Members initiated the survey phase of its Historic Preservation Program in the sixties by canvassing and recording all buildings, residential and commercial, constructed prior to 1850 in Ulster County. After four years of research on over 1700 homes, the results of this project were cataloged and forwarded to the Library of Congress in seven volumes.
In 1974 with help from the New York State Council on the Arts, the League used the findings of their previous historical survey to publish the book Early Architecture in Ulster County