The designer recently bought a Frank Lloyd Wright-designed home outside of the city.
The Upper East Side town house was sold in January for $18 million to a mystery buyer.
Her parents just put it on the market for 1.95 million pounds.
This one is a Dutch gambrel in Sag Harbor, asking $5.95 million.
It also counts Yves Saint Laurent, Pierre Bergé and Giancarlo Giammetti among its former occupants.
Gilles Mendel is seeking $2.2 million for the one-bedroom pad that he has owned since 2011.