A collection of walls and buildings define an irregular polygon approximately 28m from north to south by 23m at Penhow Castle. The enclosure is at the northern end of a north to south ridge and is ditched around the south. The earliest structure is a much altered twelfth to thirteenth century tower, whilst a three storey house and hall block is thought to be an early seventeenth century structure remodelled caround 1700.

An outer enclosure, approximatley 70m from east to west and 55m from north to south, has been partly traced on the south apparently enclosing the church (NPRN 307369). Garden features south-west of the castle are thought to be seventeeth to eighteenth century and later.

source: Wrathmell 1990 (Monmouth. Antiquary 6), 17-45

J.Wiles, RCAHMW, 6 May 2004