Parent restored and transformed several hôtels particuliers in the Faubourg Saint-Germain for high aristocratic families. He worked on the Hôtel de Boisgelin, located at 47 rue de Varenne (VIIe arrondissement), and transformed it for the Dukes of Doudeauville and of Bisaccia. He put up panelling originally in the Château de Bercy, and creating a chapel, a winter garden, a dining room, stables for 25 horses, two rooms for 8 carriages, two cellars and a grand staircase ("escalier d'honneur") panelled with polychromatic marble plaques, which was inspired by the queen's staircase at the Palace of Versailles. The building now houses the Italian embassy in France.[when?]
Parent also created three luxurious Persian residences:
Hôtel particulier 5, Avenue Van Dyck (VIIIe arrondissement), in the Eclectic style with ornaments sculpted by Jules Dalou, for the industrialist Émile Menier from 1870–1872 (today a private residence[when?]).
