The Gatehouse at Aberglasney is thought to have been built in the early 17th century. It is a 2-storey gatehouse of rubble stone. The front has a freestone round arch. The side walls have stub walls and the gables of former lower single-storey wings. The rear has an arch similar to the front, but plain and with cut voussoirs. Above the gateway is a camber-headed first-floor doorway. The passage is tunnel-vaulted and has a cobbled floor.

Reference: Cadw listed buildings database.
RCAHMW 2009.