<p>Although the circular economy (CE) has gained attention across sectors, its adoption in construction remains limited, particularly in developing contexts. This study identifies the critical barrier factors (CBFs) affecting circular construction (CC) adoption from the perspective of architects in Türkiye and develops a strategic roadmap to support a systematic transition. An initial set of 64 barriers was identified through a systematic literature review (SLR). Data collected from 208 architects were analysed using exploratory factor analysis (EFA), confirmatory factor analysis (CFA), and fuzzy synthetic evaluation (FSE). The results revealed 59 critical barriers grouped into six factors related to: (1) lack of awareness and technological constraints (LATC); (2) governance constraints and institutionalization gaps (GCIG); (3) knowledge, skills, and capacity gaps (KSCG); (4) strategic planning and market constraints (SPMC); (5) perceived risk and cultural resistance (PRCR); and (6) economic uncertainty and cost barriers (EUCB). Among these, KSCG was the most influential, while GCIG was comparatively less dominant. Based on the relative importance and impact of these factors, a phased roadmap was developed to define short-, medium-, and long-term priorities for adaptation. By integrating multivariate statistical techniques with fuzzy logic–based evaluation, the study validates the structural dimensions of CC barriers and translates them into an operational transition strategy. The proposed framework offers a scalable model for developing economies.</p>