Via Executive Order 27, Maine requires that construction or renovation of state buildings must incorporate "green building" standards that would achieve "significant" energy efficiency and environmental sustainability, provided that the costs of doing so are cost-effective over the life of the building. All branches of state government are to cooperate with the Maine Department of Administrative and Financial Services (Bureau of General Services) to meet these requirements. School districts and municipalities are not required to comply with these standards.
In June 2009, Maine established the Community-based Renewable Energy Pilot Program. As the name suggests, this program is intended to encourage the development of locally owned, in-state renewable energy resources.