Supportive Services Only (SSO)Supportive Services Only (SSO) projects allow recipients to provide supportive services—such as conducting outreach to sheltered and unsheltered homeless persons and families and providing referrals to other housing or other necessary services—to families and individuals experiencing homelessness. The recipient may only assist program participants for whom the recipient or subrecipient of the funds is not providing housing or housing assistance.HUD Exchange: Supportive Services Only (SSO) OverviewProgram EssentialsQuick GuideKnowledge BaseOnline Training