Châtillon–Montrouge station

[7] The station will consist of five intermediate levels, including a mezzanine, with an artistic ceiling in the atrium designed by Laurent Grasso and David Trottin.

The 800 m2 (8,611 sq ft) work will consist of 2750 printed aluminum blades that form a trompe-l'oeil sky inspired by Renaissance paintings and will vibrate with the circulation of air.

[8][9] As part of the Illustrer le Grand Paris programme by the Société du Grand Paris, which aimed to illustrate Ile-de-France territories served by the new métro lines, the station's platforms will feature a fresco designed by Roxane Lumeret.

[7] Civil works, including the excavation of the station box, were completed in end-May 2022.

The installation of infrastructure such as escalators and lifts, networks (electrical, telephony, plumbing), painting, and construction of the surface building will take place over the next two years.

Installation of platform screen doors in 2008
Construction of line 15 in 2023
Renovation of line 13's station in July 2022