This paper proposes a multidimensional model to evaluate citizen engagement in the use of recycled construction materials, integrating individual, institutional, social, and technological dimensions. Drawing from existing literature and enhanced measurement indicators, the study synthesizes behavioural, attitudinal, and systemic factors contributing to sustainable material adoption. Findings suggest that participatory processes, policy coherence, and technological advancements significantly affect recycling efficacy. The proposed Enhanced Citizen Engagement Model aligns with EU circular economy goals and offers actionable metrics for academic and policy evaluation.