Passive design and cooling strategies were studied to reduce energy consumption and heat gain at PJ Trade Centre in Petaling Jaya, Malaysia. The building aims to be environmentally friendly and energy efficient by minimizing air conditioning use. Interviews and literature reviews were conducted to validate the research. Traditional Malay house designs were also examined as examples of vernacular architecture adapted to the hot, humid climate. Energy reduction was achieved through natural ventilation, while heat gain was minimized through orientation, massing, green elements, and a double facade. Both buildings effectively utilized passive design strategies that respond to the local climate and site conditions.