The database contains information on dangerous events that were registered in the years 2015-2023 in a construction company that was carrying out construction works in Poland. Each event has been described and classified in detail. The data is presented in the form of a two-dimensional table, in which each row corresponds to a single event, described using attributes such as the date of occurrence, a unique description of the event and the assigned classification. The descriptions include the most important circumstances of the event.