HUD’s Sustainable Communities Resource Center has developed a matrix to measure the Savings of Green Building Technologies. The matrix highlights 10 proven and affordable green building technologies organized into four categories: Building Envelope, HVAC, Management and Use, and Water. Each product features a brief description for general reference; technical overviews are addressed by the resources highlighted in the “Additional Information” section. These entries have a track record of providing savings, are affordable across building types and scales, and are viable in diverse climates. This document is a simple, accessible, cogent tool to educate and motivate builders about the nuanced economics of green building.