Integrated building design should take into account environmental, social and economic dimensions of sustainability. Building design from energy performance ranges from architectural design to the application of technologies for energy con- servation. Many applications are focused on insulation of facades, roofs and floors to those that are used systems for renewable energy sources. The aim of the innovations is not only energy saving but also reduces costs and preserves natural resources. One key element of low-energy building design is using the basic form and enclosure of a building to save energy while enhancing occupant comfort. Besides energy need for building operation the significant part of the total energy is energy used in the extraction, processing and transportation of materials used in buildings. This study is aimed to analyze the building materials and structures in terms of embodied envi- ronmental impacts and monitoring of physical factors of indoor environment. The paper deals with evaluation of environmental and energy indicators in selected low-energy family house and its optimization in order to reduction of environmental impacts.