# ZAC Grande Borne Ouest
Publisher: CapexCue
Canonical dossier:
Dossier reference: release 1 (18c6e113-4b57-453d-92c7-686cc80e5473)
Released project intelligence
Oldest supporting observation: 2026-10-04T12:10:44.781460+00:00
Dossier released: 2026-10-16T06:56:35.279051+00:00
Source report dates and capture dates are listed per fact below; neither establishes an event date.
## 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.
Current purchasing availability: unknown.
Source-dated plans do not establish current progress or available supplier packages.
## Project metadata
Country: France
Region: Europe
Physical assets: Not classified
Derived from the exact released evidence; unresolved fields remain unclassified.
## Project category
Social infrastructure
Derived from the reviewed scope statement; delivery stage remains unclassified.
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.
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
Project overview
Oldest decisive evidence: 2026-10-04T12:10:44.781460+00:00
Newest evidence: 2026-10-04T12:10:44.781460+00:00
Knowledge reviewed: 2026-10-16T06:56:33.030505+00:00
Publication reviewed: 2026-10-16T06:56:33.030505+00:00
## Name
ZAC Grande Borne Ouest
Status: reported
Attribution: IGEDD/Ae own dated environmental opinion with attributed project dossier facts
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
## Scope
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.
Status: planned
Attribution: IGEDD/Ae own dated environmental opinion with attributed project dossier facts
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
## Ecology
The plan includes increased planting, permeable areas, planted swales and an intended ecological connection toward the Sapinière. The environmental authority says that planting choices, ecological functions and implementation and monitoring details remain insufficiently specified.
Status: planned
Attribution: IGEDD/Ae own dated environmental opinion with attributed project dossier facts
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
## Activity
Urban renewal and mixed-use development, combining housing replacement, commercial and economic activities, street and public-space improvements, and transport-related infrastructure.
Status: planned
Attribution: IGEDD/Ae own dated environmental opinion with attributed project dossier facts
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
## Delivery
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.
Status: reported
Attribution: IGEDD/Ae own dated environmental opinion with attributed project dossier facts
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
## Location
Grande Borne, in Grigny and Viry-Châtillon, Essonne (department 91), Île-de-France, France; the site is about 30 km south of Paris, beside the A6.
Status: reported
Attribution: IGEDD/Ae own dated environmental opinion with attributed project dossier facts
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
## Regulatory
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.
Status: reported
Attribution: IGEDD/Ae own dated environmental opinion with attributed project dossier facts
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
## Implementing Agency
Grand Paris Aménagement is identified as the aménageur (development authority) for the ZAC.
Status: reported
Attribution: IGEDD/Ae own dated environmental opinion with attributed project dossier facts
Source: IGEDD environmental authority native opinion text — https://www.igedd.developpement-durable.gouv.fr/IMG/pdf/2_-_creation_de_la_zac_de_la_grande_borne_ouest_a_grigny_et_viry-chatillon_91__cle516f41-1.pdf | published unknown | observed 2026-10-04T12:10:44.781460+00:00
## Cite this dossier
CapexCue — ZAC Grande Borne Ouest — dossier released 2026-10-16T06:56:35.279051+00:00, release 1 (18c6e113-4b57-453d-92c7-686cc80e5473) — https://capexcue.com/projects/zac-grande-borne-ouest-bc6235425fc62a37/.
For current information and later dossier updates, visit .
This file records the release identified above; the current dossier may change.