This thesis has evaluated environmental classifications of projects and the lessons learned to explore what the possible ramifications of implementing this in the construction and infrastructure are. Companies today are looking to develop methods to demonstrate their environmental commitments, but there is an uncertainty regarding the contribution of environmental classifications in this aspect.The literature review presents the theory of environmental classification, which provides a general knowledge of its function. The empirical data is based on an analysis of existing classification methods and qualitative interviews. The analysis shows specific environmental classification system for the area of construction and infrastructure. CEEQUAL is currently the only environmental classification applicable to Swedish projects and therefore serves as the basis for the continued analysis.