An H-bent frame Dutch barn, dating from the 1760s, was acquired from the Nilsen family in 1997, moved from Johnstown, N.Y., restored, and re-installed at the Mabee Farm Historic Site.

[3] George Franchere, the last descendant of that particular Mabee line to own the House and property, donated the site to the Schenectady County Historical Society in 1993, with the intention that it would be maintained as a museum and educational center.

The Jan Mabee and Anna Borsboom House, Brick building, and Inn, on the 9 acres (36,000 m2) of property in Rotterdam Junction, NY were given to the Schenectady County Historical Society by George E. Franchere in 1993, 11 years before he died.

[5] In addition to the west part of the House, which dendrochronology done at Cornell University dates to approximately 1705, making it the oldest known unaltered structure standing in the Mohawk Valley, the site now contains the 1760s Nilsen Dutch Barn, a smaller English barn, and several small outbuildings.

The site borders the south side of Mohawk River (now also the New York State Barge Canal), and the Farm's dock serves as the home base for two bateaux, the De Sager and the Bobbie G, specially constructed by the Alplaus Maritime Academy for the Mabee Farm.