Agence d’urbanisme de la région de Saint-Nazaire

The Agence d’urbanisme de la région de Saint‑Nazaire (ADDRN) is an urban planning organisation based in France. Its primary mission is to develop and update territorial planning documents for the Saint‑Nazaire agglomeration. The agency provides technical expertise and advisory services to local municipalities on land‑use, housing, transportation and environmental matters. It supports the preparation of strategic plans that guide sustainable development and urban renewal projects. Through studies, surveys and GIS‑based analyses, ADDRN helps decision‑makers assess the impacts of proposed developments.

ADDRN operates within the administrative perimeter of the Saint‑Nazaire metropolitan area, collaborating closely with the city hall and surrounding communes. While the exact staff size or budget is not disclosed in the available sources, the agency is recognised as a key interlocutor for regional planning initiatives. Its work feeds into broader frameworks such as the Scot (Schéma de Cohérence Territoriale) and local PLU (Plan Local d’Urbanisme) processes. The agency also participates in inter‑institutional committees that coordinate infrastructure, economic development and environmental protection policies. In the aftermath of the cyber incident reported on 9 April 2024, ADDRN’s digital services were among those affected, highlighting its reliance on integrated information systems for planning workflows.

The organisation’s distinguishing attribute lies in its specialised focus on urban planning and territorial development for a specific coastal agglomeration. As a public planning body, it fulfills a regulatory function by ensuring that local development projects comply with national and regional planning legislation. ADDRN’s competencies include spatial analysis, public participation facilitation and the production of prospective scenarios that inform long‑term strategy. Its role became particularly visible during the 2024 cyber‑attack, when the agency worked alongside municipal services, Orange Cyberdefense and ANSSI to restore operations and assess potential data exposure. Although the incident did not alter the agency’s core mandate, it underscored the growing importance of cybersecurity resilience for public planning institutions.