Report regarding state-of-the-art solutions and future options in the area of sustainable energy for buildings. This report is part of WP3 Roadmapping Smart Buildings of the R4E project.

In the Roadmaps for Energy (R4E) project, the partners will work together to develop a new energy strategy: their Energy Roadmap. The difference between the regular energy strategies and action plans and these new Energy Roadmaps is the much earlier and more developed involvement of local stakeholders. This report (D3.1) contains the results of the desk study activities regarding state-of-the-art solutions and future options in the area of sustainable energy for buildings from January 2016 to April 2017.