Police encourage landlords to be vigilant to the risks your properties are being used to commit crime.
In the 18 months up to end of June 2025 Police uncovered 187 cannabis grow houses in the Auckland Region. Unfortunately, most of these sites were rental properties. These set ups are not only illegal, but they pose a serious risk to yourself, tenants, and the wider community. We’re asking you to remain aware of the signs of illegal activity to avoid any legal or financial consequence. By working together we can all keep our communities safe.
Before tenants move in
- Reference Checks: Contact previous landlords and employers to verify tenant history.
- Credit & Income Verification: Conduct credit checks (with consent) and confirm income sources.
- Face-to-Face Meetings: Meet tenants in person when signing the tenancy agreement.
- ID Verification: Request a passport or driver’s licence and a bank statement. Photograph all documents for your records.
During the tenancy
- Ongoing vigilance is key to early detection
- Regular Inspections: Inspect the property within four weeks of tenancy commencement, then monthly.
- Neighbour Engagement: Know your neighbours and share your contact details—they can be your eyes and ears.
Warning signs
Tenant behaviour:
- Offers of extra rent or cash to avoid inspections
- Reluctance to provide ID or references
- Preference for cash payments
Property indicators:
- Strong smell of cannabis
- Covered windows or curtains always drawn
- Holes in walls or ceilings
- Presence of growing equipment (pots, fertiliser, lights, cables)
- Signs of electricity tampering or theft
- Tip: You can contact the electricity provider to confirm supply and check for irregularities.
Landlord liability:
- Insurance Risks: Claims may be denied if inspections and due diligence weren’t conducted.
- Financial Loss: Costs from fire damage, equipment disposal, and property cleaning can be substantial.
- Legal Exposure: Under the Misuse of Drugs Act, landlords aware of illegal activity may face prosecution and property forfeiture.
If you discover a grow operation:
If you discover a grow operation, do not enter the property as it may be unsafe. Call Police immediately on 105, or 111 if offenders are present. By working together, landlords and Police can help keep our communities safe.