Tachau and Vought was an American architectural firm active in the mid-twentieth-century New York City that specialized in mental hygiene hospitals. It was established in 1919 as the successor to the architectural firm of Pilcher and Tachau by William G. Tachau (b. 1875) and Vought. By 1946, Vought had left. Eliot Butler Willauer (April 4, 1912 – February 6, 1972) was a principal from around 1945 until 1946. The firm moved from 109 Lexington Avenue to 102 East 30th Street around 1923.
Like many New York architectural firms active during the Great Depression, Tachau & Vought worked in “almost continuous employment on Federal, State or City work,” which included its inclusion on Mayor Fiorello LaGaurdia’s list of architects since the compendium's inception on. “From 1918...[the firm] specialized in mental hygiene hospitals.”