This study developed and tested a model, which involves the effects of work–family conflicts on job satisfaction and job performance of construction professionals, with a focus on the mediating role of affective organizational commitment. A structured questionnaire survey was conducted among construction professionals in China, resulting in 317 valid responses. The results, generated from structural equation modelling, revealed two interrelated dimensions of work-family conflicts, work’s interfering with family life and family life’s interfering with work. We found these two types of work-family conflicts directly, negatively affected affective organizational commitments and job satisfaction but not job performance. Additionally, affective organizational commitment positively affected job satisfaction and job performance, and mediated the effects of work–family conflicts on job satisfaction. This study advances our understanding of how or why work–family conflicts produce dysfunctional effects on employees’ job outcomes in the context of construction projects.