The Headquarters House Museum is the headquarters of the Washington County Historical Society. It was built by Judge Jonas Tebbetts and wife, Matilda Winlock Tebbetts, in 1853.The structure, serving as an example for Greek revival architecture, contains fluted columns on its front porch as well as dentil trim on its eaves and parlor fireplace. Within the 4-acre property, several buildings also stand together with the apple orchard that is located behind the house.

The house obtained some serious damage from the Action at Fayetville but it was restored to its former glory with the help of its series of owners after the Civil War.

The headquarters was passed on to the Washington County Historical Society in 1967 so that the organization can operate it as a house museum. Today, it houses certain period pieces and artifacts that can be seen on the present exhibits.