The external effects arising in the process of energy production within areas of valuable nature are characterized by certain peculiarity resulting from specific conditions of those terrains. Planning of local energy supply requirement has to take into consideration in choice of criterion of the scenario of power industry development, external costs required in the first place in identification of external effects. Both environmental external effects as well as social external effects have to be taken into consideration. The issue becomes even more complex when appreciation of full cycle of life of an appliance or external drag effect come into view. Another complex problem is as well the separation of external effect caused by local energy sources and other causes either local or global.