Co-housing is growing in popularity with young and old around the world. There are 165 co-housing communities in the US and another 140 in the planning stages. In the UK, Older Women’s Co-Housing (OWCH) in north London has a long waiting list and there are 20 other established co-housing communities, and 40 in development. Co-housing is a long-established part of the housing mix in the Netherlands and Sweden, where communities are supported by government, and the idea is growing in Australia, New Zealand, Canada and Japan. Interest in co-housing has risen since the economic downturn and as housing costs in cities surged. Many may argue it is a lamentable trend, but closer ties with neighbors can provide an antidote to the modern epidemic of loneliness, particularly among older people. According to Stephanie Cacioppo, a professor of neuroscience at the University of Chicago, loneliness among retirees in the US is becoming an alarming public health issue. “The availability of community programs, behavioral interventions and online resources is increasing to address the problem of loneliness. Co-housing is one of these programs that gives us hope,” she says.