Background Occupational skin diseases are among the most common work-related illnesses in construction workers due to exposure to cement, chemicals, dust, and prolonged wet work. Contact dermatitis caused by cement and chromium compounds is a major occupational hazard in construction workers. Objective To estimate the prevalence of work-related skin diseases and associated socio-demographic risk factors among construction workers admitted to a tertiary care centre in Saharsa, Bihar. Methodology: A hospital-based cross-sectional study was conducted among 112 construction workers admitted or attending dermatology OPD/IPD of a tertiary care centre in Saharsa, Bihar. Participants were selected by systematic random sampling. Data were collected using structured questionnaires and dermatological examination. Results: Out of 112 workers, 52 (46.4%) had work-related skin diseases. The most common conditions were contact dermatitis (19.6%), fungal infection (13.4%), and callosities (8.9%). Male workers, rural residents, and low socioeconomic groups had higher prevalence. Urban residence showed lower odds of skin disease (OR=0.5). Conclusion Work-related skin diseases are highly prevalent among construction workers in Saharsa. Preventive measures such as protective gloves, health education, and regular health screening are recommended.