 With the emergence of French Art Deco in the 1920s, Oviatt found the architectural style that would embody the interior design of his 1928 "James Oviatt Building" and its penthouse.The Oviatt Building was designed by the Los Angeles architectural firm of Walker & Eisen.Excavation for the Oviatt Building's construction was begun in August 1927; the building was completed in May 1928.