He obtained a bachelor's degree in science, then studied architecture under François Goemans from 1895 to 1896.

He was admitted to the École des Beaux-Arts of Paris, where he was a pupil of Edmond Jean Baptiste Paulin.

[1] Lefort settled in Guingamp at the start of the 20th century, and was to become the leading architect in Brittany.

The hospital in Guingamp was severely neo-classical, while the Saint-Brieuc savings bank was richly eclectic.

He also drew on the local Breton architectural tradition, which he found an important source of inspiration.