Somerville designed the original McMaster University buildings in Hamilton, Ontario, and the Rainbow Tower complex in Niagara Falls.

Somerville was a favoured architect of T. B. McQuesten, Ontario's Minister of Highways and Public Works in the mid-1930s.

McQuesten was the figure in the Ontario Government responsible for many public works that Somerville was involved in.

For McQuesten, Somerville worked on the design of the Queen Elizabeth Way, which was built to facilitate the travel of American tourists into Ontario, including the Henley Bridge and the Lion Monument.

[6] Another example of Somerville's work in Niagara Falls is the Oakes Garden Theatre, for which he collaborated with Canadian sculptors Florence Wyle, Frances Loring and Elizabeth Wyn Wood.

[8] In 1927, Somerville made a speech urging the close collaboration of fine artists and architects.

[9] The Somerville-designed Cawthra-Elliott residence in Mississauga, Ontario, is notable and designated a historic place.

Somerville designed it in a Georgian Revivalist style, according to his philosophy that "a perfect Canadian home must descend directly from the cottages of England.