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We are excited to share our new Library catalog and search tool! We hope that you will find it easy to search and explore our collections. If you need help, have questions, or want to share feedback, visit the Ask a Librarian page.
"The Land Book (on reserve at Avery) is a basic source for buildings, especially if you're going to undertake further research for which you need to know the block and lot number of a building or group of buildings. The block and lot is the number under which most official records are filed. The land book also gives dimensions of lot, number of stories, present owner, and much more information." Land Books also available at the Municipal Archives.
"Old atlases, published by Peris, Bromley, Robinson, Beers, Sanborn, and others, are invaluable for tracing information on neighborhood development and on the history of a particular site. These atlases were published every few years and show what was standing at a particular time, materials used in construction, where old farm lines were, names of buildings, etc. Be sure to refer to the key in the fronts of each volume; this will aid in understanding what all of the map symbols and colors mean."
Find a buildings NB (New Building) number or Alt-Alteration number. Print this information - it will be necessary for further research at NYC Dept. of Building and to look up the building in other resources.