Purpose – The damage humans caused to the environment post the industrial revolution fostered developing sustainability-rating systems – a number of evaluation instruments that focus on various factors to evaluate buildings and small-scale urban developments. Nevertheless, no buildings are certified in Bahrain, the environmentally challenged country in the Arabian Gulf. The paper aims to discuss these issues. Design/methodology/approach – This study assesses 11 sustainability-rating systems: LEED, Green Globes, BREEAM, DGNB, SBTool, WELL, CASBEE, Green Star, HQE, GSAS and the Pearl Rating System (PRS). These were selected because of their international applicability, popularity and importance. The study adopts a system of criteria using a comparative review and cross-comparisons to draw conclusions on the compliance of the selected systems to the Bahraini context and assesses the need and importance of a customised sustainability-rating tool. Findings – The study concluded that LEED is the most comprehensive, international and versatile sustainability-rating system. It is also the most popular. Nevertheless, the PRS is the most relevant to the Bahraini context and is the easiest to access. Originality/value – This paper provides a deep understanding of sustainability-rating tools and introduces a methodology of comparison that can be used as a reference when choosing between tools. © Emerald Publishing Limited

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