Powerhouse represents a collaboration in the development of energy-positive buildings, and consists of the property company Entra, the entrepreneur Skanska, the environmental organization ZERO, Snøhetta architects, and the consulting company Asplan Viak.
The Powerhouse collaboration defines an energy-positive building as a building that will produce more clean and renewable energy throughout its lifespan than it uses in the production of building materials, construction, operation and demolition.
The first project realised by the collaboration partners was Powerhouse Kjørbo, located in Sandvika outside Oslo, Norway. This was the first energy-positive building in Norway, and probably the first renovated energy-positive building in the world. ZEB (The Research Centre on Zero Emission Buildings) and Enova have been important partners to realise the project.