Devon Bank's Wheeling branch is a leading example of sustainable "green" commercial architecture design. This innovative Devon Bank branch, designed by Cordogan Clark & Associates, has many innovative features and achieved LEED Gold certification. It is the first branch in the state of Illinois to be LEED registered. This building is part of the Devon Bank's green design initiative. It will "minimize our carbon footprint by conserving energy," says Devon Bank Vice President Dan Loundy, and "create health benefits affecting the environment, our communities and the people we service."

The building's exterior incorporates a Kawneer curtain wall system with sun shading devices, providing improved daylighting while reducing glare. The green roof employs a white PVC membrane, with 1,200 square foot planted surface for passive cooling, insulation, and storm water retention. The roof also features thirty-six solar panels that can produce up to 10kW of energy. Adjacent to the building a field of six 35' high wind spires generates additional wind energy. The building uses energy efficient HVAC, plumbing, and lighting systems. Additional green amenities include bicycle parking, preferred parking for alternative fueled vehicles, and recycling. The site itself is a Brownfield, which required installing a liquid membrane beneath the building. This project was completed by ATMI Design Build in October 2008.