City of Saint-Nazaire

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energy savings

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inhabitants

The City of Saint-Nazaire has embarked on an ambitious path to improve the environmental performance of its public buildings and reduce energy consumption. To achieve its goals, it has enlisted E’nergys to renovate the Jules Simon and Jean Jaurès schools.

The benefits.

Following the implementation of our solutions, the city of Saint-Nazaire has observed tangible results:

Energy savings

Expected energy gains: 40% for Jules Simon School and 50% for Jean Jaurès School Complex

Lower environmental impact

Integration of renewable energy, rainwater harvesting systems, and bio-based materials

Greater user comfort and well-being

Modernized, brighter, healthier, and more pleasant buildings for users

Regulatory compliance

Achievement of the Tertiary Decree objectives

E’nergys provides us with tailored technical support in enhancing the energy and environmental performance of our renovation and construction projects as part of our ecological transition. Their role as both a project management coach and a third-party mediator ensures optimal environmental and energy outcomes. Moreover, their wide-ranging expertise has allowed us to grow and strengthen our internal capabilities.

Céline Bioret

– Ecological Transition Project Manager

Delivery

2026

Sector

Public

Municipal surface area

4 815 ha

Background.

Committed to reducing its energy consumption by over 25% between 2015 and 2030, the City of Saint-Nazaire has made energy renovation a cornerstone of its urban policy.
Driven by the Tertiary Decree, the municipality is investing in the modernization of its public buildings to combine energy efficiency, user comfort, and environmental excellence.

Two flagship projects embody this approach:

the renovation of Jules Simon School,
and the transformation of the city’s largest school complex, Jean Jaurès.

Goals

The City of Saint-Nazaire called upon E’nergys to:

Reduce the city’s energy consumption by 25% between 2015 and 2030

Comply with the Tertiary Decree targets

Minimize the city’s environmental footprint

Our response

E’nergys is supporting the design and construction of a new school canteen at Jules Simon School, built with a timber frame and bio-based materials. The project also includes:

Greening of the schoolyard to reduce the heat island effect,
Rainwater recovery systems for use by the city’s gardeners,
Installation of a photovoltaic power plant on the kindergarten roof.

At Jean Jaurès School, the project involves the renovation of 8 buildings and the redevelopment of 10,000 m² of playgrounds, including soil dewatering and greening. It also includes the creation of open galleries replacing the old covered areas, as well as rainwater tanks and solar panels.