The Family Unification Program—a U.S. Department of Housing and Urban Development initiative to facilitate interagency collaboration between the child welfare and public housing service systems—aims to stabilize families at risk for parent–child separation by addressing housing needs. Findings from a randomized controlled trial suggest that families referred to the program experienced lower risk for homelessness and out-of-home placement compared with child welfare services as usual. The findings suggest that housing services offer an effective alternative to foster care.