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Station neighbourhood of Châtillon-Montrouge

Observatory of the Grand Paris Express station neighbourhoods

The opening of line 15 Sud of the Grand Paris Express in the 4th quarter of 2026, interconnecting with metro line 13 and tramway line T6, will improve accessibility to a dense, mixed-use district with 27,700 inhabitants and 1,7100 jobs.

Aerial view of the Châtillon-Montrouge station construction site © Périphériques Marin+Trottin Architecte / 16Prod / Société des grands projets

Marked by its distance from the town centers of Châtillon, Malakoff and Montrouge, as well as by the urban divides created by the railway line, the SNCF technicenter and the Bagneux cemetery in its southern part, the district is distinguished by its social mix, thanks in particular to the diversity of its housing offer, 36% of which is social. It is also characterized by its intensity of use, driven by a large number of jobs.

Due to the density of the urban fabric and infrastructure, the level of vegetation remains low, and the supply of publicly accessible green spaces in the district is limited. Similarly, the seven development projects currently underway, all part of land consolidation operations, are relatively small and fragmented. Nevertheless, they are scheduled to create 170 new housing units, i.e. three quarters of the total area planned for the district.

Launched in 2013, the Observatoire des quartiers de gare du Grand Paris Express is a partnership tool that brings together the Atelier parisien d'urbanisme (Apur), the Société des grands projets (SGP), the Direction régionale et interdépartementale de l'environnement, de l'aménagement et des transports (DRIEAT) and the Institut national de la statistique et des études économiques (Insee) as well as the Établissement public foncier d'Île-de-France (EPFIF) and the Institut Paris Region (IPR). The aim of the observatory is to report on the urban and social transformations linked to the arrival of the metro, at the level of station districts, lines and the network.

Ten years after the first survey, a new phase of the observatory has begun. In keeping with the timetable for the start of operations, the new studies are based on the same perimeter around each station, with an 800-meter radius corresponding to the immediate area of influence covered in a 10-15 minute walk. They also include the main indicators for comparative analysis. 
Seven themes provide a fine-grained overview of current and future urban changes - Living environment - Population and jobs - Housing supply and prices - Local life, uses and new centrality - Accessibility and mobility - Environment. They are accompanied by a simple datavisualization, accessible to all from the Apur website and updated every year.

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