In California, a new experiment fostering a collective impact network has taken shape. Since mid-2012, Housing California—a statewide nonprofit alliance for affordable housing advocates—has incubated a cross-sector network focused on reducing the overall costs of transit, housing, and energy for low-income residents of California, so that no resident spends more than 50% of their income on these necessities. The emerging network goes by its acronym THE (for Transit + Housing + Energy)—and it has early lessons to teach those seeking ways to achieve greater collective impact. In this article, we describe the formation of THE Network, including the process it followed in its first 18 months, and emerging lessons that might inform others seeking to increase their own community impact.