William Green settled in Ewing circa 1700, having moved to the area from Newtown, New York, and purchased a 345-acre plot of land in 1712. The William Green House exhibits three distinct periods of construction which are estimated to have occurred around 1730, between 1750 and 1790, and circa 1833. The house is known to have been constructed adjacent to an earlier log cabin, the foundation for which was repurposed during the construction of the 1833 addition and remains intact today, as does the roofline associated with this building which can be observed on the second floor. The Green family retained ownership of the house and property until 1879, and it remained a private residence and farm until its final sale to the State of New Jersey in 1930.

The 2023 Trust grant will help fund the preparation of a Preservation Plan.