Until recently, residential buildings lagged in green certification because the cost-benefit analysis is different than for office buildings. ANSI approval of the National Green Building Standard (NGBS) opened the door to cost-effective, credible, marketable green certification for homes and apartments. The green housing market is poised to double from what it was in 2013—going from $37 billion (27% of market) to $90 billion (up to 33% of market) by 2016. This presentation will describe the NGBS and the NGBS Green certification program, as well as emerging green building trends with the development of the 2015 NGBS sponsored by ICC/ASHRAE/NAHB.