Some of his most important civic work was done after the war, in the aftermath of the Invasion of Normandy.
German troops had destroyed many navigational aids along the French coast as part of their retreat in 1944, and many lighthouses had to be reconstructed in the decade after the war.
Durand was charged with designing three:
ĂŽle d'Yeu Lighthouse, completed in 1950
Pointe des Corbeaux Lighthouse, completed in 1950
Pointe du Grouin du Cou Lighthouse, completed in 1958In addition, Durand was responsible for the design of L'Armendèche Lighthouse, completed in 1968 as a landfall light for Les Sables d'Olonne.
The four were built in an Art Deco style; notably, each tower was designed as a unique building, different from the others in the series.Durand was active throughout the 1950s and 1960s, continuing to design buildings for his hometown.
He oversaw the renovation of the City Hall, the Grand Casino, the place du Tribunal, and the Caisse d’Épargne, and participated in the restoration of the Abbey of Sainte-Croix.
At the start of the 1970s, he was involved in one more restoration project, the work on the church of Saint Nicholas in La Chaume.Durand died in Les Sables-d’Olonne in February 1978.
Today a pavilion in the town is named in his memory.