In each country a specific renovation challenge has been formulated, in line with the national focus in the NeZeR project. There were different options for the competition, depending on the availability of renovation projects in each city:
- A contest between existing already renovated cases
- A competition on new Nearly Zero Energy Building Renovation designs
The planning of the competitions has been assisted by the Dutch social housing association Portaal who will share their experience with other participating countries. Portaal organized a very successful Dutch competition aiming at Zero-Energy-Bill houses for social housing, the Nianesto competition (www.nianesto.nl). The target of the Nianesto competition was to prepare a design for a new house that would have a zero energy bill.