The form of the building plays a significant role in the amount of heat transferred through its various components. This study investigates the impact of different components of a building form in enhancing the energy efficiency of residential buildings in composite climate. The Energy Conservation Building Code-Residential (ECBC-R) compliance check tool has been used as a quick software mechanism to understand and evaluate the code compliance and further assess the results by manipulating the building form in terms of orientation, construction layers and material specifications. The project information was collected from primary sources through field surveys, photographs, interviews with government officials and procuring architectural drawings. It has been found that buildings of similar dimensions and form with different orientations, construction assemblies, material specifications and different building envelope characteristics produce different results, which in turn affect the building's performance. While comparing the results using Eco-Niwas Samhita: compliance check tool, the building envelope was considered as the principal heat exchange medium of the building form. The study highlights the importance of building form in the design process and out of all the building form factors, the building envelope has the greatest impact, according to the collected data and result analysis.