The City of Fort Collins, Colorado increased the number of homes that are energy efficient through the use of community-based social marketing. Strategies to maximize impact included identifying neighborhoods based on data analysis, simplifying the process for completing upgrades, and using trusted messengers for delivery of tailored messages on energy efficiency services.

When shopping for a new home, homebuyers look to real estate agents for advice on everything from the best school districts to the name of a good local plumber. Because new owners make many home improvements after purchase, real estate agents have the opportunity to continue as trusted messengers after the closing date. Nonprofit organization Build It Green (BIG) saw an opening: if real estate professionals understand the importance and benefits of energy efficiency, then they can advise clients on how to incorporate efficiency into their home improvements.