A few years later, he held his first solo exhibition in 1961 at age 15, a showing of hand carved animal sculptures (Provençal Stone) at the Prigent Gallery in Rouen.

His preferred materials are: exotic woods, stone and marble; metals such as copper, aluminium, bronze or stainless steel; polyester and concrete, sometimes reinforced with fiber inclusion.

Beginning in the post-WWII reconstruction years, thanks to culture-promoting politics and subsidized support for the arts in France,[10] Lechevallier's work was commissioned by both municipal government and the French State.

As Corinne Schuler says in Sentiers de la Sculpture: "By forcing art into confined spaces, you lose so much in terms of its beauty.

"[11] Two specific examples of this are Point d'orgue and Croix des Gardes: Another one of Lechevallier's specialties is Fountains,[13] demonstrating how water movement and sound can make a sculpture sing.