
A collapse in US subprime mortgages from 2007 cascaded into a worldwide banking crisis and the deepest recession since the 1930s, peaking with the failure of Lehman Brothers in September 2008. Mass foreclosures emptied recently built suburbs, megaprojects stalled, construction collapsed and many governments turned to austerity. The crisis exposed how deeply housing finance and securitised mortgages had become embedded in the global economy and in urban development. Recovery was uneven and prolonged, with house prices and building slow to return in many regions.
It ended a long real-estate-led building boom and exposed financialised housing as a central driver of urban form and inequality. It also fuelled the Occupy movement and a lasting politics of housing affordability that reshaped urban debate.