This study aims to explore the policy implications of documented indigenous practices in vernacular housing in Northern Philippines towards sustainable green architecture. The research is grounded on the need to address the growing concern for environmental degradation and how indigenous knowledge can be used as a solution. The study utilized qualitative research methods including interviews, observations, and archival analysis to gather data. Results reveal that traditional housing practices of the Itawes, Ibanag, and Malaweg promote sustainable architecture, which emphasizes the use of locally sourced materials, passive cooling and ventilation systems, and climate adaptive practices. However, these practices are threatened by modernization, lack of policies and regulations, and limited awareness of their environmental and cultural significance. This study underscores the need for policy reforms that support the integration of traditional practices into contemporary sustainable architecture. The documentation of indigenous practices also serves as a resource for educators and policymakers in developing sustainable, culturally sensitive designs that address environmental challenges.
