Construction industries are bulk generators of waste globally, improper management lead to environmental catastrophe. This article identifies the significant factors through exploratory factor analysis and presents a novel approach to determine, causal relationships of various factors which lead to waste generation at construction sites by structural equation modeling (SEM). The analysis demonstrates maintaining& managing site waste management plan (SMP) is identified as top factor with a path coefficient of 0.96. The impact on waste generation, of other factors, such as Operations (0.91), Ordering &Purchasing Stage (0.84), Hauling &Handling Stage (0.76), Material Handling Stage (0.73), Documentation (0.60), and Culture (0.46) are quantified. Appropriate documentation provides the... framework for SMP on which basis other mitigation measures may be enforced thus reinforcing analysis results of SMP variables. Standardized documentation procedures for SMP need to be initiated &incentivized within existing green building performance rating frameworks such as GRIHA and LEED-India.