The Timbers at Whispering Pines are "Built Green" homes. Introduces in 1995, Built Green Colorado was created through the joint efforts of the Home Builders Association of Metro Denver (HBA), The Governor's Office of Energy Management and Conservation (OEMC), Xcel Energy, and E-Star Colorado. Colorado boasts the largest green building program in the nation, and Whispering Pines is pleased to be a part of this growing organization changing the way homes are built.