In 1837 he married Eleonore Gauvin, a member of a prominent French Catholic family in the city.
His marriage ensured entry to French Canadian society, he was appointed diocesan architect for Montreal.
In 1849 he formed a partnership with his nephew Henri-Maurice Perrault (1828–1903), this was the formation of one of the first architectural dynasties in Canada.
He mostly worked in the Greek Revival style of architecture.
His first work in Montreal was the city's original Custom House, completed in 1836.