Project scope
Plan: The 34-hectare zone includes the Places Hautes and Méridien sectors of Grande Borne, an area extending northeast to the Buffle–Autruche–Pégase school group and Amédée Gordini T12 tram stop, and a mixed housing-and-economic-activity strip between RD 445 and route de Fleury. Planned works include demolishing 414 residential units on the Places Hautes slab and building about 375 new homes, shops and activity space; demolishing the southeast gable of Grand Méridien and its ten homes to extend rue Toussaint Louverture; and remaking public spaces and streets. RD 445 is to be reconfigured as an urban boulevard with two traffic lanes in each direction, a central TZen 4 corridor, bidirectional cycle facilities and planted stormwater swales. The project also refers to rehabilitation of 480 Méridien homes, but the opinion says the dossier does not consistently or comprehensively include rehabilitation and residentialisation of retained buildings; those landlord-led operations are not fully described in the project impact assessment.
Reported status and procurement
- Reported development
The opinion reports that demolition of the Place de l’Oiseau and Place de la Treille sub-sectors (187 homes) was planned for 2025–2026 and had begun; demolition of Place aux Herbes and Place du Quinconce (227 homes) was planned from 2028. These are report-date schedules, not confirmation of current progress.
- Procurement availability
- Unknown / not established
Reported regulatory context
The ZAC was created by prefectural order on 18 March 2024 after public consultation. An environmental authorization process, including review under water legislation, was still being examined when the environmental-authority opinion was issued.
A source report alone does not establish current progress or an open buying window.
Project summary
An environmental-authority opinion adopted on 25 September 2025 describes the ZAC Grande Borne Ouest, a 34-hectare urban renewal and mixed-use project in Grigny and Viry-Châtillon. Grand Paris Aménagement is identified as its development authority. The plan combines housing replacement, commercial and economic uses, public-space and street works, and transport-related infrastructure.
The opinion reports that the ZAC was created by prefectural order on 18 March 2024, while environmental authorization was still under examination when the opinion was issued. Its review also notes that the project dossier did not fully cover rehabilitation and residentialisation of retained buildings, and that several ecological design and monitoring details remained insufficiently specified.
Evidence limits and unknowns
The opinion does not establish the outcome or date of the environmental authorization; it reports that the process was still under examination when issued on 25 September 2025.
The final scope, schedule and assessed impacts of rehabilitation and residentialisation of retained homes remain unclear in the opinion; it notes incomplete project coverage and differing descriptions of rehabilitation.
The opinion identifies outstanding detail on planting choices, ecological functions and monitoring of proposed measures.
The demolition schedules in the opinion are report-date plans, not confirmation of current progress.
