Energy demand has been increasing worldwide and the building sector represents a large percentage  of global Energy consumption. This is directly related to increasing global warming.
In Egypt, electricity consumption is increasing rapidly due to the rapid population growth, urbanization, economical development and increase in comfort levels.  To solve the Energy problems, efforts need to be concentrated on the supply side, and the demand side as well. Energy efficiency is becoming an integral and important part of solving the Energy problem at the demand side. On the other hand, Renewable Energy technologies are promising as a solution at the supply side. Thus there is a need for integrated, adaptive, approach to reach the optimal combination of applying energy efficiency measures and Renewable Energy sources.
In this paper the energy related policies of Egypt have been presented. The present status of renewable energy utilization in Egypt has been discussed  as well.  The research introduces and examines the effect of combining Energy Efficiency measures with photovoltaic rooftop application  in an air-conditioned office building in Egypt. Annual  Energy reductions and Annual energy production due to the PV roof top installation was calculated by means of Energy Plus, a reliable Energy simulation software.The energy requirements for cooling, and lighting was evaluated as well.
It was proven that Reductions in Annual Energy Consumption  reached about 48 % due to applying Energy Effeciency measures.The Annual electricity production due  to the installation of     900 m2 PV Panels on the building roof coverd about 40% from the building Energy consumption. This demonstrates that it is technically possible to meet more than 60% reductions in building Energy consumption with the proper combination between Energy Efficiency measures and RE sources.