Let’s Weed Them Out: Advice for landlords on cannabis farms

Let’s weed them out: Advice for landlords on cannabis farms

Cannabis farms are increasingly being set up in rented homes. These illegal operations can cause serious damage, attract criminal activity, and put tenants, neighbours, and landlords at risk.
This page explains the warning signs to look out for and the steps landlords can take to protect their properties.

Spot the signs of a cannabis farm

During property inspections, look out for:

Unusual behaviour
  • Lots of activity when tenants first move in
  • Tenants who act secretive, paranoid, or refuse access to certain rooms
  • Frequent visitors at unusual hours
Property changes
  • Excessive security measures
  • Windows blacked out or curtains always closed
  • Sealed letterboxes
  • Silver duct tape visible around the property
  • Ventilation equipment or a constant buzzing noise
  • Equipment hanging low from ceilings
Environmental warning signs
  • High humidity: condensation, peeling wallpaper, mould
  • Strong, unusual smells
  • Heavy use of air fresheners
  • Rapid changes in electricity usage or signs of tampering with wiring or meters
  • Bright lights on 24/7
  • Snow melting unusually quickly from the roof

If you see these signs, report concerns to the Police on 101 or anonymously to Crimestoppers on 0800 555 111.
Always call 999 in an emergency.

How landlords can reduce the risk

Before a tenancy begins
  • Complete thorough ID and reference checks (ensure ID isn’t altered or fake)
  • Be cautious of tenants wanting to move in immediately
  • Avoid accepting cash payments
  • Be wary of tenants offering long periods of rent upfront
During the tenancy
  • Carry out regular property inspections (include this requirement in the tenancy agreement)
  • Stay in contact with neighbours and encourage them to report concerns
  • Collect mobile numbers for all tenants
  • Maintain clear house numbering for reporting and police access
Property security and upkeep
  • Cut back vegetation to improve visibility
  • Use motion‑sensor or timed lighting as a deterrent

Legal considerations

If tenants are found cultivating drugs, landlords can seek possession under Section 8 of the Housing Act 1988.
Under Section 8 of the Misuse of Drugs Act 1971, landlords can be prosecuted if they knowingly allow drug production on their property.

Why cannabis farms are a serious risk

Illegal cannabis cultivation can lead to:

  • Significant repair costs
  • Loss of rental income
  • Electrical hazards, fire risks, and water damage
  • Increased insurance premiums
  • Adverse publicity
  • Decline in property value
  • Asset seizure
  • Strained relationships with neighbours

Commercial farms may also contain dangerous booby traps.

If you suspect your property is being used as a cannabis farm, do not enter. Contact the Police so trained officers can investigate safely.

Report Suspicious Activity

  • Police (non-emergency): 101
  • Crimestoppers (anonymous): 0800 555 111
  • Emergency: 999