Historic New England founder William Sumner Appleton purchased Boardman House in 1914 because he recognized its remarkable state of preservation and the extraordinary amount of surviving seventeenth-century building fabric. Original oak clapboards, roof boards and skirt boards, massive timber framing with decorative chamfers, shadow-molded sheathing, and wooden ceilings that were never plastered are among the important features still on view.
Dendrochronology research conducted at the Boardman House in the winter of 2008 has given additional insight into the life of the house. By 1696, a rear lean-to had been added, accommodating a new kitchen, milk room, and kitchen chamber. This addition of new service space freed the hall from its former use as the family's general cooking, eating, and gathering room, and transformed it into a “best room” to complement the parlor. The separation of work spaces and social spaces illustrates an important cultural shift in domestic architecture that was taking place at the turn of the century.