This study evaluated the factors influencing environmental sustainability (ES) performance of construction projects from the perspective of construction industry professionals working in the Free State province in South Africa. Using a quantitative research approach, questionnaires were administered to a sample of purposively selected respondents (N=165) of construction professionals working on designated construction sites. A total of 101 questionnaires were returned and analyzed to ascertain drivers for improved ES performance, strategies for improving ES performance, and the degree of prioritization of the implementation of these strategies within projects. Results indicated a considerably high level of awareness of ES among respondents. Also, client requirements and compliance with ES-related policies were identified as critical drivers of improved ES performance, and the use of sustainable construction methods proved to be the most salient strategy for improving ES performance. However, the implementation of identified strategies for ES performance improvement was not shown to be a priority, pointing to a need for more client-driven implementation as a pivot for improved ES performance on construction projects. This study has important implications for construction stakeholders seeking to improve ES performance in the South African construction industry.
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