The estimation of thermal energy consumption and the relevant costs in the residential and tourist sector in the area of Zagori is the main objective of the present paper. Moreover, the paper aims at highlighting the significance of the problem of energy sufficiency in the area, especially during a period of economic crisis characterized by increased diesel oil prices. The energy needs in seven settlements in the municipality of Zagori are calculated with respect to the climatic conditions and the characteristics of the buildings. A model of a typical hostel is also created, in order to assess its energy demand. In order to realize the intensity of energy costs in mountainous areas, a comparison of the energy and economic data between the area of Zagori and other areas with lower altitudes is accomplished. Furthermore, the benefits of the subsidy policy, as far as diesel oil is concerned, for the households are calculated. Due to the high fuel prices and the great energy demand in mountainous areas, it is assumed that in the region of Zagori the problem of energy poverty is extensive and cannot be issued by the existing policies. So, a set of measures is proposed – that should be a part of an efficient mountain policy – in the direction of supporting the seamless coverage of energy loads in houses and hotels.