Greenhouse gas emissions drive climate change, posing a global challenge with serious consequences ranging from glacial melting to societal disruptions. Sweden has introduced a climate policy framework to achieve climate neutrality by year 2045, with the construction and real estate sector accounting for about 21 percent of total greenhouse gas emissions. Concrete, despite its long history and versatility, significantly contributes to the climate crisis. The problem is serious where a circular construction sector and concrete reuse can reduce the carbon footprint and contribute to Sweden's environmental goals. The study focuses on today's challenges with concrete's extensive climate impact and the insufficient reuse of older concrete buildings and strives to identify solutions for the reuse of concrete walls. Real estate companies Castellum and Vectura, along with consulting firm Bjerking, lead a reuse project for circular construction in Främre Boländerna. The properties of concrete, including its compressive strength, vary depending on the area of use, ranging from general building structures to commercial and industrial buildings. Previous research has shown that there is great potential for reuse, but also many challenges. The report's methodology includes interviews with six respondents, three field visits, compressive strength tests of concrete samples, and an extensive literature review, all to answer the study's purpose and problem. The interview study indicates that there are several challenges with reuse and the concrete samples show suitable compressive strength values for reuse with approved crack creation. The study's conclusions show that the concrete from Främre Boländerna can be used for general structures like homes and parks, but not for commercial buildings that require a load-bearing building frame. The main challenges identified in the study are intermediate storage, economic factors, legal issues, lack of standards and guidelines, reuse depots, and logistical problems. Despite these challenges, future opportunities appear promising.