Green building has gained equal, if not greater, traction in the low-income housing community, even though environmental strategies are typically associated with high-end design. A major catalyst for the greening of affordable housing is the financing tool, familiar to housing insiders but relatively obscure to most other professionals, known as the Low Income Housing Tax Credit program, Section 42 of the IRS Code. Recognizing the substantial influence that LIHTC allocation criteria have in affordable housing development, Global Green USA, a national nonprofit focused on urban sustainability, began to review and rank green building items promoted in each state’s QAP.