Based on the construction methods used, it is estimated to have been built between 1690 and 1720, and is the oldest building on Brookwood Farm. It is currently undergoing a major restoration undertaken by the North Bennet Street School. They have removed the oldest 20-by-20-foot (6.1 m × 6.1 m) section for major work to repair rot and insect damage. It is expected to be returned to the site in 2010 or 2011.[dated info] All of the photographs here are of the portions of the barn built after the original barn.