When the service life of reinforced concrete structures comes to an end, demolition and either material recycling or landfill disposal become the final steps. According to EN 15804, the most widely used reporting standard for Environmental Product Declarations in construction, the final product stage is referred to as the end-of-life stage (stage C, EOL) and encompasses modules C1 to C4. EOL covers the deconstruction/demolition of the structure (C1), transportation to waste processing sites (C2), waste processing for reuse and/or recycling (C3), and, if applicable, waste disposal (C4). Understanding the environmental impact of the C stage encourages designers and owners to choose recyclable/reusable materials to reduce this impact. Currently, eco databases contain minimal information about the EOL stage. This paper aims to perform a life cycle assessment of the demolition of reinforced concrete structures and their processing for a) recycling and b) landfilling. The findings can enhance environmental impact assessments that cover the entire life cycle of reinforced concrete structures.