Grinnell College recognizes the importance of constructing and renovating buildings in a manner that is environmentally responsible. Specifically, the college has adopted a green building policy that affirms: "Grinnell College recognizes that environmentally responsible design should minimize the environmental impact and lifetime operational costs of college owned buildings. Building designs that are environmentally responsible promote energy efficiency, land stewardship and resource conservation, which, in turn, preserve the natural resources of the Grinnell community and the surrounding region. Financially, building design that incorporates life cycle cost analysis is important to responsible long-term fiscal planning for the College. To the extent that their implementation is consistent with the mission of Grinnell College and incurs reasonable expenses, the set of building principles described below collectively provide the framework for all new major construction and major renovation of buildings on campus. Architects, contractors, engineers, landscape architects, and all others involved in building projects on Grinnell's campus are expected to follow these guidelines."

Environmental Education Center at CERA (LEED Gold Certified)

Energy efficient technologies utilized in the EEC include geothermal heating and cooling, daylighting and daylight censors, and occupancy censors. Water conservation efforts include rainwater collection for toilet flushing and greenhouse irrigation as well as dual flush low flow toilets. A 50KW wind turbine provides most of the electricity for the building as well. Additional green attributes include local and recycled building materials, low VOC paints and native landscaping.

East Campus dorms (LEED Certified)

The East Campus dorms were built with Iowa limestone from Stone City, Iowa. The most interesting energy conservation technology utilized was the installation of window censors. These censors sense when a window is open and consequently turn heating and cooling off to the room. Other attributes include daylighting, dual flow toilets, and water efficient landscaping.

Joe Rosenfield '27 Campus Center (LEED Certified)

Examples of energy efficient technologies utilized at the Rosenfield Center include daylighting controls, triple glazing of the "wave wall", white reflective roof, and a thermal energy wheel that recovers heat from exhausted air.

Robert N. Noyce '49 Science Center Phase II (LEED Silver Certified)

Energy saving technologies used include heat reclamation, a white reflective roof, and variable frequency sash hoods with occupancy sensors. A rainwater collection system also provides irrigation water for the greenhouse.

Athletics Phase II of the Charles Benson Bear '39 Athletic Center(LEED Silver Certified)

Phase II of the Athletics Center included an indoor pool and an indoor track facility. Energy efficiencies include geothermal heating and cooling of the natatorium (pool building), carbon dioxide censors to correlate ventilation rates with actual occupancies, and heat recovery from exhaust air. Rainwater collection from the roof of the indoor track is collected to supply all of the irrigation necessary for the football field as well as flush a number of toilets.

Grinnell College Preschool

Construction included the third geothermal system on campus. Other highlights include a 3.36 KW solar array, daylighting censors, occupancy sensors controlling lighting and HVAC systems, in floor heating, efficient lighting, heat recovery from exhausted air, energy star appliances, and dual flush toilets.