Green Building Assessment Systems in South Africa: Key Indicators and Implementation Barriers

Green Building Assessment Systems (GBAS) serve as standardised tools for evaluating environmental performance and promoting sustainability in the construction industry. In South Africa, the urgency for sustainable building practices is heightened by escalating energy demands, water scarcity, and climate change challenges. Despite increasing awareness, the adoption of GBAS remains limited and inconsistent. This study investigates the key indicators employed in GBAS and examines the barriers to their effective implementation within the South African context. A structured questionnaire, informed by existing literature, was administered to construction professionals in Gauteng Province. Sixty valid responses were analysed using Mean Item Score, Standard Deviation, and One-Sample T-test. The reliability of the research instrument was confirmed with a Cronbach’s alpha of 0.924, indicating strong internal consistency. Findings indicate that energy efficiency, carbon emission reduction, and water efficiency are the most critical indicators in current green building evaluations. These reflect the growing prioritisation of resource optimisation and environmental responsibility. Also, the study identifies significant barriers of GBAS to include high investment costs, policy enforcement gaps, government support deficiencies, and implementation uncertainties. These challenges highlight the disconnect between awareness and practice, suggesting that adoption is hindered by financial, institutional, and technical constraints. The study recommends the introduction of strong policy frameworks, financial incentives, and capacity-building initiatives to enhance the effective adoption of green building assessment systems in South Africa. By identifying key indicators and barriers, this research contributes valuable insights for policymakers and industry practitioners aiming to enhance sustainable construction practices in South Africa.