Among numerous private and commercial buildings of that time, he is particularly known for designing two mansions: industrialist Frederick F. Brewster's Tudor-revival house in New Haven's Edgerton Park (completed 1909; demolished 1964)[5][6]: 4, 6 [7] and "Wrexleigh," attorney John Anson Garver's "cottage" on Oyster Bay Cove, on Long Island (completed c.1913).
[3][4] Soon after completing college, Stephenson joined the renowned architectural firm of McKim, Mead & White, which was known for promoting the American Renaissance in fin de siècle New York at the end of the 19th century.
"[14] The building was particularly notable for its distinctive clocktower, which The AIA guide to New York City characterized as "constructivist" in style.
[15] A 2001 New York Times article went into further detail about the building and its plaza: The architects Stephenson & Wheeler designed a 400,000-square-foot red brick factory, simple in style but with a high clock tower with sinuous tracery.
The plaza originally was landscaped, but its sense of ceremonial space was destroyed by the later construction of elevated subway lines, which now completely dominate the area.