Optimizing reuse decisions; visualizing profitability and CO₂ savings

Abstract

The construction sector is under growing pressure to reduce its environmental impact, particularly in terms of CO₂ emissions and material waste. This master's thesis explores how to enhance reuse decision-making in renovation projects by applying structured decision-making models that strike a balance between environmental responsibility and economic viability. By combining a systematic literature review with qualitative interviews with professionals in the Swedish real estate sector, the study highlights key factors that influence reuse choices, such as CO₂ reduction, economic factors and technical lifespan. A decision-support framework using the TOPSIS model is created, offering a clear method for comparing and prioritizing reuse alternatives using multiple weighted criteria. The results underscore the critical role of internal expertise, consistent use of standardized indicators and effective data visualization in facilitating a more systematic approach to reuse. Although organizations recognize the value of reuse as part of their long-term climate goals, challenges such as unclear responsibilities and high labour costs persist. This study contributes to the field by showing how practical tools and organizational strategies can work together to make sustainable reuse a more attainable objective in the construction industry