Cx Associates was retained by Champlain College to commission the college’s renovation of Roger H. Perry Hall. Built in 1859 by lawyer and diplomat Edward Phelps, it is one of only 11 houses in the South Willard Street Historic District that predates the Civil War and is an Italianate-style brick home with elements of Greek revival. The college’s plan for the building included energy-efficient climate control systems, including a geothermal pump from Perry Hall's deep wells. The building was renovated to LEED standards which recognize performance in five key areas of human and environmental health: sustainable site development, water savings, energy efficiency, materials selection and indoor environmental quality.