This article evaluates the impact of housing assistance on the post-release pathways of people convicted of sex offences, in terms of a range of criminal justice outcomes and associated costs. Using linked administrative data from New South Wales government agencies, it compares outcomes and costs for two groups of formerly incarcerated sex offenders – one group who received public housing tenancies at some stage after their release, the other who only received private rental assistance. We find the public housing group had better criminal justice outcomes (e.g. fewer police incidents, court appearances, proven offences, days in custody and days on community-based orders) than the non-public housing group, achieved mostly at less cost to governments. The evidence, likely applicable in other jurisdictions with similar housing systems, strongly supports the increased provision of social housing to this group of ex-prisoners and, we hope, helps disarm the controversy that affects this area of policy in Australia and internationally.