On October 3, New York's new 2015 IECC-based energy code became effective. State amendments to the model code will not be incorporated into the code books but are available in the 2016 Energy Code Supplement. An "unofficial" web version of the New York State energy code is available here. Note that the NYC Energy Code, which also went into effect in October, is even more efficient than this new state energy code (including additional insulation and air leakage testing requirements).
NEW: New York is developing a voluntary stretch code which, upon its completion by the end of 2016, give local governments that wish to demonstrate leadership on climate change and reducing greenhouse gas emissions a clear and high-impact opportunity to do so. "NYStretch" aims to provide a straightforward, flexible approach to achieving an approximately 10 percent energy boost in energy savings beyond code for residential, commercial and multi-family buildings. An October 13 webinar provided an overview of the development and potential applications of the NYStretch Energy Code.
UPDATE: NYSERDA has posted a draft of NYStretch. Public comments should be submitted before March 24.
LOCAL FOCUS: In July 2016, the City and Town of Ithaca, NY began a project to determine what policy tools can be used to incentivize or mandate green building standards for new commercial and residential construction.