As the green building movement matures, a stronger focus is evolving on short-term and long-term occupant health impacts. The partial redevelopment of Old Colony in South Boston offered a unique opportunity to evaluate both the efficiency and health impact of the green strategies. The Harvard T.H. Chan School of Public Health evaluated the health outcomes associated with living in the new green housing, and the research revealed significant improvements in health among residents who moved from the existing housing into the green units. In this session, we will provide strong evidence that green interventions not only improve the environmental performance of housing, but also tackle major public health challenges in low-income communities.