The castle was badly damaged during the First World War. In 1939-1953, NKVD detachments and punitive bodies of the German occupation authorities were stationed here at different times. From 1953 to 1988, the school of mechanization medical and labor prophylactics were located here in different years. Since 1988, the castle has been empty for its history. Now it actively continues to be destroyed, and its premises are not used in any way. In 2005, it was leased to Investzhitlobud, a company from Rivne. And promised to revive the castle. In particular, making a hotel. However, nothing was done and a few years later her contract was terminated. The public is outraged by the inaction of the authorities regarding the fact that Klevan Castle is being destroyed more and more every year. Although it can be an important tourist attraction in terms of its potential. This abandoned estate has almost no roof at this time. Through its remains there are now combing their branches with the wind of birch. Due to the fires that remained in the history of the castle, the walls turned black in some places. In addition, they are covered with inscriptions left there by locals and tourists. In some places the ceiling and stairs fell, so it's a bit dangerous there. In addition to the ground part of the castle there is also an underground. It is not known for sure how many floors the ground hides. In the eastern part of the castle you can find an abyss of soil, through which another floor is clearly visible. Still there you can see the stairs that lead underground. Currently, this passage is blocked. It is rumored that it was the entrance to the underground tunnels that connected Klevan Castle with the Church of the Annunciation and Olitsky Castle