The castle comprises a medieval tower house, which was extended over the years, and remodelled in the Scots Baronial style by David Bryce in the 1860s.
[3] The original three-storey tower house is located at the south-west of the present building, and was constructed in the 15th century, or possibly earlier.
In the 1860s the Somervell family owned the castle, and commissioned David Bryce to remodel the building.
Sorn Castle was bought in 1908 by Thomas W. McIntyre, who commissioned a new entrance from architect Henry Edward Clifford and carried out internal remodelling.
[1] In September 1598 the wedding of Ludovic Stewart, 2nd Duke of Lennox and Jean Campbell, a great-granddaughter of James IV of Scotland, was celebrated with a banquet at Sorn attended by James VI, who stayed two nights.