Editorial explainer — prepared by the Crime Watch Canada editorial desk from the indicators police services and Crime Stoppers programs publish. Report suspicions; never investigate them yourself.
Legal or not?
Since October 2018 an adult may grow up to four cannabis plants per household for personal use under the federal Cannabis Act, except in Quebec and Manitoba, which prohibit home growing provincially. Health Canada also licenses some people to grow larger amounts for medical use. None of that covers a house converted into a production facility, a grow supplying the illicit market, or a grow that bypasses the electrical meter — those remain criminal, and they are frequently tied to organized crime.
The signs neighbours notice
- Covered windows — blinds or plastic that never open, sometimes with condensation on the inside.
- The smell — a persistent skunk-like odour, strongest at night or when vents run.
- The sound — the constant hum of fans and ballasts, and vents or ducts where a house wouldn’t normally have them.
- Power — modified meters, new heavy-duty wiring, lights that flicker in neighbouring homes, or a roof that stays free of snow and frost in winter.
- Traffic — short visits at odd hours, but no signs of daily life: no garbage out, no children, no mail collected, unmowed lawn.
- Security — cameras, guard dogs, “beware” signs and fencing out of character for the street.
Why it matters beyond the drugs
Grow houses are fire hazards. Bypassed electrical service and overloaded circuits cause house fires; humidity produces toxic mould that persists after the plants are gone; some operations are booby-trapped. Landlords are often the first victims, discovering tens of thousands of dollars in damage and a home that must be remediated before it can be occupied again.
What to do
Do not knock on the door, take photographs from the property or confront anyone. Note what you have seen and when, then call your local police non-emergency line, or report anonymously to Crime Stoppers at 1-800-222-8477. You can also send an anonymous tip through this site; we forward it to the responsible service.
