Brondanw Tower is a folly tower built c.1920 by Sir Clough Williams-Ellis, architect, owner of the Brondanw estate. An inscribed slate tablet above its entrance records: 'This outlook tower was subscribed for as a wedding present to Clough Williams-Ellis and his bride Amabel Strachey in 1915 by his brother officers of the Welsh Guards. In the second World War it was prepared as a local military strongpoint to repel the expected German invasion.'

It is a 3-storey battlemented drum tower with adjoining 'ruined' wall, and terminating in a 'ruined' cylindrical tower to the west. Built of local rubble construction on rock foundations, the tower is approximately 11m high and is D-shaped above the basement storey, with its flat side facing in the direction of Plas Brondanw. Each storey has large rectangular slit-lightsand there is a pointed-arched entrance to the basement storey with an oval slate dedication plaque above. The flat roof is parapeted and forms a small balcony accessible via an arched doorway from the upper floor. There are crenellated battlements with a corbel course in Welsh medieval style.

The adjoining wall runs westwards for some 12m at an avarage height of 2.5m. In the centre is an open round-arched entrance with an inner arch of rendered brick. The wall ends in a fragmented round tower, at its highest approximately 6m.

Reference: Cadw listed buildings database.
RCAHMW, 2010.