Today, close to 70 per cent of all Canadians live in suburbs. Most bought homes early in their adult life. Most raised families. And many are now living alone or with an aging spouse in houses designed for four to six people. The kids have grown and left, so nearby schools are unsupportable, too. Even the strip malls are failing as old neighbourhoods hollow out -- as young buyers head to ever-more distant points in search of the latest "cheap" development.