This collection contains nearly 6,000 files of the company covering the period from 1889 to 1921, with the bulk of documents produced between 1911 and 1920. The majority of the collection is comprised of unsuccessful architectural bid documents, each noting the architect, building, and location, as well as estimated costs, sketches, and related correspondence. These bid records provide information for 6,248 separate projects in New York City, the United States, and several foreign countries. These bid documents represent commissions not awarded to NYATCC, and do, in some cases, indicate the outcome of the bid. Architects represented include Carrère & Hastings, D.H. Burnham & Co.; Cass Gilbert; McKim, Mead & White; George Post; Warren & Wetmore; Schwartz & Gross, and many others.
The collection also contains correspondence files and office memoranda, including some describing the formative years, 1911-1914, of the National Terra Cotta Society, as well as trade catalogs and job photographs. Also of note are two albums containing photographs of sample pieces of terra cotta, and month-by-month construction records for three buildings: the American Theater (42nd Street, New York City, 1892) designed by Charles Coolidge Haight; the Renaissance Apartments (Brooklyn, N.Y., 1889) and the Imperial Apartments (Brooklyn, N.Y., 1890) both designed by Montrose Morris.