According to the real estate listing:
"This one story 5050 square foot home, rich with character, features original parquet floors, his and her dressing rooms, multiple fireplaces, a formal dining, built-in cabinets and bookcases, nine foot ceilings and alternate power generators. The surroundings include natural stone landscaping, flagstone pool deck with an outdoor cooking area, vine covered trellises, stone patio and a tennis court. The basement space under the house conceals equipment and utilities. This equestrian property has stables for horses that include water, electrical, storage for hay and two separate living areas. There is also a separate three car garage with bath and second floor studio/office exists as well. The property still contains an underground bunker and dependencies used by Secret Service personnel.
The house now sits on 165 acres. When the Kennedy's owned it the house sat on 40 or so acres. Jackie sold the property in 1964 for $225,000.
You can see the real estate listing here: http://atokaproperties.com/listing/the-kennedy-family-estate/