BIM-based LCSA application in early design stages using IFC

Life Cycle Sustainability Assessment (LCSA) is an integrated method that combines environmental, economic, and social assessments. Its methodological development remains under discussion, mainly regarding the building design. This paper aims to provide a systematic, interoperable, open-source approach towards implementing LCSA in Building Information Modelling (BIM) five steps. A harmonized data structure enriches BIM objects proposed. Automation principal evaluation step provided by integrating new parameters into current Industry Foundation Classes (IFC4). Dynamo script verifies its utility case study Spain using real-time calculations visualizations. Two alternative structural systems are assessed, identification made of lowest CO2 emitter, cost, most beneficial system for local employment. The can be employed evaluate other indicators countries. Challenges limitations standardization harmonization three dimensions identified.