Hewitt was born in Red Wing, Minnesota. After a partial course at Hobart College he entered the University of Minnesota in the sophomore class in 1893, graduating with the degree of A.B. in 1896. He then went to the Massachusetts Institute of Technology, where he studied during the winter of 1896–1897. The next three years were spent in the offices of Shepley, Rutan and Coolidge, Wheelwright & Haven, and others. He was married in 1900 and went at once to Paris, where he entered the École nationale supérieure des Beaux-Arts in May, 1901 where he became a member of the Atelier Pascal. In October, 1904, he returned to the United States, but he had completed his work at the Ecole. Arriving in Minneapolis, he was almost immediately offered a commission and at once started in on private practice, not having an opportunity to return to Paris for over eight years. As time went on he realized the importance in architectural work of the allied science of engineering in all its branches, and in September, 1910, he formed a partnership with Edwin H. Brown under the name of Hewitt & Brown, architects and engineers. Hewitt was instrumental in the work which culminated in the completion of the Minneapolis Institute of Arts. He was president of the Minnesota State Art Society. He became a member of the American Institute of Architects in 1913, and was president of the Minnesota Chapter of the American Institute of Architects.[3] The practice of Hewitt and Brown continued until Brown's death in 1930. Hewitt resumed private practice, but as business declined during the Great Depression, he closed his office and became the chief architectural supervisor for the Federal Housing Administration for the Minneapolis area. He died on August 11, 1939.[4]
Legacy
Though their work was concentrated around Minneapolis, Hewitt & Brown are known to have designed buildings in northern Minnesota and in Wisconsin.
Alone or in association with Brown, Hewitt was responsible for the design of a number of buildings which have been listed on the United States National Register of Historic Places.