The construction industry in Egypt is a main contributor to the Egyptian economy and one of its fastest rising sectors. The development rate is the direct result of high request for housing as well as the state ’s large infrastru cture projects. The main common construction materi- als in Egypt are the adobe/clay, cement, sand and straw/raw brick. Recently, the private manufac- turers have commercially produced walls for low- rise structures up to three stories high by propos- ing a new building system called a 3 -D panel system (3 -D PS). The 3D -PS is currently being used in many building in Egypt, without any environmental assessment regardless of the structural system or aesthetic. Therefore, this paper comes on line to assess the environ mental impacts of this new construction system. It compares its performance with that of the other traditional con- struction materials/methods. The software SimaPro 8.1 is used under IMAPCT 2002+ method to compute the environmental impact assessment of the 3D -PS. The results show that the clay brick has largest adverse impacts than the 3D -PS with a difference of 7%. In contrast, the sand and straw/raw brick have a lowest adverse impacts. Comparing the 3D -PS with sand brick, the latter has lower adverse impacts by 81.40%. It is concluded that the clay brick is the worst from envi- ronmental impact point of view while the best is the sand brick and straw/raw brick. Between the worst and the best comes the 3D- PS. The study recommends carrying out a life cycle assessment of any new product/material before using it.