What is the address of the Sheffield house on The Nanny?

The address of the Sheffield house on "The Nanny" is 555 Park Avenue, New York City. This fictional address serves as the home of the Sheffield family, where Fran Fine, played by Fran Drescher, becomes the nanny for the children. The show often highlights the luxurious setting of the Upper East Side in Manhattan, reflecting the affluent lifestyle of the Sheffield family.