Manhasset Bay Group has been trying to develop a subdivision on the site since 2014 and reduced the proposed number of homes from 51 to 46 this year, with plans saying the houses would sit on lots between a half-acre and one acre in size.
The company, incorporated in Delaware and led by four Hong Kong real estate magnates, purchased the property from the Jesuit Order of the Catholic Church for $36.5 million in July 2013.
It subsequently demolished the historic house, built in the early 20th century, over sustained protest from local civic and historic preservation groups.
Efforts to stop the demolition and make the house a historic landmark ultimately failed.The planning board also approved an amendment to their rules, extending the notice area 50 feet for any property under their review, allowing homes and businesses within 250 feet of the sites to be notified of public hearings. Kass said this was the same regulation the board of appeals follows.