Along with international efforts to evaluate, reduce and limit negative impact on the environment as wells as detrimental effects on human health, architectural and construction industries started to put more their emphasis on sustainability. As a consequence Life Cycle Assessment (LCA) software tools have been developed to help design and construction professionals to evaluate and document the environmental impact of the life cycle of a building. This thesis aims to present a state of the art review on currently available buildingrelated LCA software tools. A range of representative software tools are thoroughly assessed with respect to usability. By this case study -based upon selected tools-, the work process of these software tools will be presented and how they guide and support the decision-making in design and architectural workflow.