Castle Hill House Including Garden Wall

Castle Hill House, built around 1820, is a large house set back in a garden and accessed from South Street. It features a hipped slate roof and is two stories high with four sash windows, complete with glazing bars, on the garden front. The house has a cornice and a parapet. At the south end of the garden, a stone wall adjoins a public walk that overlooks the valley and is designed in the same style as the Town Mills, likely from the mid-19th century.

In the center of the wall, there is a projecting tower with a pointed door opening and sunk rectangular and circular panels above. The walls on either side of the tower have sunk cruciform panels and castellated parapets. Behind the wall, there is a vaulted outhouse and a flight of steps leading down to the garden level. The design of the walls may have been influenced by the nearby Castle site, adding visual interest to the public walk and enhancing views of the town from this side.

All the listed buildings along South Street are part of a group.