The construction industry has a significant impact on the environment, and from the extractionof raw materials to the construction process to the operation and maintenance of buildings, eachphase contributes to environmental degradation in various ways. Consequently, promotingreuse in the Swedish building sector holds excellent potential for substantially reducing wastegeneration and CO2 emissions, aligning with broader sustainability objectives. We are tryingto create a circular economy paradigm where construction materials and resources are reused,remanufactured, and recycled, minimizing waste and environmental impact. However,realizing the full benefits of the Circular Economy requires significant changes in thinking andthe adoption of innovative business models. The project aims to identify barriers to the reuseof concrete in Sweden's construction sector, along with their causes and effects. A literaturereview was conducted to understand various barriers, forming the basis for subsequentinterviews with experts in a similar field, which is qualitative and semi-structured. Aninnovative collaboration project named Återhus helps to facilitate a comprehensive approach,exploring the challenges hindering reuse practices to inform strategies to overcome thesebarriers and promote greater reuse. The overall results, analysis, and discussion from all thesestudies reinforce the comparison of the views and experiences of different stakeholder groupsand how these differences affect the overall implementation of reuse in construction. Theseinterviews identified barriers and grouped them into the following categories: standardization,economic, material handling, knowledge, and technical barriers. Many barriers are highlyinterconnected, and multiple connections were found within knowledge within the market, aswell as a lack of standardization within the people's knowledge, culture, and understandingtoward a new transition of circularity for reuse.