The Cow Barn, Approximately 70 Metres East of Lambourne Hall

The Cow Barn, located approximately 70 metres east of Lambourne Hall, is a barn dating from the late 16th century that was converted into a house in 1983. The structure is timber framed and weatherboarded, with some sections of red brick laid in stretcher bond, and it is roofed with handmade red clay tiles. The barn consists of five bays aligned roughly north-south, featuring a midstrey to the east of the central bay. There is a single-storey lean-to extension in the southeast corner, constructed of red brick in stretcher bond and roofed with 20th-century red clay Roman tiles, added in 1983. An external chimney stack was also added at the north end during this conversion.

The west side has large windows that were installed in 1983. Internally, the timber frame is partly exposed, showcasing heavy studding, primary straight tension braces combined with arched braces to the wallplates, which is an unusual structural feature. The wallplates exhibit edge-halved and bridled scarfs, while the jowled posts and arched braces to the straight tiebeams are complemented by inclined queen posts shaped with a decorative jowled profile at the tops, a rare characteristic. The roof features clasped purlins with straight wind bracing.

Extra posts on the west side of the middle bay suggest that there were originally large double doors here, which have since been infilled and weatherboarded. Empty mortices on the east side indicate that the midstrey was added after the initial construction. During the conversion to a house, which was nearing completion in July 1983, the two southern bays were divided into two storeys, the middle bay was left open to the roof, and the two northern bays were ceiled at first floor level, without access to the upper floor.