Rehabilitating former industrial sites is a key issue for many cities, and Valby, a district of 46,000 people in the south-western part of Copenhagen, is no exception.
 

The CONCERTO-area in Salzburg is situated in the city district of Lehen, a centrally located city district with a very high population density. This area mainly consists of multi-storey apartment houses, which were built between 1950 and 1970. The structure of this city district has changed fundamentally over the past years: The soccer-stadium was demolished, business-parks were abandoned and small stores moved to the big shopping-centres or closed.

The Swedish community of Falkenberg with 40.000 inhabitants is one of the leading and most ambitious municipalities regarding re-generative energy systems. Falkenberg aims to cut its energy consumption of 1/4 within the CONCERTO core area, by using different techniques of Energy Efficiency (EE) and new methods of clean energy production.

The city of Neckarsulm is a city in northern Baden-Württemberg and part of the district Heilbronn. It has an approximate population of around 27,000 inhabitants and is regarded as one of the cities with the highest density of solar thermal- and PV systems in Germany.

Zlín is a largely industrial city with a population of around 76,000 inhabitants. Its suburb, Louky, with around 1,600 inhabitants, is the principal focus area of CONCERTO measures. 92 m² area of solar thermal systems for combined heating and Domestic Hot Water (DHW) for 20 single-family houses and 268 m² large-scale applications for multi-family houses, or communal baths, represents an increase in the use of energy from RES. This is complemented by 7 photovoltaic (PV) systems in private family houses (5 kWp each) and three large-scale PV systems (40, 200 and 470 kWp).

The Weiz-Gleisdorf community is a co-operation between 17 villages and the two cities, Weiz and Gleisdorf in East Styria in the south of Austria. The community has the highest density of solar thermal and photovoltaic systems in Austria. It received two times the European Solar Energy award.