In 1918, Bannerman passed away. Misfortune befell the castle soon thereafter. In 1920, a large ammunition explosion destroyed a portion of the complex. In 1969, a fire destroyed more of the building. In 2009, approximately thirty percent of the castle’s front wall collapsed. Today, the ruins of Bannerman Castle are officially off-limits to the public, though guided hardhat tours are available through the Bannerman Castle Trust.