The standards (ISO 14001, ISO 50001 and ISO 9001) and environmental certifications (HQE™ LEED® and BREEAM®) enacted in Group operations provide a framework for environmental management.

To reduce environmental hazards on Bouygues Construction worksites and at locations operated by Colas, both business segments rely on environmental management systems largely based upon ISO 14001. These management systems incorporate a risk assessment and procedures by which entities can address the environmental issues relating to their particular activity.

Specific measures taken internally

The Bouygues group’s business segments have implemented their own internal environmental management systems and labels so that the environmental risks pertaining specifically to their type of activities can be better managed.

  • In 2019, Colas launched Chloé, a new digital platform for managing environment self-assessment checklists. It aims to facilitate their full roll-out to all Colas locations, and to centralise data in order to produce scorecards.
  • The internal TopSite label, initiated in 2018, continues to be rolled out to all of Bouygues Construction’s operations. It covers environmental, HR and social responsibility issues as well as innovation. 

The goal?

TopSite was created to ensure that CSR standards are properly complied with in every country where Bouygues Construction operates. The label also imposes HR and social responsibility standards on production sites, for example in terms of fighting illegal labour, customer satisfaction and the worksite’s contribution to the local economy. The scorecard applies to the building, infrastructure, and energy & services activities.

Earning the TopSite label reflects a determination to deliver excellence in every aspect of CSR.


In 2020, Bouygues Construction’s sales worldwide were covered by an ISO 14001-certified environmental management system (EMS).


of eligible worksites operated by Bouygues Construction entities had been assessed, and each continent had at least one TopSite, at end-2020.