This paper explores the possibilities of energy saving interventions in mountainous settlements, which have increased thermal energy demand. The settlement of Konitsa in Greece has been selected as case of study.

For this purpose, a methodology has been composed, whose main characteristic is the modeling of the settlement under study by creating several model houses. These models are introduced into technical software, which calculates their exact energy demand, by also taking into account the meteorological conditions of the region. Based on the settlement’s special requirements of thermal energy, five different energy saving alternatives have been formed. For each one of the alternatives, the amount of energy saving, the economic benefits, as well as the cost of the necessary investments have been estimated.

The application of thermal insulation at the external walls of the buildings is the most effective solution, as far as economic performance is concerned. Improving the buildings’ shells in mountainous settlements, where the climatic conditions are cold, leads to particularly high energy savings.