The “Liaisons Dangereuses” Room (left): The alcove bed had been neon pink; Yohannan restored its Louis XV– style glory. The wall hangings and curtains were achieved with “a staple gun,” he says. “You can change the world with a staple gun and a hot-glue gun.”

The Kitchen (left): “This was a gut. A total fabrication. I did everything,” says Yohannan. The two Renaissance Revival cabinets are from Italy, bought upstate. An old piano became an island work station. There’s a Garland stove and Sub-Zero fridge.