Traditional construction methods in the UK have struggled to address the industry’s evolving challenges. In response, there has been a concerted effort to increase the adoption of Offsite Construction (OSC), a factory-based production approach that offers a viable alternative to traditional methods. However, the resurgence of OSC has elicited diverse reactions within and outside the industry. Research highlights the significance of human response as a critical factor in the adoption process. This study, following an extensive literature review, conducted qualitative interviews with twelve UK construction professionals to explore industry and public reactions to OSC and identify the behavioural challenges affecting its broader adoption. The analysis revealed that perception and attitude are major obstacles, although there is a noted willingness within the industry to trial OSC. This study enhances the understanding of these attitudinal issues, offering valuable insights for scholars, practitioners, and policymakers aiming to increase OSC uptake.