We designed a family house with three different types of construction: poroton, xlam and prefabricated concrete panels. Both the concrete and wooden houses are located in three different European cities: Torino, Catania, Oslo. So we have specific stratigraphies according to the required transmittance. Then we carried out the structural analysis with a fem program, Dolmen. We also analyzed, thanks to OpenLCA, the Co2-equivalent emissions during the whole cycle of life (from cradle to grave). Finally we evaluated the thermal behavior.