The meetinghouse, a plain two and one-half story frame building, was built in 1786. Previously thought to have been built in 1761, disassembled in 1785, and moved to this location, the meetinghouse is now thought to have been built using some of the structure from an earlier building.[4][5] It was built by the Mount Bethel Baptist congregation, which had been established in 1767 from the Scotch Plains Baptist Church. This congregation was the first in Somerset County. In 1960, it dedicated a new church building and abandoned this one.[3][6]