In the construction industry, a circular bioeconomy centers on rethinking the full lifecycle of materials, from planning through to the end of a building’s use. This approach prioritizes conserving resources at every stage: reducing reliance on new raw materials, extending building lifespans, and ensuring that materials and components can be reused with high quality. At its core, this is about resource conservation. Renewable materials are gaining ground, supported by life cycle assessments focused on climate impact and bolstered by expanding technical possibilities. Nature’s biological cycles offer inspiration for how to manage resources responsibly. Beyond the ideal of resource conserving planning and optimized value chains, bioeconomy is a matter of design an therefore understanding / human perception of building materials or architecture. This is addressed by understanding  bioeconomy as a metaphor. This chapter outlines the key aspects of circular bioeconomy in construction, touching on everything from institutional frameworks and material flow management to technological innovations, material networks, and the cultural and communicative aspects that drive meaningful change.