There is no set program length – length of stay is determined by individual circumstances, motivation and the severity of your Substance Use Disorder. Generally younger men require less time. There is a balance between being out of society and re joining it. The average length of stay for mature adults is 12 weeks. There is possibility for extension however residency past 24 weeks (6 months) is limited to severe cases only. There is usually an expectation that Mandated residents (MERIT & TSA) complete 12 weeks.