This book offers an international overview of how to apply the Conservation Management Plan (CMP) to the 20th-century architectural heritage. Although the CMP is universally considered a fundamental tool for sustainable management of the built heritage, the application to 20th-century buildings is still limited. The book illustrates selected case studies from different countries to discuss how best to preserve the authenticity of the original materials, manage changes in use, engage users and stakeholders in this process, and make conservation and sustainability work together. "Conserving 20th-century architecture" will provide insights for scholars and students and assist architects in drafting an effective conservation management plan.