City of Mostar
Regional Education and Information Centre for sustainable development in South East Europe (REIC)
Institute of Urban and Regional Development
Habitat Macedonia
Nadacia Habitat for Humanity International
Habitat for Humanity Bulgaria
German society for solar energy section Berlin Brandenburg
Free and Hanseatic City of Hamburg – Ministry of Environment and Energy; General Directorate of Nature Conservation, Landscape Architecture & Energy Division; NGE1 Landscape Planning and Urban Green
Hungary Green Building Council (HuGBC)
Polish Green Building Council (PLGBC)