The 2015 IECC-based Residential and Commercial Building Energy Standards (2015 Vermont RBES and CBES) became effective March 1, 2015. The RBES Stretch Code became effective December 1, 2015 and has been the working stretch code since then. The 2015 RBES Handbook is available as a resource for state officials. The CBES Stretch Guidelines were adopted in May 2016 and became effective June 1, 2016 and has been effective since.
NEW: Vermont is reviewing its Residential and Commercial Building Energy Standards (2019 Vermont RBES and CBES, respectively) and its Commercial Building Stretch Code and is basing these updates on the 2018 IECC, though their bills largely exceed the IECC requirements. These updates have been submitted to the Legislative Committee on Administrative Rules for adoption by the state, which meets next on September 5th, 2019.