ABSTRACT With rising living standards and a growing global population, the energy consumption of buildings is predicted to soar. Energy efficiency and occupant comfort may both be enhanced by constructing buildings with climate-sensitive design principles in mind. The traditional architectural style of a given region, known as vernacular architecture, has changed throughout the years to accommodate the local climate. One example of a vernacular style of building that made use of climate-responsive design to produce energy-efficient and aesthetically pleasing structures is the Wada style, which is located in the Pune region of India. The performance of the traditional Wada House envelope and its thermal characteristics are being researched in this study. This study investigates the thermal performance of traditional Wada houses, utilizing simulation models, validation, and analyzing climate change scenarios for 2050 and 2080. Research shows that passive design principles are widely used in Wada architecture to control inside temperatures and cut down on energy usage. Insulation through thick walls and roofs, orientation to reduce solar heat gain, and natural ventilation are all part of these measures.