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With industrialization, the building industry has positioned itself as one of the main activities that promote the economic growth of the country; due to the characteristics of the work processes in this sector, they present higher occupational risks; that is why our main objective was to identify the occupational risks in the housing building processes to mitigate the risks and prevent accidents-morbidity. The method used was a descriptive, cross-sectional, non-experimental study. The population and the sample comprised 25 workers from a single-family housing building project. William T. Fine's mathematical method was used to assess and analyze occupational risks in workers through the observation of work processes and their environment. For the identification and assessment of risks, Fine's method was used, where high risk ?200 was obtained in the classification of ergonomics, physical, and, finally, chemical hazards. The results of the prioritization of the risks are related to the degree of danger, showing ergonomics, and physical and chemical hazards, in a range of ? 400, as very high risks that require immediate adjustment. The main occupational risks in the building sector that require rapid intervention due to their degree of danger are the ergonomic, physical and chemical risks, so a safety, health, and occupational hygiene plan was suggested as a preventive approach.