Headquarters of an international organisation

The construction of a new building made it necessary to extend the site. This new strategy offers the long-term advantage of consolidating all headquarter activities in three buildings instead of ten. They will be housed in new or completely renovated premises, which will improve the efficiency of daily operations and significantly reduce maintenance and energy costs.

The new extension has a surface area of approximately 23,000 m2 and will include flexible office space (individual or open space), a restaurant, a large modular conference room and an independent area designed to handle global health emergencies (SHOC-room).

The target in terms of energy performance is HPE-equivalent to the Minergie® label for the performance of the thermal envelope. Working off the energy resources available on the site and the territorial energy concept, we proposed a set of variants that adhere to the Energy Act. We involved the client in this technological decision regarding heat production: a heat network or on-site production with geothermal probes.

In order to offer the client a digital model containing the main information of the building so as to facilitate the future optimisation of its maintenance, a coordinated BIM for the CVCSER was followed by the various contractors and A+W from the very first phases of the project.

FREI Guillaume

FREI Guillaume
Responsable du département Electricité
A+W Geneve


Expert Senior
A+W Holding


Project owner

International Health Organisation


BBK - Berrel Berrel Kräutler, Zürich

General contractor

Implenia, Geneva

Facts and Figures

  • CVC
  • Sanitary
  • Electricity
  • Building automation
  • Fire safety
  • Building physics
  • Acoustics
  • Dynamic flow simulation
  • BIM technical coordination
23,000 m²
Total surface area
Start of the project
800 kW
Heating capacity
700 kW
Cooling capacity
200'000 m³/h
Air flow
SIA phases