"[2][3][4] Born in Berwyn, Illinois, Hewitt attended Sammamish High School in Bellevue, Washington, graduating in 1971.
After graduating from Yale in 1975, he pursued a Master of Architecture degree at the University of Pennsylvania, studying with Allan Greenberg, Robert A.M. Stern, David Van Zanten, and Steven Izenour.
While there, he taught a studio at Penn with architect Steve Izenour called Beach, Boardwalk and Boulevard: The Built Environment of Atlantic City, NJ that later became an exhibition at the Cooper-Hewitt Museum in New York.
[6] Hewitt was the recipient of an NEH Fellowship at the Winterthur Museum in 1996, and was honored with the Arthur Ross Award in 2009 for his writing on classical architecture.
The firm primarily addresses historic preservation and residential architecture with projects including restoration and renovation, new additions and some entirely new buildings.