The proposal is structured around four pillars of transformation:
Recompose, Reconnect, Reinvest, and Remediate.

Recompose


The site's industrial identity is preserved and intensified, woven into a new urban fabric that hybridises productive and residential functions (from 50m² units for artisans to 1,500m² for mid-size companies) and encourages collaboration between private sector, educational institutions (UVSQ), and local associations.



Reconnect


New connections integrate the site into the city while prioritising soft mobility for residents. Logistics are concentrated on the northern half; general traffic is excluded and a 200-space underground car park serves the programme. Bus lines D and G are extended to the sitew while active mobility routes connect to existing networks. Two landscaped ecological corridors link the adjacent lakes.


Reinvest


Large areas are de-mineralised and new green continuities woven throughout the district. A fine network of public spaces supports diverse uses, from quiet relaxation and play to logistics and large-scale events. The interfaces with the lakes are activated with pontoons and a guinguette along the public paths.

Remediate


Polluted soils are managed on-site through bioremediation. Excavated earth is sorted: clean soil is revitalised for landscaping, contaminated soil treated and reused. Materials from deconstructed structures are salvaged and incorporated into new construction, managed from a central workshop in the renovated Usine des Communs.




This is a project that works with what is already there: the contamination, the industrial identity, the landscape of the Seine valley, the memory of a workers' city. Shifting Blueprint proposes not a fresh start but a coherent sequence of productive change: one that leaves the city of Mantes-la-Jolie with a neighbourhood that is genuinely its own.

© LLA 2026