Little remains of the castle: only a length of the south wall with the springing of at least three walls on its north face, and the remains of an entrance gateway lying 50 metres (160 ft) to the north. The gateway dates from the 17th century, and are described as a good example of Renaissance work.
The gate piers are registered as a Category A Listed Building.
It is said that the ghost of Janet Dalrymple of Carscreugh haunts the ruin, in a bloodied wedding dress. Janet was forced to marry Sir David Dunbar of Carscreugh Castle although she had fallen in love with another man, the impoverished Archibald 3rd Lord Rutherfurd. She either was murdered on her wedding night or died insane shortly afterward.
- Coventry, Martin (2001). The Castles of Scotland. Musselburgh: Goblinshead. p. 65 ISBN 1-899874-26-7
- "Baldoon Castle". Royal Commission on the Ancient and Historical Monuments of Scotland. Retrieved 26 August 2016.
- "Baldoon Castle Gate Piers". British Listed Buildings. Retrieved 23 August 2016.
- The Douglas Archives The Douglas Archives