The Carriage House was designed in 1876 by Frank Heyling Furness, an acclaimed American architect, and built by a friend of the Fox Family. Some of Furness' other surviving works include the University of Pennsylvania Library, now the Fisher Fine Arts Building and the Pennsylvania Academy of the Fine Arts both in Philadelphia, Pennsylvania.
This impeccably crafted building, which was restored in 2001, is located adjacent to the Mansion and serves the Estate in many ways. The basement of this building is considered to be the electrical center for the main compound, complete with generator. The first floor functions as carriage room. While the second floor of this remarkable structure serves as a guest home; featuring a master suite, great room, gourmet kitchen and dining room.