Built in 1896-1898, the carriage house and stables served the estate of Kimball Chase-Atwood and later the Elmer Blauvelt family. Designed by the prominent architect Fred W. Wentworth, the buildings, like the mansion, are shingle-style architecture, with a cedar facade and a complex cross-gable roof. Features include a pyramidal-roof tower and cupola, with oversized doors on the south side. The historically restored carriage house retains much of the original interior wood and iron work and is now used as the entrance and display area of the Blauvelt Art Museum. The museum was established in the 1950s by Hiram Blauvelt, the son of Elmer and Margaret, with a collection that included trophies from hunting trips on three continents. In 1979, Blauvelt's first cousin, James Latimer Bellis, Sr., expanded the collection to include wildlife artworks and remodeled the stable area to create three large galleries. The internationally known Blauvelt Art Museum is owned and operated by the Bellis, Blauvelt-Demarest Foundations, Inc.