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The study's focus was to identify the primary causes of construction waste and the most effective methods for reducing them. In the collaborative action research methodology, a questionnaire was used as a tool. Data from 109 participants were analysed statistically using multiple regressions and descriptive statistics (percentage, mean, and t-test). Responses were collected by various stakeholders from the construction industry having different expertise, and work experience and spread across pan India. The primary causes of construction waste have been identified during material ordering, transit damage, negligent frame of mind of the working team, wrong work methodologies and improper work planning. Preparation of an appropriate waste management plan at the start and periodic review of same by senior management, use of building certification methods, correct handing and return of leftover material from the site, the trained workforce at the site and proper work methodologies are seen as being the most effective waste reduction techniques. Multiple regressions revealed that respondent work roles, experience, and type of project were substantial positive factors that influence reducing waste management at the project site. However, both the causes and solutions of construction waste were found to be human-related. Awareness of these factors must be imparted to stakeholders, which can motivate and inspire effective waste management in the construction industry.