Major share of the energy generated in Oman is still mainly depended on non-renewable energy sources, such as fossil fuel. As per the estimations made, the fossil fuel resources will be depleted by within coming years, if it is used at the current rate. At this juncture, it is inevitable that every building, globally, generates its own renewable energy that they require and, if possible, feed the excess electrical energy produced to the grid. Here comes the importance of Zero Energy Buildings (ZEBs) and Near Zero Energy Buildings (NZEBs). Oman, being a warmer country with an average global solar irradiation of 5.56 kWh/m2/day and an average wind speed of 6.58 knots, solar and wind are the primary resources that can be yoked. Solar & wind power plants are started and they are following the Grid Code Operations from 2020. Poor performance of buildings external enclosure, usage of traditional building materials for …