According to the World Bank and numerous think tanks, the world’s cities will become increasingly urbanized in coming decades, with accompanying challenges in finding affordable housing. A report by the McKinsey Global Institute predicts that 1.6 billion people worldwide will either be "financially stretched by housing costs" or be living in "crowded, inadequate, and unsafe housing."

McKinsey defines affordable housing as that requiring no more than 30 per cent of income. Small, temporary, modular homes are one potential solution. Tim McCormick, a product designer in Palo Alto, California, has devised a concept he calls “Houselets,” described as “simple, mobile, modular building in available space.” The term…