St John’s University has sold its 170-acre Oakdale campus to Amity University, a nonprofit international educational organization, for $22.4M.

The deal was closed by a capital markets team of Helen Hwang and Karen Wiedenmann and a Cushman & Wakefield team of Andrew Merin, David Bernhaut, Gary Gabriel, Brian Whitmer, Ryan Dowd and David Pennetta. Located in Long Island’s Great South Bay, the campus has 11 buildings totaling 260k SF.

The campus originally served as the waterfront estate of Singer Sewing Machine Co president Frederick Bourne, with his Georgian Mansion still sitting at its heart. It was then converted to the LaSalle Military Academy, and then to a kindergarten-through-high school global learning community.

Bought by St. John’s in 1998, the campus received $10M in renovations. St. John’s will continue to offer classes until 2017 under a lease agreement. Amity University immediately assumed control of the property.