Ranfurly Castle

Ranfurly Castle stands as the remains of a 15th-century keep on the Ranfurly golf course, about 0.8 kilometres south-west of Bridge of Weir in Renfrewshire. Built around 1440 by the Knox family, it later passed to the Earl of Dundonald in 1665 and then to the Aitkenheads. The castle was a small square keep with a courtyard, though only two storeys and three cellars survive today. Arrowslits line the ground-floor walls, and the main entrance was originally at first-floor level. The structure shows clear signs of later additions, including an east wing added about two centuries after the original build. A south wing provided storage and cattle vaults on the ground floor, with family rooms above, though its date remains unknown. The keep measured roughly six metres square and stands to about seven metres tall, its walls made of rough rubble with dressed-stone quoins. Inside, a doorway and a slit window with a wide internal splay can still be seen. Visitors today find a quiet ruin set within the golf course, where only fragments of the castle’s past grandeur remain. The surviving walls and cellars hint at the building’s original layout, while the east wing offers a glimpse of later modifications. The arrowslits and entrance position reflect the castle’s defensive purpose, and the dressed-stone details stand out against the rough rubble. The site is small but evocative, a reminder of the Knox family’s influence and the castle’s later owners.