How Long Does Rehab Take in New Zealand?

How long does rehab take? The honest answer is: it depends on you. Residential rehab programmes in New Zealand usually run for 2 to 8 weeks, while outpatient programmes usually last around 4 to 8 weeks. Rehab isn’t a one-size-fits-all process; your timeline will depend on what you’re working through, how long you’ve been struggling, and the kind of support you need to stay well.

At Clinic 77, we’ve seen people find real, lasting recovery in as little as 4 weeks. We’ve also worked with people who needed 6 months to properly reset. Both timelines are valid. 

A Simple Guide:

• Medical detox: 5 to 10 days for alcohol, up to 2 weeks for some drugs.

• Residential (inpatient) rehab: 4 to 8 weeks on average, up to 3-6 months for extended stays.

• Outpatient rehab: around 4 to 8 weeks, with ongoing review.

• Aftercare and relapse prevention: open-ended, with an open-door policy.

• Your timeline: shaped by a full DSM-5 assessment and tailored to your situation.

How Long Does Rehab Take for Drug and Alcohol Addiction?

There's no single answer to how long rehab takes, because addiction looks different for everyone. Some people need a short, intense reset. Others need months to unpack the trauma behind their use.

A proper assessment is the starting point. At Clinic 77, every treatment plan is built from a two-part DSM-5 assessment, which helps us match the length and intensity of treatment to what you’re dealing with.

If you’re working through co-occurring conditions like anxiety, depression, or PTSD, your rehab journey will usually be longer than someone addressing alcohol dependency alone. The factors that shape how long rehab takes include:

• The substance (or substances) involved

• How long you’ve been using

• Whether there’s trauma or mental health issues underneath

• Your home environment and support network

• Whether you need medical detox before treatment

How Long Does it Take to Detox from Alcohol?

If you’re asking how long does it take to detox from alcohol, expect the physical side of withdrawal to run 5 to 10 days. Mild symptoms can start within 6 to 12 hours of your last drink. They usually peak around day 2 or 3, then ease off over the following week.

For some people, it takes longer. Protracted symptoms like mood, poor sleep, and anxiety can linger for weeks. This is why medical detox under proper supervision is so important. Alcohol withdrawal can be dangerous, and managing it alone is not something we recommend.

Detox from other substances varies. Opioid withdrawal usually runs 5 to 10 days, while Benzodiazepine withdrawal can take weeks and needs careful medical oversight. Methamphetamine withdrawal is more psychological than physical, and often merges straight into the early weeks of treatment.

Detox is the first step, not the whole journey. It clears your system, but the real recovery work starts afterwards.

How Long Do Residential Programmes Last?

Our 4 to 8 week residential programme gives you enough time to step out of daily life, work closely with a clinical team, and build the foundations for lasting change. For more complex situations, such as severe dependence, co-occurring trauma, or repeated relapse, extended stays of 3 to 6 months are available.

We also offer shorter respite stays of around 5 days, which can be useful if you need a reset, but aren’t ready to commit to a full programme yet. During a residential stay, your week is built around one-on-one therapy, group work, 12-step meetings, reflective practices and exercise.

How Long Do Outpatient Programmes Last?

If you need to keep working or caring for family, outpatient rehab lets you get help without stepping out of your life. Our 4 to 8-week outpatient programmes cover addiction, trauma, anxiety, depression, prescription medication dependency, and family support, all delivered online, in person, or as a combination of both.

Outpatient isn't a lesser form of residential care. For the right person, it's just as effective and lets you put new skills into practice in real life as you learn them.

What Happens After Rehab?

Now that you have an understanding of how long rehab takes, what happens once you’ve completed the programme? Rehab doesn’t end at week 8. Recovery is a long-term process, and the weeks and months following treatment matter as much as the programme itself.

That's where aftercare and ongoing support come into the picture. Rehabilitation centres like Clinic 77 offer regular check-ins, relapse-prevention groups, and an open-door policy so you can return whenever you're feeling fragile.

You can explore our full treatment pathway to see how assessment, treatment, and aftercare fit together.

Ready to Talk?

If you’re wondering how long it takes to detox from alcohol or how long rehab programmes last, the next best step is a conversation. We’ll walk you through what treatment could look like, how long it might run, and what options make sense for you or someone you love.

Get in touch with Clinic 77. We’re based in Auckland and work with clients across Auckland and throughout New Zealand through our online outpatient programmes.