which has several retail and office buildings. It is also located in close proximity to the Patchogue LIRR train station.

Exterior of 15-17 Oak St, Patchogue, NY

6. Office Building in Mineola, NY
Address: 169 Liberty Ave, Mineola, NY 11501
Sale Date: July 21, 2025
Sale Price: $1,750,000
Price/SF: $325.52

Grand Properties LLC sold this office building in Mineola, NY to Ggm Liberty Ave LLC. This property was reportedly fully-occupied at the time of sale.

This building consists of 5,376 square-feet, is one story tall, and was built in 1950. There are 8 on-site parking spaces and the property is zoned as Manufacturing Industrial.

This property is located West of several major shopping centers in the area such as Parkway Plaza, Country Glen Center, Roosevelt Field shopping mall, and several others. It is surrounded by other office buildings and is located in close proximity to the Mineola LIRR train station.

Exterior of 169 Liberty Ave, Mineola, NY

7. Office Building in Island Park, NY
Address: 25 Nassau Ln, Island Park, NY 11558
Sale Date: August 29, 2025
Sale Price: $1,700,000
Price/SF: $196

25 Nassau Lane LLC sold this office building in Island Park, NY to an undisclosed buyer.

This building consists of 8,664 square-feet, is one story tall, and was built in 1970. It was later renovated in 2009. There are 14 on-site parking spaces.

This property is located adjacent to the Island Park LIRR train station and just West of Austin Blvd. There are a few bus stops nearby that run on the n15 line. There are several other office buildings in the Island Park area that are located in close proximity to this property. These buildings include non-profit organizations, general contracting offices, Island Park Village Hall, and many others.

Exterior of 25 Nassau Ln, Island Park, NY

8. Office Building in Baldwin, NY
Address: 2504 Grand Ave, Baldwin, NY 11510
Sale Date: September 2, 2025
Sale Price: $1,600,000
Price/SF: $214.91

Long Term Realty Corp sold this office building in Baldwin, NY to The Beantown Companies. The property traded at a 7.7% cap rate.

This building consists of 7,445 square-feet, is two stories tall, and was built in 1920. There are 21 on-site parking spaces and the property consists of 0.25 acres.

This property is situated between Grand Ace and Foxhurst Rd. It is South of Merrick Rd but within walking distance to several businesses on Merrick Rd. There are many other office buildings surrounding this property such as occupational therapist office, dentist office, and more.

Exterior of 2504 Grand Ave, Baldwin, NY

9. Office Building in Mineola, NY
Address: 98 Willis Ave, Mineola, NY 11501
Sale Date: July 10, 2025
Sale Price: $1,600,000
Price/SF: $279

GWB Realty Associates LLC sold this office building in Mineola, NY to 98 & 100 Willis Realty LLC. The property was reportedly fully-leased at the time of sale.

This building consists of 5,730 square-feet, is two stories tall, and was built in 1984.

This property is located within walking distance to the Mineola LIRR train station. It is also a short distance away from several retail and office buildings located on Mineola Blvd and Old Country Rd. Some office spaces that surround this property include attorney offices, the USPS post office, child care agency, gutter cleaning services, and more.

Exterior of 98 Willis Ave, Mineola, NY

10. Office Building in Deer Park, NY
Address: 2070 Deer Park Ave, Deer Park, NY 11729
Sale Date: July 28, 2025
Sale Price: $1,575,000
Price/SF: $231.62

Deer Park Avenue LLC sold this office building in Deer Park, NY to Teamsters Local 802 LLC. The buyer was drawn to this property due to the interest in owner-occupying the first floor of the building and relocation.

This office building consists of 6,800 square-feet, is two stories tall, and was built in 1971. The building was built in 1971 and there are 22 on-site parking spaces.

This property is located on 0.21 acres of land. Deer Park Ave receives high daily traffic counts of 44,216 cars per day. There are several bus stops located along Deer Park Ave and this property is located a short distance from the Wyandanch LIRR train station. Deer Park Ave has several retail and office spaces along it. Some notable office spaces include family practice physicians, radiologists, dentist offices, an animal hospital, tax preparation offices, attorneys, and several more.