Our expertise

Our business: a global turnkey real estate offer

GSE has been the reference turnkey contractor on the corporate real estate market for over 35 years. As such, we assume all the risks inherent in your project by making contractual commitments in terms of price, deadline and construction quality.

To ensure the best possible support, in addition to turnkey design-construction or renovation, our offer includes services upstream and downstream of your projects, with a constant commitment to a consistent guarantee level.

A global offer and a single contact to assist you at all stages of your project


  • Land search
  • Financial and legal arrangements
  • Definition of project characteristics
  • Technical and architectural design
  • Search for optimisation (technical, economic)
  • Administrative procedures
  • Certification measures
  • Quality/safety initiatives
  • Turnkey operations
  • Operation and maintenance support


GSE allows its clients, whether major international corporations or SMEs, to outsource the risks inherent in any construction project and focus on their core business.


The Turnkey Contractor activity is adapted to all types of professional real estate: logistics platforms, plant, production facilities, research centres, laboratories, industrial buildings, retail premises, offices, services and leisure infrastructures, etc.

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