usc In light of the lack of interest in implementing waste management in developing countries such as Iran; exploring the barriers to waste management implementation becomes relevant as the driving force behind conducting the present study. Major barriers identified in previous studies, were selected through a review of literature. Afterwards, a questionnaire survey was administered among different categories of Iranian construction contractors and 101 duly completed questionnaires were received. Ranking of 15 barriers through statistical analysis revealed the absence of a systematic regulatory regime for Construction and Demolition (C&D) waste management for construction projects. Among other findings, a lack of attention to waste management in regulations; lack of necessary skills and knowledge among construction practitioners; lack of economically viable methods for managing waste; and lack of attention to waste management within the dominant culture of the community were identified as the most five important barriers to C&D waste management in Iran. This was perceived by Iranian contractors giving a clear message that the scant attention paid to C&D waste management by policy makers has resulted in a lack of cooperation from involved parties and stakeholders on construction projects. The present study contributes to the field by highlighting the barriers to waste management implementation in a developing country and offering remedial solutions to identified barriers. The findings establish the field by providing a basis for future investigations and offers assistance in promoting C&D waste management in developing countries.