Don Carlos Young, Jr. photograph collection, 1926

Don Carlos Young, Jr. (1882-1960) was the son of Latter-day Saint Church Architect Joseph Don Carlos Young and grandson of Brigham Young. Don Carlos Young, Jr. was born in Salt Lake City on 5 August 1882, and attended Brigham Young University and the L.D.S. Business College. Prior to 1905 he worked as a draftsman for the Oregon Short Line Railroad, and apprenticed in his father's architectural office. In 1906, he entered into an architectural partnership with his father which lasted nine years. The firm's work consisted of a large number of residences, mostly in Utah, as well as commercial designs for businesses such as the Z.C.M.I. Department Store. Young served a mission in Germany for the Church of Jesus Christ of Latter-day Saints from 1909-1911, and married Louise T. Hagman in June 1912.

In 1916, Young partnered with Ramm Hansen. This partnership lasted nearly forty-five years, until Young's death on 6 December 1960. The firm of Young and Hansen designed for numerous commercial, industrial, and residential clients. Their Savings and Loan Building, the Z.C.M.I Department Store, many buildings for Bennett Oil, and the Federal Reserve Bank of Salt Lake City. Young and Hansen also designed many building on the University of Utah campus. A major portion of their practice involved designs for the Church of Jesus Christ of Latter-day Saints. Among their most noted projects were the Mesa Temple in Arizona, the Washington, D.C. Chapel, and a remodeling campaign for all Church of Jesus Christ of Latter-day Saint temples in Utah undertaken by the firm between 1935 and 1953. From 1916 to 1934, architect Harry P. Poll (1880-1964) was associated with Young and Hansen. His name was incorporated into the title block of many of the drawings during his eighteen years.

Young was a life-long honorary member of the American Institute of Architects and received numerous awards and commendations for his work. Don Carlos Young, Jr. died on December 8, 1960.