The History of the Leon Grosse Group
The story of the Léon Grosse Group is the story of a family business founded over a century ago in Savoie. Over the years, the company has developed into a major group. A look back at the key dates in the history of a major name in the construction industry.
2024
Foundation of the Weclad facade alliance
2021
Leon Grosse is the first construction company to be certified Great Place to Work
2021
Leon Grosse diversifies itself around 3 new divisions
2021
Launch of Léon Grosse Renewable Energies
2021
Leon Grosse celebrates its 140 anniversary
2020
Acquisition of Kyotec, specialized in architectural facades
2020
Restructuring of the Part-Dieu shopping center in Lyon
2019
Lionel Christolomme is appointed as the Chairman of the Executive Board
2018
Start of the extension of line 14, Maison Blanche station
2017
Thémis : First tertiary building compliant with France’s E+C- and BBCA low-carbon standards
2016
Delivery of the Tatutu Detention Center in Papeari, French Polynesia
2016
Launch of the Iris brand, dedicated to renovation works in occupied sites
2015
Bertrand Grosse is appointed as the Chairman of the Executive Board
2013
Jérôme Grosse is appointed as the Chairman of the Supervisory Board
2012
Delivery of Satellite Terminal 4 at Charles de Gaulle Airport and of the Jean Bouin Stadium in Paris
1999
Construction of the European Parliament tower in Strasbourg
1993
Renovation of the Grand Gallery of the National Museum of Natural History in Paris
1974
Construction of the first residential tower of the Super Italie project in Paris
1968
Léon Grosse, son of Jean, assumes leadership of the company, while his brother Bruno becomes vice president
1968
The company expands into the department store construction market
1941
Jean Grosse, son of Léon, assumes leadership of the company
1936
Tourism Pavilion for the World Fair in Paris
1927
Construction of the Salle Pleyel
1913
Construction of the Balme Bridge over the Rhône, the first reinforced concrete bridge
1901
Acquisition of the Hennebique process and expansion into Public Works activities
1881
Léon Grosse founded a small masonry company in Aix-les-Bains (Savoie)
The fresco by Léon Grosse
Discover a fresco made up of thousands of photos tracing the richness of our history.
Created by Jean-François Rauzier, this fresco is on display in the hall of our Île de France offices in Versailles.