In 1926 Baum designed forty two Mediterranean Revival style houses of varying sizes in the City of Temple Terrace, Florida, this is thought to be the largest collection of his work in the Southeast. He also designed Sunset Hill for Mrs. Eugene D. Stocker at Warren, New York in 1923-1924. It was listed on the National Register of Historic Places in 2007. During the Depression, Baum became involved with historic preservation issues, becoming involved with Good Housekeeping Magazine as consulting architect, and as designer of their building exhibit at the 1933 Chicago World's Fair.