Feasibility study “Implementing climate adaptation measures using blue and green infrastructures to support sustainable redensification in Bochum-Weitmar“ (Nach²Bo)

The unavoidable consequences of climate change mean there are major challenges facing municipalities, which require measures for climate protection and adaptation to climate change. Many cities must also act to relieve the pressure on housing markets, in particular through redensification. In practice, however, the concerns of climate adaptation are often pushed into the background, as the focus is on creating additional, and primarily affordable housing.

The real estate industry and the housing industry, in particular, are important new players in the field of climate adaptation: Redensification measures as well as measures to increase the energy efficiency of buildings offer fundamental windows of opportunity to implement climate adaptation measures in the housing stock.

However, there are not enough good examples for the housing industry of how to implement climate adaptation economically using blue-green infrastructures and achieve climate targets, improve housing quality and ensure housing affordability at the same time, or of how to address the competition for land use by multi-coding open spaces. The guidelines and analysis tools used so far are primarily aimed at municipalities. Assistance for the housing industry is limited to selected locations or indicators, and here in particular to urban and structural approaches. The potential for cooperation between municipalities and the housing industry, on the other hand, is rarely explored.


Within the framework of the feasibility study for a redevelopment and redensification area in Bochum-Weitmar, measures for sustainable redensification will be developed that focus on the use of blue-green infrastructures for climate adaptation, the development of alternative water resources in urban areas, and ensure flood protection.

In a subsequent step, these measures will be examined with regard to their economic, ecological and social effects, and their feasibility for the specific case will be assessed. The focus here is on the housing association as an investor.

Insights will be gained in particular a joint consideration of the already planned energetic redevelopment and redensification measures in the area and the complementary and supposedly conflicting use of blue and green infrastructures. In addition, the potentials for cooperation between the municipality and the housing industry in the context of redevelopment and redensification projects will be investigated.


1/2020 - 12/2020


  • Vonovia SE
  • Emschergenossenschaft


  • InWIS GmbH

Associated Partners

  • City of Bochum