Can Your Landlord Ban You From Smoking or Growing Cannabis in Your Ontario Rental?
Legalization gave you the right to grow four plants — but that is a right against the government, not against your landlord. What one line in your lease really decides.
Can a landlord in Ontario legally stop a tenant from smoking or growing cannabis in the rental unit?
Yes — but it turns on whether it is a new lease or an existing tenancy. On a brand-new lease, a landlord can prohibit smoking, vaping and cultivation in the unit through the Additional Terms, and it is enforceable as long as it does not conflict with the Residential Tenancies Act. On an existing tenancy where the lease is silent, a landlord cannot unilaterally add a new prohibition later without your agreement. Growing up to 4 plants per home is a right under the federal Cannabis Act (s.12(4)) — but it is a right against prosecution, not a guarantee against your landlord, and a lease term can still limit where you exercise it.
Sources: federal Cannabis Act s.12(4)–(5); Residential Tenancies Act, 2006 s.27; Smoke-Free Ontario Act, 2017 — verified against laws-lois.justice.gc.ca and ontario.ca current versions (2026-08-05).
I am Arthur Zhao. “Can my landlord actually stop me from smoking or growing cannabis in my own rental?” is one of the questions I hear most from tenants — and the honest answer is that it depends almost entirely on one line in your lease and one date on the calendar. Legalization gave you real rights, but not the ones most people assume, and not against the person who owns your unit. Here is what you can do, what your landlord can do back, and where the two actually meet.
What October 17, 2018 actually changed
When Canada legalized recreational cannabis on October 17, 2018, the Cannabis Act gave adults the right to grow up to 4 plants per household — note that is 4 per dwelling, not 4 per person (s.12(4)–(5)), so roommates share the same cap. But here is the part tenants miss: that is a right against the government, not against your landlord. It keeps you from being prosecuted; it does not hand you the right to grow or smoke inside someone else’s property.
Three questions hide inside one
“Can my landlord stop me?” is really three separate questions. Smoking or vaping is about smoke, odour and second-hand exposure. Growing is about moisture, mould and electrical load. And medical cannabis sits under human-rights law with its own rules. Bundle them into one “no cannabis” demand and you will usually get the answer wrong.
Smoking it vs. growing it
ℹ️Reality check: the most common cannabis dispute at the LTB is not growing — it is second-hand smoke drifting between units. That is judged as substantial interference, and it can be raised whether or not your lease mentions cannabis. Verified 2026-08-05.
If you just signed a new lease
Residential Tenancies Act. If you do not want to be bound, the time to negotiate is before you sign — not after you move in.If you already live there and the lease says nothing
If your lease already bans it
N5 (a first one gives you 7 days to correct it) — or an N7 for serious cases. A clause you signed at move-in is generally enforceable; the place to challenge it is whether it is reasonable or conflicts with the RTA, not whether you can simply ignore it.⚠️One thing a landlord cannot do: quietly add a no-cannabis rule to a tenancy that is already running. If your original lease is silent, a new prohibition needs your written agreement — you are not obligated to sign it.
💡 My honest read, tenant to tenant: your leverage is set the day you sign. Read Section 15 before you initial it. And even under a strict clause, remember the ban has one built-in escape hatch — a genuine medical need — and one built-in limit: a landlord still has to prove real interference or damage, not just disapproval.
Medical cannabis: when a ban has to bend
If you use cannabis for a disability or medical condition, the Ontario Human Rights Code requires your landlord to accommodate you to the point of undue hardship. In practice that rarely means “smoke anything, anywhere” — it more often means accepting a non-combustible method (edibles, a vaporizer) instead of a blanket refusal. The duty to accommodate sits above an ordinary no-smoking clause, but it runs both ways: you may have to accept a reasonable alternative that protects other tenants.
What your landlord can — and can’t — do about it
Even with no cannabis clause at all, a landlord has two real levers: persistent second-hand smoke that disturbs neighbours is substantial interference (grounds for an N5, a first one voidable within 7 days), and deliberate or negligent damage — think mould from a humid grow — can support an N5 or N7. To inspect, the landlord must give 24 hours’ written notice and enter only between 8 a.m. and 8 p.m. (RTA s.27). What a landlord cannot do is skip the Landlord and Tenant Board and force you out directly.
🚨If a landlord ever tries to force you out themselves — changing the locks, shutting off your heat or hydro, or moving your belongings to the curb — that is an illegal eviction, not a legal one. Keep paying your rent, photograph and date everything, and file a T2 (Application about Tenant Rights) with the Landlord and Tenant Board: it can order you back in and fine the landlord.
- Federal Cannabis Act (S.C. 2018, c.16) s.12(4)–(5) — 4 plants per dwelling
- Smoke-Free Ontario Act, 2017 — no smoking or vaping in common indoor areas
- Residential Tenancies Act, 2006 s.27 (entry); terms void if inconsistent with the Act
- Ontario Standard Lease Form 2229E (Additional Terms, Section 15)
- Landlord and Tenant Board (LTB) — N5 / N7 notices
📘Complete GuideFirst-Time Renter Guide →
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Frequently Asked Questions
My landlord wants me to sign a no-cannabis clause when I renew — do I have to?
No. A new term added to an existing tenancy needs your written agreement, and you can decline; under the Residential Tenancies Act a landlord cannot force it on you mid-tenancy. If you refuse, your existing terms simply continue on a month-to-month basis.
Does my lease override my right to grow 4 plants?
It can limit where you use that right. The Cannabis Act s.12(4) limit is 4 per home (not per person) and protects you from prosecution — it is not a right to grow inside someone else’s unit. A valid no-cultivation clause is enforceable, and even without one, mould or moisture damage can bring an N5.
I use cannabis medically — can my landlord still enforce the no-smoking clause?
Not as a flat ban. The Ontario Human Rights Code requires accommodation to the point of undue hardship, which usually means a non-combustible method (edibles, a vaporizer) rather than combustion in the unit. But it runs both ways — you may have to accept a reasonable alternative that protects your neighbours.
Does a no-smoking clause also cover vaping and edibles?
Only what it clearly says. A well-drafted clause names combustion and vaping; edibles produce no smoke, so a smoking ban usually does not reach them. Read the exact wording in Section 15 of your lease.
Can I be evicted just for the smell?
Only if it rises to substantial interference with neighbours’ reasonable enjoyment, and only through the LTB — usually a first N5 giving 7 days to fix it. A single passing odour is generally not enough; persistent second-hand smoke can be.
Arthur Zhao
Real Estate Broker · FRI · ABR · SRS · PSA · MCNE · E-PRO · CLHMS & GUILD Elite · REAIS
VP & Branch Manager, Bay Street Group Inc.
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