Bardowie was the property of the Galbraith family from 1214, and passed by marriage to John Hamilton of Cadzow in the later 14th century. The tower was built in 1566, with additions made from the late 17th or early 18th century. The later part of the castle is dated 1713. In the mid 18th century the castle passed by marriage to Thomas Buchanan of Spittal-Leny, whose descendents owned the castle until the early 20th century. Thomas' son Dr. Francis Buchanan-Hamilton claimed the chiefship of Clan Buchanan. In his 1854 Rambles Round Glasgow, Hugh Macdonald wrote that Bardowie Castle was "an edifice of moderate size, somewhat timeworn, yet withal wearing an appearance of quiet cosiness and comfort". The castle was sold several times in the 20th century, including in 1912 and 1951. In the 1990s it was modernised by "motivational guru" Jack Black, who put the property up for sale in 2002. The castle is a category A listed building.
- Peter McGowan Associates (2006). "Survey of Historic Gardens and Designed Landscapes in East Dunbartonshire". East Dunbartonshire Council. pp. 39–43.
- "Bardowie Castle. LB5726". Historic Environment Scotland. Retrieved 28 March 2017.
- Buchanan-Hamilton, Francis (1826). Claim of Dr Francis Hamilton Buchanan of Spittal. Edinburgh: James Clarke & Co. p. 1.
- Macdonald, Hugh (1854). Rambles Round Glasgow. Glasgow: Thomas Murray. p. 361.
- "Bardowie Castle put on the market". The Scotsman. 1 March 2002.