In tropical climates, where high temperatures and humidity levels pose challenges to energy efficiency, the adoption of passive design strategies becomes crucial. With the use of qualitative data, this study analysed secondary sources such as experiments and scholarly materials from reputable databases such as Google Scholar, ResearchGate, Scopus and Covenant University Repository. The systematic review of published literatures presented in themes examined how passive design strategies aid energy efficiency for a sustainable built environment in tropical buildings. 70 publications spanning the years of 2002-2024 were content analysed and descriptively presented. The findings showed that proper incorporation of passive design solutions is both advantageous to man and the environment. It further makes for reduced energy consumption in tropical buildings. The study recommended intentional designer responsibility, policy implantation and better innovative solutions.