By 2050, 68 percent of the world’s population will be living in cities, more than double the percentage reported in 1950. Urban growth has risen sharply since 2000, and many cities, London among them, are under extreme pressure to improve their long-term resilience. Metropolitan London’s population is expected to hit 9.84 million in 2031 and 10.11 million in 2036,2 giving it official designation as a megacity. The immediate challenge is to prepare not only for environmental shocks attendant with population and industrial growth and global climate change but also for the increasing infrastructure and social stresses that accompany population density. Chief among them is a lack of housing and particularly affordable housing.