As communities confront heat waves, flooding, and unreliable energy infrastructure, problem properties present a unique opportunity for climate mitigation. Rehabilitating these properties can bolster climate resilience and contribute to a greener future. This session will highlight opportunities to reduce greenhouse gas emissions by upgrading existing buildings to energy-efficient standards during the rehabilitation process. Attendees will learn how enhancing existing buildings' performance, rather than opting for new construction, can significantly lower emissions and promote more energy-efficient, walkable neighborhoods.