The DuBois house stands on a Native American shell mound, or midden, 20 feet high and originally 600 feet long. It is now only 90 feet in length. A midden is technically a trash heap, built up over hundreds of years. Eventually such heaps became mounds and provided an elevated place for a chief's house or a religious sanctuary. The oyster and other shells that compose the mound are especially visible under the steps leading up to the house.
Built in 1898, this house is the 2nd oldest extant house in Palm Beach County.