Hen Wych barn and earlier walled produce gardens were probably erected in the C18 to serve the house, the predecessor of Gwrych Castle and the ancient seat of the Lloyd family. Following its replacement as the seat by the newly-erected castle c1819, Hen Wrych was adapted as a home farm complex; the agricultural range, castellated rubble and further brick garden walls relate to this period and were added variously from the second-quarter to the late C19.
It is a large rubble barn with semi-ruinous slate roof and stone-coped and kneelered gable parapets. The interior of the barn has five bays with pegged oak king post trusses, a stone-flagged threshing floor and later C19 plank-boarded partitioning.

Source:- Cadw listed buildings (NJR 14/11/2007)