Circular Economy (CE) is considered a significant mitigation approach to achieve climate change mitigation. CE refers to the non-linear economic model, which enforces practices such as reusing, repairing, refurbishing, and recycling existing materials and products to keep materials within the economy for the maximum possible duration. The construction sector is a significant CO2 contributor and one of the world’s largest consumers of energy and raw materials. Thus, it is of great importance to apply CE principles in this sector. The identification of barriers and drivers is an important step in order to enhance the implementation of CE measures, with a growing scientific research interest during the last years. However, there is a need for further analysis, as well as a connection of the potential strategies - to overcome the barriers and enhance the drivers - with empirical data, driven by qualitative and quantitative research methods. This is one of the objectives of the EU Horizon Europe project CO2NSTRUCT: "Modelling the role of circular economy structure value chains for a carbon-neutral Europe". This study investigates the barriers and drivers towards the implementation of CE practices for climate change mitigation in the construction sector, as perceived by key stakeholders in the research, academic, industrial and policy communities. The research is conducted through a literature review. The outcome of the study has revealed that there is a variety of factors influencing the implementation of CE. The barriers can be classified into categories, such as knowledge, financial, management, regulatory, technical and technological barriers. For each barrier’s category, specific strategies are suggested. The results of the research will be used to structure an interview protocol addressing key stakeholders, which will investigate their perception of CE construction materials, as well as the existing barriers and drivers towards CE in the construction sector.