The Weaver House is the oldest extant house in East Greenwich and one of the few remaining seventeenth-century buildings in the state. In the 1930s, analysis of its complex history by Rhode Island's preeminent restoration architect, Norman M. Isham, identified four separate phases of construction, all probably completed by approximately 1750. A drawing by Isham shows how the house, which originally comprised a great room with upstairs bedroom on the south side of the chimney and a lean-to kitchen to the north, was expanded successively above the kitchen, then by a row of rooms in a saltbox extension to the rear, and finally by a new kitchen in an ell to the south. The simple interior includes large stone and brick fireplaces and an unusual pair of staircases in front of the main chimney, straight runs of seven steps on the south and eight steps on the north, which meet at a wedge-shaped landing and rise separately to the north and south garret chambers.