Designed many buildings in Los Angeles, including the Capitol Records building and the Beverly Hilton Hotel.
He graduated from the University of Washington in 1927 with a degree in architecture. He and classmate Walter Wurdeman partnered with Charles F. Plummer after settling in Los Angeles in the early 1930s. The team worked on the Pan-Pacific Auditorium, leading to many other residential jobs, some of which were for celebrities like James Cagney and Robert Montgomery.
He became a fellow of the American Institute of Architects in 1952.
His two sons, Welton Becket II and Bruce Becket, also became architects.
He designed the Ronald Reagan Medical Center at UCLA, where Steve Martin went to school.