Building retrofit in shrinking and ageing cities: a case-based investigation

[1 ]Institute for Infrastructure and Resources Management, Leipzig University, D-04109 Leipzig, Germany

[2 ]Faculty of Architecture and Urban Planning, University of Applied Sciences Erfurt, D-99089 Erfurt, Germany

[3 ]Department of Urban and Environmental Sociology, Helmholtz Centre for Environmental Research – UFZ, D-04318 Leipzig, Germany

[4 ]Sustainability Management and Infrastructure Economics, Fraunhofer Center for International Management and Knowledge Economy, D-04109 Leipzig, Germany