52072 Aachen-Laurensberg: "Solarsiedlung Teichstraße", 43 residential buildings in 27 terraced houses and 16 semi-detached houses, as well as two office buildings in passive house standard, on 2.5 hectares of land; partly wood pellet heating, 60 % coverage via solar thermal collectors, PV system or geothermal system. Completion: 2003