Small prefab homes have come a long way from the days of Sears Catalog —and they may just hold the answer to many of our modern housing woes, including the need for affordable and sustainable living spaces . “Building a home in a factory environment gives the fabricator better control over the end product and improves management of the resources used in construction,” says Avi Friedman, a professor of architecture at McGill University and author of Pre-Fab Living . “In addition, I found out that a significant amount of time can be saved on site, which can also contribute to cost reduction.” The selection and available types of prefabricated homes has expanded in recent years as architects and builders take advantage of new technology. “If the world of prefab is divided in two, one is the modular [type] that gets delivered entirely on-site,” says Daniel Lopez-Perez, cofounder of Polyhaus .…