Attended Stanford University, graduated in 1934; in the 1940s, Hoag began a Los Angeles architectural practice, before retiring to Washington state; Hoag lived in Brentwood, Los Angeles, CA, c. 1955; He became a Fellow of the American Institute of Architects in 1982; a prolific writer, Hoag made regular submissions to L.A. Magazine, and wrote a novel on the musician Antonio Vivaldi; he died in 2003, at the age of 89 in Bellevue, WA; an archive of Hoag's work exists in the Architecture & Design Collection (ADC) University Art Museum, University of California, Santa Barbara;

Survivors: his wife of 35 years, Nancy; two sons, Peter and Robert; two daughters, Jane Brown and Suzanne LaCabe; seven grandchildren; one stepson; three step-grandchildren; and his brother.