"Greentree"

 residence, LIGC - Long Island Gold Coast, historical building, Colonial Revival (architecture)

"Greentree" is a 400-acre estate in Manhasset, one of the last mostly intact LIGC estates on Long Island. W. Payne Whitney purchased the estate around the turn of the last century for his bride, Helen Julia Hay. The five family farms that were purchased to make up the new estate were the Mitchell, Ketchum, Brinkerhoff, Skidmore, and Schenck farms. When he passed in 1927, his son John Hay "Jock" Whitney and his second wife, Betsey Cushing Roosevelt Whitney, occupied the main house, where Mrs. Whitney remained in residence there until her death in 1998. The estate features a real tennis court in good condition, but it is no longer in use. The estate includes numerous large stable buildings, as the Whitney's were avid horse breeders and racers. The Mitchell homestead which was on the property as since burned down. Rambling Dutch Colonial for W. Payne Whitney by d'Hauteville & Cooper c. 1903 with interior decorating by Sister Parish. Guy Lowell{Harbor Hill, Planting Fields} designed landscaping. John Hay "Jock" Whitney later inherited estate.

The Greentree Foundation now occupies the property. Mrs. Whitney first set up the Foundation in 1982, the year Mr. Whitney died. As now, her original aim was "to advance human understanding" by hosting meetings of world leaders and diplomats at the estate's secluded, retreat-like-setting. The estate hosted the Manhasset negotiations in 2007, a round of talks between Morocco and the Polisario Front, as part of a set of UN-led meetings.

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