The paper presents the multidisciplinary project U.S. Department of Energy Solar Decathlon 2013 in the context of integral design approach. On this project the students of architecture, building technology, electrical engineering, structural engineering and building services from the Czech Technical University in Prague participate. Uniting knowledge of different disciplines involved in the building design process is the most promising way to pursue sustainable design solutions. In order to meet new design challenges for the sustainability of the built environment it is necessary to apply such methods, that bring more diversity and knowledge already in the conceptual design phase. This is possible only by integrating all design professions from the beginning of the design process and transforming the team's knowledge into the creation of new architectural concepts.