Buildings consume enormous amount of energy and accounts 40% global carbon emissions. Buildings operated efficiently throughout the lifecycle can have significant energy savings and positive impact on the environment. MEP systems performance need to be monitored and verified against design parameters to enhance performance of overall building. Existing buildings can have great potential to reduce the energy consumption and utility bills cost with the implementation of energy conservation measures such as high-performance building envelopes, LED fixtures, VFD driven pumps, demand control ventilation, upgrading to energy efficient mechanical equipment’s, low flow plumbing fixtures.