In the context of India's growing commercial building sector and its impact on the environment, this study focuses on assessing system design parameters that contribute to the optimal energy performance of a green Information Technology (IT) building. Specifically, the research aims to enhance energy efficiency in the Bihar Museum through the utilization of energy modeling techniques. The findings of this investigation provide valuable insights to decision-makers, enabling them to create more effective designs for energy-efficient buildings and contribute to environmental preservation by conserving natural resources. The methodology involves identifying energy optimization factors and options, generating and evaluating scenarios, and applying the optimal scenario to the design process. The outcomes of energy simulations demonstrate significant energy savings of 16.8% compared to baseline design standards. Actual energy consumption data from the operational "Ramanujan IT City" campus, a LEED-GOLD rated facility covering 3.4 million sq.ft., further confirms the achieved energy savings. The study deepens understanding of various design parameters, such as HVAC systems and lighting, leading to the development of an optimal energyefficient design. As a result, the campus experiences advantages such as reduced operational costs, decreased reliance on natural resources, lowered emissions, water recycling and reuse, and improved indoor air quality