- Provincial outdoor fire rules apply in Northwestern, Northeastern and North-Central Ontario, and elsewhere you need to check municipal bylaws.
- Fire season runs April 1 to October 31, and a permit is generally required to burn wood, brush, leaves or grass unless all conditions are met.
- Smoke or odour can be a private nuisance only if the interference is substantial and unreasonable.
- The duty to stop a nuisance falls on the party creating it, not the victim.
Smoke drifting through your windows from a neighbour's backyard fire, or the smell of cannabis on your balcony, can make time at home unpleasant. It is hard to know whether you have any legal footing, and which rules even apply where you live.
This article explains how Ontario's outdoor burning rules work at a high level, why your municipality's bylaws often matter most, and how nuisance law looks at smoke and smell. It is general information, not advice on your situation.
Which burning rules apply where you live
Ontario's outdoor fire rules, under the Wildland Fire Management Act and O. Reg. 43/26, apply in Northwestern, Northeastern and North-Central Ontario. In other parts of the province, you should check municipal bylaws.
That means that for much of southern Ontario, your municipality's own rules on open-air burning, fire pits and fire bans are the first thing to look up. They vary, so call your municipality or fire department, or check its website.
Fire season and permits
In the areas the provincial rules cover, fire season runs April 1 to October 31. A permit is generally required to burn wood, brush, leaves or grass unless all of the stated conditions are met.
The no-permit conditions apply to pile burning. They are listed in the table below, and incorporated municipalities may impose additional conditions or permits.
| No-permit pile burning condition | Requirement |
|---|---|
| Start time | No earlier than 2 hours before sunset. |
| Extinguish by | No later than 2 hours after sunrise. |
| Number of piles | One pile at a time. |
| Size | Under 2 metres in diameter and height. |
| Distance | At least 2 metres from flammable materials. |
| Supervision | Tended until out. |
These conditions describe pile burning of material like brush. They do not tell you whether a backyard fire pit is allowed where you live. That depends on local bylaws.
Smoke and odour as a private nuisance
Whatever the bylaws say, you may also have a private nuisance claim if the smoke or smell interferes with your use or enjoyment of your home. The interference must be both substantial and unreasonable. Reasonableness depends on the circumstances, including locality, and factors include malice, frequency, duration and time of day.
- An occasional campfire on a summer evening may not be substantial.
- Smoke every night that forces you to keep windows shut may weigh differently, because frequency and duration matter.
- Burning late at night may be viewed differently from burning in the early evening, because time of day is a factor.
- Smoke that seems aimed at you deliberately may raise the question of malice.
In an Ontario noise nuisance case, the Court of Appeal upheld a permanent injunction and held that the obligation to abate a nuisance falls on the party creating it, not the victim. The case was about noise, but the idea applies in the same way to anyone creating a nuisance.
What about cannabis odour?
How cannabis odour is treated depends on the facts, your building and your municipality, so it is worth confirming with a lawyer. Other rules may also apply, such as condo declarations and rules, rental lease terms and municipal bylaws. Those depend on your building and municipality, so read your own documents and speak to a lawyer if you are unsure.
If you live in a condominium or rental building, the first route is often the property manager or landlord, who can enforce the building's rules.
What to do next
- Keep a log with dates, times, how long the smoke or smell lasted and how it affected you.
- Take photos or videos where it is safe to do so, and note the weather and wind if relevant.
- Check whether you are in an area covered by provincial fire rules, and if not, look up your municipality's burning bylaws.
- Talk to your neighbour calmly. They may not realise how far the smoke travels, and they may agree to change timing or location.
- If it continues, contact your municipality's by-law office or fire department about the burning rules.
- If the problem is serious and ongoing, speak with a lawyer about whether it is a substantial and unreasonable interference.
If there is a fire that looks out of control, or a danger to people or property, call 911 rather than relying on any of the steps above.
Frequently asked questions
Can my neighbour burn leaves or brush in Ontario?
It depends on where you live. In the areas covered by provincial rules, a permit is generally required to burn wood, brush, leaves or grass unless all conditions are met. Elsewhere, municipal bylaws apply.
Is a backyard fire pit allowed?
The provincial no-permit conditions describe pile burning, and incorporated municipalities may add conditions or permits. Whether a fire pit is allowed in your area depends on local bylaws, so check with your municipality.
Can smoke or smell be a nuisance in law?
Yes, if the interference with your use and enjoyment is both substantial and unreasonable. A court considers locality, malice, frequency, duration and time of day.
Who must stop a nuisance, me or my neighbour?
In a noise nuisance case, the Court of Appeal held that the obligation to abate a nuisance falls on the party creating it, not the victim. You are not generally expected to solve the problem for them.
Sources
- Smith v. Inco Limited, 2011 ONCA 628 — ontariocourts.ca
- 1386444 Ontario Inc. v. 2331738 Ontario Ltd., 2022 ONCA 416 — ontariocourts.ca
- Ontario.ca – Outdoor fire rules and permits — ontario.ca
Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.
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