Abstract: There can be no occupational health and safety without mental health. Through a thorough literature review and questionnaire survey of 152 workers in the Nigerian Construction Industry (NCI), this study investigates the impact of wellbeing culture and mental health among construction professionals in Nigeria. Our findings reveal Decrease in job satisfaction and Reduction in Productivity respectively are the highest impacts of poor wellbeing culture and mental health of construction workers in Nigeria. Furthermore, Enforcement of regulations that prioritize mental health considerations in urban planning and development and Regular training and education programs should be implemented to raise awareness will help to improve wellbeing culture and mental health among construction workers in Nigeria. Hence, there is a need for regular awareness workshops and training, policies supporting work-life balance, and accessible counselling services to promote mental health and wellbeing in the Nigerian Construction Industry.

Keywords: Wellbeing Culture, Mental Health, Construction, Engineering, Nigeria.

| DOI: 10.17148/IARJSET.2025.12501