Abstract
Egypt faces a major problem out of the abundance in in the inherited buildings, that causes great loss of historic values. The author focusses on identifying the preservation needs for reconciling energy efficiency, achieving the new function in its best performance. The research goal is to retrieve the heritage by managing the optimal change occurred as a sustainable landmark. The research consists of three parts; the first part contains the introduction, recognition of a preservation methods. Second part is the theoretical part that discuss the preservation of inherited buildings. Third part shows the operation methods for sustainable reusing by design builder assessment tool, for being sufficient in addressing the Egyptian heritage according to NOUH principles, to upgrade the indoor environmental quality and upgrade the energy performance. The paper suggests different interventions internally, and externally within minimal additions, by applying transparent solar panels inside the inherited Empain Baron museum.