Green-Blue Urban Adaptation Projects Raise Housing Prices 13% Risking Displacement

A study published in Nature Cities analysing two decades of satellite imagery and socio-economic data from 5,503 cities and towns across 32 African countries found that green-blue climate adaptation projects, including urban parks, restored wetlands and integrated flood management, raised housing prices by 13 per cent in affected neighbourhoods and were associated with population growth of approximately 53 per cent. Researchers warn this unintended gentrification effect risks displacing the low-income communities that climate adaptation is intended to protect.

The study, led by researchers from the Korea Advanced Institute of Science and Technology, Peking University and New York University in China, uses satellite data to identify where green-blue projects appeared and links socio-economic data to track how local communities changed over time. In cities including Johannesburg, Addis Ababa and Nairobi, weak and fragmented regulations increased the risk of displacement. Rising housing prices, higher household incomes, increased consumption levels and significant population growth were identified as consistent markers of early-stage gentrification following climate adaptation investment.

The paradox identified in the study is that nature-based adaptation solutions improve flood protection, reduce urban heat and enhance local environments, making neighbourhoods more desirable and therefore less affordable for the residents most vulnerable to climate impacts. This concentration of climate adaptation benefits for wealthier incoming populations while longer-term residents are priced out is described as an urgent governance challenge, particularly as Africa's urban population is set to double from 700 million to 1.4 billion by 2050 with more than two-thirds of this growth concentrated in major cities.

The researchers recommend pairing climate adaptation projects with early social safeguards including affordable housing measures, tenant protections and community participation mechanisms to prevent displacement before it occurs. International funders and national governments are urged to include strong social safeguards in climate finance conditionality. The study notes that careful inclusive planning allows climate investments to support both environmental sustainability and social justice, while insufficient planning risks converting climate action into a driver of greater inequality. The broader learnings may also apply to urban areas in parts of Asia and Latin America, with outcomes depending on local land tenure, housing affordability and planning capacity.

Key figure — 13% rise in housing prices following green-blue adaptation projects