Answer

Many details on air rights in New York City can be found on the website of the New York City Department of City Planning. To learn about air rights, also known as Transferable Development Rights, view the full Zoning Resolution; search PDF format of the text for the phrases air rights and development rights.

Also, view the Directory of Manhattan Office Buildings (HD268.C97, published by CoreLogic) in the Ready Reference collection at the Jack Brause Library, located at:

NYU Midtown Center
11 West 42nd Street, Suite 510
New York, NY 10036