The IEA-ECBCS-Annex57 project aims at an Austrian collaboration in the IEA Annex 57, which focuses on methods for the Evaluation of Embodied Energy and Carbon Dioxide Emissions of Building Construction and materials. Results and methods from several other research projects on this topic are summarized and evaluated. In addition this results then are compared to different international projects. The final aim is to achieve international guidelines for the evaluation of building constructions, with low embodied energy and CO2 Emissions. Networking with stakeholders and the international research community is created through the cooperation and national dissemination in Austria.