9 Mansion Hill Dr Muttontown, NY, 11791 Stone Hill At Muttontown Custom Home 2016 Completion. Renowned Builder Modern Architectural Design And European Appointments Such As Leicht Cabinets, Duravit Wall Hung Commodes, Dornbacht Faucets, Toto Baths And More! D & D Design With Outstanding Lavish Sophistication. 3 Stop Elevator. Premier Culdesac. Breathtaking Specimen Treed Property And Vistas. See Feature List .