Barn Approximately 33 Metres South South East of Verulamium Museum (Not Included)

This barn, located approximately 33 meters south-southeast of Verulamium Museum, dates from the mid-18th century. It features 20th-century weatherboarding over a timber frame set on a brick plinth, topped with a gabled roof covered in plain tiles from the mid-18th to mid-19th century. The barn has a six-bay plan, with a threshing floor situated in the second bay from the right. A gabled porch is located at the front, with an outshut to the right. The porch has 20th-century windows inserted into its double doors, and there are also 20th-century double doors at the rear.

Inside, the timber framing is divided by a middle rail set between the wall posts, creating two panels per bay length, with diagonal bracing from post to rail. Some mid-19th-century machine-sawn timbers are included among the timber-framed studding of the walls. The unjowled posts with diagonal bracing support the six-bay common-rafter roof, which features split oak rafters. Each truss has an upper collar and angled struts connecting the tie beam to clasped purlins, with windbraces in the end bays and the threshing floor bay. The outshut to the right of the porch likely served as a storage area for implements and retains some 18th-century weatherboarding with lapped joints. The partition to the left of the threshing floor is made of mid-19th-century machine-sawn timbers but likely occupies the position of an original partition.

Historically, the barn was situated on the east side of the foldyard of St Germain's Farm, which has been documented since the 16th century. A map from 1766 indicates that a building existed on the site of the barn.