He was responsible for the management of large urban developments underway at the time, including the transformation of the districts of Graslin and la Bourse.

He saved the tomb of Duke Francis II of Brittany and Marguerite de Foix during the destruction of the Carmelite church in the ducal parish in 1793.

In 1808, he was asked by the sculptor François-Frédéric Lemot (1771–1827) to create a landscaped area of Italian inspiration in the town of Gétigné (near Clisson).

He started building the park and built the maison du jardinier de la Garenne between 1811 and 1815, one of the masterpieces of architecture in the rustic Italian style in France.

His niece, Justine Crucy, married Louis-Prudent Douillard, an architect, in 1821 and in 1823, another niece, Zita Crucy, married Louis-Prudent's brother Constant, an architect too, who designed some of the hospitals of Loire-inférieure, notably St. Jacques General Hospital in Nantes, and the place du Sanitat in the same town.