Building responsibly
As an actor of the construction industry since 1881, we are committed every day to developing the profession of builder. It's a necessary vocation if we are to provide the city and its residents with high-quality, responsible and sustainable buildings.
Our activities
New build
Renovation & Heavy restructuring
Civil engineering and Industry
Works services
We cultivate a committed approach to construction
Driving your project
As a true pilot at the helm, we put our expert teams and in-house production at the service of the complexity of your project. As a trusted partner, we believe that the key to joint success lies in transparency and communication throughout the collaboration.
For value creation
Our teams share your objectives. At every stage, we combine our expertise to ensure that your project's budget is under control, that it is built to the highest quality, that it is environmentally efficient and that it has value for money.
And the human adventure
For 140 years, the quality of our collaborations has reflected the values we advocate. Their recurrence over time is both a testament to the bond of trust that binds us to our customers and a source of great pride.
Our key figures
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Foundation of Léon Grosse
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in projected revenue in 2025
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of private-sector customers
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of public-sector customers
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implantations
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employees
A single point of contact
As the decision-maker in his or her field, he or she is responsible for ensuring that your project runs smoothly. He or she is the link between the commercial relationship and delivery.
Technical expertise
Wherever you are and whatever the type of project, our organization enables you to capitalize on all the company's know-how. Business and product committees ensure that expertise is passed on.
A local base
Our regional organization provides you with a close relationship. Our knowledge of the players and partners guarantees the responsiveness and flexibility of a human-scale structure.
Low-carbon design
Our employees receive ongoing training on regulations, new technologies and materials. To reduce your carbon footprint, we offer our own solutions in bio-sourced materials, renewable energies and technical systems.
Feminization
We are pursuing an ambitious approach to gender equality in the workplace. Both an ideal and a powerful performance driver, we are enriching and bringing a new perspective to the profession by making our businesses more accessible to women.
Security
We offer everyone working conditions compatible with safety and well-being, particularly on construction sites. The digitalization of tools, training and awareness-raising programs have led to a steady decline in accident rates.
Authenticity
Because each individual creates a unique story, we encourage simplicity in relationships. We create a friendly working environment with all our stakeholders.
Accessibility
The strength of our human-scale organization lies in the ease of access to management and the resulting agility in handling your project. Whatever the size of your project, our team is always ready to listen.
Transparency
Convinced that communication is a key factor in the success of your project, we keep you informed of every detail. A perfect understanding in the service of a privileged spirit of partnership.
Our offers
Energy renovation
Reduce your costs, reduce your carbon footprint and comply with regulations by renovating your buildings without disrupting their activity.
Our range of in-house skills and partners will provide you with the most appropriate solutions for your project: technical equipment, façades, bio-sourced materials and renewable energy production solutions.
Low-carbon design
Improve the environmental impact of your projects with a committed partner.
Our in-house expertise in the circular economy, our own low-carbon concrete solutions, bio-sourced materials, renewable energy production (photovoltaic, biomass and geothermal) and wood façades are all skills we have mastered to meet your environmental, regulatory and economic challenges.
Renovation on an occupied site
With IRIS, our brand dedicated to residential renovation, you can improve energy performance and tenant comfort with complete peace of mind. Communication, personalisation and support are our watchwords.
Civil Engineering
Léon Grosse Construction is a leading player in 9 main areas of civil engineering: hydraulic engineering, industrial buildings, wastewater treatment, mobility infrastructure, nuclear power, engineering structures, mountain structures, parking lots and underground works.
We design, build and renovate structures of all sizes to meet the needs of a diverse customer base.
Electricity and maintenance
Léon Grosse Électricité Maintenance (LGEM) specialises in high and low voltage electrical work and multi-technical maintenance in the Paris region.
Our locations
Des équipes dédiées
Our centralised management structure and our regional, local (such as our functional works agencies) and specialist (such as SNEP, our agency specialising in vineyard construction) agencies mean that we can be at your side for all types of work. With our dedicated teams and a single point of contact for each project, we're always ready to listen to your needs.
Our fundamentals
Technical Department
Our technical departments incorporate engineering skills in all building trades. As a guarantee of reliability, we are able to offer our expertise to meet the complexity of your projects.
BIM
We use Building Information Modeling at every stage of your project: feasibility, design, technical synthesis, construction site and operation, ensuring that your project is well coordinated in every detail.
QSE/LEAN
Our QSE and Lean approach focuses on maintaining optimum productivity levels while meeting a dual objective: guaranteeing the physical integrity of people and controlling the impact of site activities on the environment.
Certifications
Awards
Golden Key 2021
National Golden Key + 2 regional Golden Keys (IDF/Aura) + 1 special mention (Hauts-de-France).
Golden gesture
Award-winning approach to value creation through Design Thinking.
Equerre d'argent
Equerre d'argent awarded to the CREM Paris 13 project for its architecture in the "Habitat" category.
Batiactu 2023 Construction Awards
Renovation of multi-family housing" award: Renovation of the Dhuys and Stade residences in Clichy-sous-Bois.
Readers' Favourite Award: Renovation of the Clos des Lambrays heritage site.
Batiactu 2024 Construction Awards
We are proud to see the Batiactu Construction Trophy won by the SNEP teams and their partners for the Château de Meursault renovation project in the “Crafts & Heritage" category.
Our references
Join us
Leon Grosse, a company on a human scale
Take a look at our job offers and apply!
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