The article deals with the evaluation of the extent and causes of damage of three selected buildings in Spolana Neratovice a.s. The buildings were affected by the flood in June 2013. Specifically, it is a reservoir, a base under the production line and an ammonium sulphate storage. The reservoir is used to catch any drips and chemical containers. The ground dimension of the reservoir is approx. 26 x 40 m. Due to the flood, the reinforced layer of the coating was damaged and thus the leakage was lost, which depreciates the trapping function. The base is under technological units at ammonium sulphate storage. The total area is about 25 x 50 m. Ammonium sulphate storage is a detached object used to store freely deposited ammonium sulphate. The ground dimension of the building is about 126 x 23 m, the height at the roof top is about 13 m. The article presents the state of individual objects during the inspection after flood, when extensive disruption of objects, especially reinforcement corrosion, and fallen parts of concrete were detected. The article describes the assessment of damage extent and it suggests a repair.