This research paper aims to discuss how effective the passive designs adopted in Phases 1 and 2 of Belum Rainforest Resort are at solving heat gain. Passive designs achieve thermal comfort without mechanical systems through factors like orientation, structural roof components, material selection, and ventilation. The resort's remote location necessitated a sustainable design that utilized the surrounding microclimate through techniques like building orientation for shading and airflow, ventilated "safari" roofs, and using tree saplings as façade screens. By investigating these passive design elements, the paper seeks to understand how well the resort achieves thermal comfort in a sustainable way.