In this paper, a case study regarding utilization of solar energy in Raj Bhawan and Bijulee Bhawan in Guwahati is presented. Solar photovoltaic (PV) system is used to harness solar energy in both the sites. A comparative analysis of the reduced energy consumption after commissioning the grid-interactive solar plant in Raj Bhawan is presented along with an overview of the off-grid solar plant in Bijulee Bhawan.