Building footprints in New York State from two different sources: Microsoft and New York State Energy Research and Development Authority (NYSERDA). NYSERDA Building footprints that were created as part of the New York State Flood Impact Decision Support Systems http://fidss.ciesin.columbia.edu/home Footprints vary in age from county to county.

New York State subset of Microsoft Building Footprints realeased 6/28/2018 - vintage unknown/varies. More info on this dataset can be found at https://blogs.bing.com/maps/2018-06/microsoft-releases-125-million-building-footprints-in-the-us-as-open-data