Now the focus of society is the saving of energy with the ultimate aim of protecting the environment, which is in a critical energy situation. Upgrading houses has a critical role in saving energy, since it is of decisive importance. Stone-built buildings exist in every corner of Greece and are an element of cultural and social heritage. Due to their age, they need large percentages of energy consumption and for this reason, research and study for an energy upgrade, based on social and environmental criteria is necessary.

The specific research investigates the energy upgrade of a traditional mansion building into a building with almost zero energy consumption in the Milies area of Pelion. Seven energy upgrade scenarios are considered, focusing on the building shell, electromechanical systems, RES applications and combinations of all of them. The legislation of the area has an important role in the study as it is specific to the external form of the buildings. The preservation of the architectural heritage as well as the preservation in combination with the renewal of the building bridges the traditional architecture with the energy needs of today.

The combination of scenarios helps to practically assess the ease with which a building can be upgraded. There are data on energy consumption, carbon dioxide emissions and annual energy requirements. It has been taken in every scenario to leave the external environment and the morphology of the listed building unbroken.