 He was employed from 1689 (Kimball) on works in the Bâtiments du Roi under Mansart, notably at the Orangerie of Palace of Versailles and in Paris at Place Vendôme, where Boffrand was among the draughtsmen responsible for the first designs (from 1686) and for the Convent of the Capucins, Hôtel de Vendôme From 1693 he was less employed and in 1699 he left the Bâtiments du Roi to commence work, at first in Lorraine and in the Netherlands, then after his return to Paris in 1709, for a distinguished private clientele in Paris, well disposed towards his audacious innovations, such as the oval forecourt of the Hôtel Amelot de Gournay (1710–13), that were unthinkable in the royal works.In 1709, he was placed in charge of the interior apartments of the Hôtel de Soubise, where he soon succeeded the architect Pierre-Alexis Delamair (1676–1745).None of his early interiors survive, largely replaced by his spectacular Rococo work of the years following 1735.