The Domaine du Château occupies the north-west of Chilly-Mazarin, on the plateau, next to the town centre. It is a large private condominium of 25 buildings spread over 12 hectares, served by the rue des Jacinthes, the rue des Hortensias and the rue des Dahlias. The residence also extends into the neighbouring town-centre sector, where some of its buildings stand. The Parc du Château schools are nearby.
The residence was built in the former park of the château de Chilly, erected in the seventeenth century for Marshal d'Effiat. In 1804, the estate was sold to Louis-Joseph Lecocq, who had the two wings of the château demolished in 1822 and divided the park into building plots. The documented buildings of the residence were completed in 1972, and several have undergone energy renovation. The château itself has housed the town hall since 1971.
The Domaine du Château stands at 2 238 €/m², the most affordable price in Chilly-Mazarin, 17 % below the municipal average, with ten apartment sales a year within the area used. The district is up 6 % over five years, the strongest rise in the municipality, and 3,5 % over twelve months. On this volume, the annual series cannot be read year by year.
