Methamphetamine Testing in a Rental: Notice, Process and the Rules (NZ)

When can a landlord test for meth?

Methamphetamine testing is treated as a specific kind of inspection under the Residential Tenancies Act, and from 16 April 2026 the detail is set by the Residential Tenancies (Managing Methamphetamine Contamination) Regulations 2026. You are allowed to test, but the access and reporting rules are stricter than an ordinary inspection:

• At least 48 hours written notice before you enter to test during a tenancy.
• The test must be carried out at a reasonable time.
• You must give the tenant the results in writing within 7 days of receiving them, whatever the result is. This is not optional and is not "only if it is positive".

You cannot turn up unannounced, and you cannot sit on a result you do not like. The general notice rules around entering a tenanted property are covered in our guide on landlord entry without notice, and the broader inspection process is in our property inspection guide for NZ landlords.

The thresholds: 15 and 30 micrograms

The 2026 Regulations set two legal numbers, both measured as micrograms of methamphetamine per 100 square centimetres of surface (written ug/100cm2):

• Contaminated: above 15ug/100cm2. If any part of the property is above this level it is contaminated and that area needs decontaminating. Contamination is assessed room by room, so only the affected area needs to be brought back down to 15ug/100cm2 or less, not the whole house.
• Uninhabitable: above 30ug/100cm2. This is the maximum inhabitable level set in the legislation. Above it the property (or that part of it) is treated as uninhabitable.

The earlier panic-era figure of 1.5 micrograms is not the threshold and led to a lot of homes being needlessly stripped out. The Gluckman report in 2018 is what moved the science, and the 2026 Regulations are what put 15 and 30 micrograms into law.

Testing and decontamination: NZS 8510:2017 as modified

Testing and decontamination follow NZS 8510:2017, the New Zealand Standard for testing and decontamination of meth-contaminated properties, as modified by the 2026 Regulations. There are two levels of testing:

• Screening assessment. A first-pass check that any person can carry out. It is the cheaper composite screen you use to find out whether there is a problem at all.
• Detailed testing. Carried out by a qualified professional to find where the contamination actually is and how bad it is. A landlord must arrange detailed testing if the Police or the Council notify them of possible contamination, or if a screening assessment shows the property is contaminated.

Use an independent sampler and an accredited lab. Decontaminate the affected area to 15ug/100cm2 or less, again per NZS 8510:2017 as modified, before the property is re-let.

If a property is uninhabitable

If testing shows part of the property is above the 30ug/100cm2 uninhabitable level, and that part is not just a remote and inconsequential part of the property, either the landlord or the tenant can end the tenancy:

• A landlord who is not at fault gives 7 days notice.
• A tenant who is not at fault gives 2 days notice.

Whether the tenant is liable for the contamination depends on the cause. Contamination from a tenant manufacturing methamphetamine or heavy smoking can be a tenant liability, which you would take to the Tribunal with the test evidence. Pre-existing contamination is not the current tenant's problem.

Penalties

The Tribunal can make real orders here, so the paperwork matters:

• Exemplary damages of up to $7,200.
• Pecuniary penalties of up to $50,000 in some cases.
• A tenant who used the property for an unlawful purpose (such as manufacturing methamphetamine) may be ordered to pay damages of up to $1,800.

What testing does NOT let you do

• It does not let you enter without the 48-hour notice.
• It does not let you end a tenancy on suspicion alone. You need a result, and unless the property is uninhabitable under the 30ug/100cm2 rule, ending the tenancy generally needs the usual grounds.
• It does not let you withhold the result from the tenant.

Practical advice

• Test between tenancies as a baseline, so you know the state of the property before a new tenant moves in. A clean baseline test is your best protection against a later "it was already here" argument.
• Keep every test report. The notice you gave, the date, the sampler, the lab and the result are all evidence.
• Do not rely on a cheap DIY swab as Tribunal evidence. Use an accredited process and a qualified professional for detailed testing.
• If a routine inspection turns up signs of damp or staining as well, treat it separately: our guide on mould in a rental property covers that.

How RentManager handles this

RentManager records the 48-hour notice you served, the test date, the sampler and the result against the tenancy, alongside your ordinary inspections. Because the notice and the result sit in one timeline, you can produce the full chain of evidence for the Tribunal without digging through email.

See it working: open the live demo and look at the inspections list on a seeded property, where a meth test sits next to routine inspections with its notice date and result. No signup.

Frequently asked questions

Can a landlord test a rental for meth?

Yes, with at least 48 hours written notice. The result must be given to the tenant in writing within 7 days of the landlord receiving it, whether it is positive or negative.

What is the meth contamination threshold in NZ?

Since 16 April 2026 a property is contaminated above 15 micrograms per 100cm2, and uninhabitable above 30 micrograms per 100cm2, under the Residential Tenancies (Managing Methamphetamine Contamination) Regulations 2026.

Does a landlord have to share a negative meth result?

Yes. The result must be given to the tenant in writing within 7 days regardless of whether it is positive or negative.

How much notice for a meth test?

At least 48 hours written notice before entering to test during a tenancy.

Can a tenancy be ended over meth contamination?

If part of the property is above the 30 micrograms per 100cm2 uninhabitable level, and it is not a remote and inconsequential part, either party can end the tenancy. A landlord not at fault gives 7 days notice, a tenant not at fault gives 2 days notice.