This chapter introduce the exploration of the monograph on the role of architectural design in Colombia’s peacebuilding process following the 2016 Peace Agreement between the national government and the FARC-EP guerrilla. It examines the architectural responses developed within transitional frameworks such as the Development Programs with Territorial Focus (PDET) and the Territorial Spaces for Training and Reincorporation (ETCR), with particular attention to San José del Guaviare—a municipality heavily impacted by the armed conflict. The study adopts a multi-method qualitative approach grounded in participatory action research and structured in three phases: development of a theoretical model of architectural design for transition, analysis of built projects in the case study area, and formulation of design tools tailored to the Colombian post-conflict context. The research identifies the need to transcend conventional design paradigms by incorporating tools that respond to local complexities, promote community ownership, and foster autonomy. Through comparative analysis with similar international cases, the study proposes design methodologies that serve not only technical and spatial functions but also support social transformation and the non-repetition of violence. Ultimately, this work contributes to the creation of context-sensitive architectural practices that enhance the impact of built environments in peacebuilding efforts.