The "Tribal Housing Innovation Act" mandates the Secretary of Housing and Urban Development (HUD) to establish a competitive grant program within one year of enactment. This program aims to support Indian Tribes and Tribally designated housing entities in developing sustainable housing solutions on Tribal lands. Eligible entities can apply for grants to undertake two primary activities: either constructing new residential dwelling units that incorporate at least one sustainable feature , or retrofitting existing units by adding such features. Applications must detail a comprehensive plan, identify other financing sources, and demonstrate the entity's capacity to execute the proposed project. A key provision requires that any residential dwelling unit built or modified under this program must be rented exclusively to members of the Indian Tribe or members of an Indian Tribe served by the Tribally designated housing entity. This ensures the direct benefit of the program reaches Tribal communities. The bill defines a wide range of sustainable features , including building-to-grid integration, electric heating systems, energy-efficient appliances, solar panels, and insulation, among others determined by the Secretary. Both grant recipients and the Secretary are subject to reporting requirements to track progress and assess the national impact of the program. To fund these initiatives, the bill authorizes an appropriation of $150,000,000 for fiscal year 2025 and for each subsequent fiscal year. This significant investment underscores the commitment to improving housing sustainability and energy efficiency within Tribal communities.