World Cities Report 2026: The Global Housing Crisis: Pathways to Action
The current global housing crisis is the outcome of decades of insufficient investment, rapid urbanization, economic instability, and displacement caused by conflict and disasters. Recent global estimates indicate that up to 3.4 billion people lack access to secure, safe, and adequate housing, including more than 1 billion people living in informal settlements and slums under conditions characterized by insecure tenure, overcrowding, exposure to environmental hazards, and limited access to basic services.