Update: This house has a whole history written by the late Carol J. Peterson (PDF), so old Pa Pitt has more information now. The house was built between 1872 and 1877; it was built as a double house, and divided into six apartments by 1910. The article as originally written follows.
Father Pitt does not know the whole history of this building. It was probably built in the 1870s, though a change of outlines on the map between 1882 and 1890 may indicate that it was enlarged then. It appears as a double house on the old maps, though always under single ownership, so perhaps the single entrance is newer, from the time it was converted to apartments. It is certainly a grand example of the Italianate manner.