Jewel Theatre - built sometime between 1930 and 1945. The theatre was closed, gutted and converted into office space sometime between 1950 and 1965.
McKay Clinic - according to a City of Humble Preservation Committee plaque, this was built in 1937, and was used up until 1996 as a doctors' offices. It's a great example of the Art Deco style of the time.
Humble Camera Center, located in the Defee building. According to a City of Humble Preservation Committee plaque, the building was constructed in 1946.