Finn Geipel is the founder of two architecture and urban design firms: LABFAC, based in Paris and operating between 1987 and 2001, and Berlin- and Paris-based LIN, operating since 2001. Geipel focuses on finding adaptable and integrative solutions for architecture and urban development. LABFAC’s and LIN’s designs of varied scale always consider the ever-changing urban and ecological conditions. Both firms did and continue to collaborate with experts from other disciplines, such as climate and circular design, economics, mobility, ecology, as well as philosophy, art, and cultural studies. This first monograph on Finn Geipel and his work with LABFAC and LIN features their key built and unrealized designs and research projects since 1985. The evolution of their working methods and thematic and research focuses is explained, supported by rich visual material. Contributions by fellow architects and teachers as well as personal friends, such as Hashim Sarkis, Joseph Hanimann, Riken Yamamoto, and Bénédicte Savoy, offer a critical perspective on Finn Geipel’s achievements in the context of current debates on architecture and urban design.