The farmhouse at Pen y Castell Uchaf, set within the ramparts of Castell Caeron, comprises a three roof bay main building with a former byre to the north east.
The current structure, dating to the late 18th century or early 19th century, is thought to be formerly associated with the nearby farmhouse of Pen y Castell Isaf (both lie adjacent to a complex of regular small semi-improved fields of probable late 18th or 19th century date, bounded by dry stone walls). The farms probably formed part of a larger property in former times.
A track way which passed the cottage to the south west would probably have allowed access to a rear yard. It is proposed that the truncation of the ramparts of Castell Caeron was probably carried out at this time, in order to provide a relatively level rear yard. The rear yard area was altered as part of the kitchen extension building work in the 1980s, and the south western perimeter scarified. The dry stone walls which bounded the yard and trackway were also somewhat truncated at this time.
Source: Gwynedd Archaeological Trust Report No. 852 [see GAT10/04/13].
L. Moore, RCAHMW, 17th July 2012