Pro-green building policies originated in the not-for-profit sector, and have worked their way into public policy since their inception in the early 1990s. These policies generally include Leadership in Energy and Environmental Design (LEED) for new construction and ENERGY STAR for ongoing building operations. Additional policy at the state and local level are present, and take many forms, including: (from weak to strong) blandly supporting these two main green paradigms; suggesting guidelines without teeth; leading by example with green public buildings; providing financial incentives; and mandating green outcomes by a certain date. The main question addressed in this research is: How do these policies affect the market penetration of green buildings in various commercial markets throughout the United States?