An ordinance that requires that any residential development which shall generate more than 500 ADT (Average Daily Trips) shall be subject to a Community Impact Assessment review process and approval criteria are outlined in Section 18.55.090 of the Carbondale Municipal Code. For mixed use projects (commercial and residential), 1,000 ADT is required in order to have a development subject to Community Impact Assessment process.

This ordinance requires that new commercial and residential buildings or 'substantially improved' buildings to meet specific energy performance standards. The ordinance requires commercial and high rise residential structures between 10,000 and 50,000 square feet to meet basic LEED (Leadership in Energy & Environmental Design) certification from the U.S. Green Building Council. In addition, buildings equal to or larger than 50,000 square feet must meet the LEED Silver certification.