Your Tenant Pulled the Battery Out of the Smoke Alarm — Are You, the Landlord, on the Hook? Ontario’s Ongoing Fire Code Duty
Installing to code on day one isn’t the finish line — it’s the first link in a duty that runs the whole tenancy. Here’s what you actually owe during the lease, and how liability splits when a tenant disables the alarm.
My tenant is the one who disabled the alarm — so when the fire marshal comes knocking, who actually gets charged, and does my responsibility end there?
Both of you can be charged — and no, your responsibility does not end with the tenant. Disabling an alarm is an offence for whoever does it: 6.3.3.6 says no person shall disable a smoke alarm, so a tenant who pulls the battery is personally exposed to prosecution under the Fire Protection and Prevention Act (FPPA) s. 28 — up to $50,000 for an individual’s first offence. But that sits beside a second duty that is fixed on you and cannot be handed off. The Fire Code (O. Reg. 213/07) treats only the landlord as the alarm’s owner — 2.13.1.2 and 6.3.3.2 both define “landlord” to exclude the tenant outright. So when an investigator arrives, the tenant’s battery-pulling gets one line of inquiry; whether you installed, tested and maintained the alarm gets its own. Pointing at the tenant closes neither. That is the trap: the tenant being at fault is not a defence you get to stand behind.
Sources: Ontario Fire Code, O. Reg. 213/07 (under the FPPA, 1997), ss. 2.13.1.2, 6.3.3.2, 6.3.3.6; Fire Protection and Prevention Act, 1997, S.O. 1997, c. 4, s. 28 (current e-Laws consolidation, verified 2026-08).
I’m Arthur Zhao. Here’s the phone call no landlord wants: a small kitchen fire, everyone got out, and now the insurer’s adjuster is asking one quiet question — was the smoke alarm working? You call the tenant, who says, almost casually, “Oh, that thing kept going off, so I took the battery out a few weeks ago.”
In that moment a lot of landlords reach for the obvious defence: the tenant disabled it, so it’s on them. It feels airtight. It isn’t. Ontario’s fire law is built the opposite way from that instinct — keeping the alarm working is legally your job, while disabling it is something the law forbids anyone, tenant included, from doing. This piece walks through what you actually owe during the tenancy, how the blame really splits when a battery goes missing, and the paper trail that decides how exposed you are.
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The duty didn’t end when the alarm went up
Plenty of landlords treat fire-alarm compliance as a day-one task: mount the smoke and CO alarms, get them all in the right spots, done. Installation is the start — but the Fire Code never asked for “installed and forgotten.” It asks for the alarm to be kept working, for the entire tenancy.
That is exactly what separates this from the buyer-side, home-inspection view of alarms: an inspection is a snapshot of one moment in time. This is a continuous loop that runs the length of the lease — install right, hand over the instructions, test on schedule, respond when the tenant reports a fault. Break any link and the duty isn’t satisfied, no matter how flawless the original install was.
The Fire Code makes only the landlord the “owner” — and you can’t sign that away
The Code is blunt about who carries the duty. Section 2.13.1.2 says that in a rented residential unit, only the landlord is treated as the alarm’s owner — and it defines “landlord” to expressly exclude the tenant. Section 6.3.3.2 repeats the same rule for the maintenance-and-testing provisions.
The practical bite: 6.3.3.3 requires the alarm, plus its primary and backup power, to be kept in operating condition, and the law names the landlord — not the tenant — as the one on the hook. A lease clause reading “tenant maintains the smoke alarms and replaces the batteries” does not move that duty. As far as the Fire Code is concerned, the person answerable for whether the alarm actually works is always you.
⚠️A “tenant maintains the alarms” clause is not a shield. It may govern the private arrangement between you and your tenant, but it does not transfer the Fire Code duty — 2.13.1.2 fixes the “owner” role on the landlord by law. When a fire marshal or an insurer comes asking, that clause will not stand between you and s. 28.
“But the tenant is the one who disabled it” — true, and also illegal
When a tenant pulls the battery, two separate things happen in law, and it pays to keep them apart.
First, the tenant broke the law. Section 6.3.3.6 is flat: no person shall disable a smoke alarm. Pulling the battery is the textbook way to disable one. That is an offence under FPPA s. 28(1) and prosecutable under s. 28(3) — up to $50,000 for an individual’s first offence, up to $100,000 for a subsequent one, or up to a year in jail. (A corporate landlord faces far more: up to $500,000 first, and $1,500,000 on a repeat, under s. 28(4).)
Second, your duty is still standing. The tenant’s breach does not retire yours. After a fire, an investigation looks at both questions at once: did the tenant unlawfully disable it, and did the landlord meet the statutory duty to maintain and test? The tenant being at fault is not the same as you being off the hook. These are two parallel lines of responsibility — one does not cancel the other.
Pulled the battery vs. wrecked the alarm — which RTA notice fits
ℹ️Match the notice to the facts. Serving an N7 (s. 63) — which needs wilful undue damage — over a battery that was merely removed will likely fail, because nothing was actually damaged. For a pulled battery, look first to the s. 64 N5 (interference with the landlord’s lawful right or interest); save ss. 62/63 for real damage.
Build the paper trail: test yearly, and at every turnover
Log every one: date, unit, result, who tested it. That dated record is the single most useful thing you can produce if there is ever a fire investigation or an insurance dispute.
Hand over the manufacturer’s maintenance instructions
Act on the tenant’s notice — promptly
- Ontario Fire Code, O. Reg. 213/07, ss. 2.13.1.1 (scope and exceptions), 2.13.1.2 (only the landlord is the “owner”), 2.13.2.1 (installation)
- Ontario Fire Code, O. Reg. 213/07, ss. 6.3.3.2–6.3.3.8 (maintenance, instructions, tenant notice, disabling prohibited, replacement, testing) and 6.3.4.8 (CO alarm testing)
- Fire Protection and Prevention Act, 1997, S.O. 1997, c. 4, s. 28 (offences: individual up to $50,000 first / $100,000 subsequent; corporation up to $500,000 / $1,500,000) and s. 30.1 (one-year limitation)
- Residential Tenancies Act, 2006, S.O. 2006, c. 17, ss. 27 (entry, 24-hour written notice), 34 (tenant repair duty), 62 / 63 / 64 (N5 / N7 notices)
💡 My honest take: the one thing you can’t control here is whether a tenant pulls a battery at 2 a.m. because the alarm won’t stop chirping — you can’t engineer away that impulse. What you can control, completely, is whether your own compliance chain is done and documented. So keep it boring and airtight: install it right, hand over the instructions, test every year and at every turnover without fail, fix faults the day you hear about them, and write down each step with a date on it. The tenant’s decision to disable the alarm is the tenant’s legal risk to carry — you can’t stop it and you don’t have to wear it. But if you can’t produce your own compliance record, that is the moment you volunteer for liability that was entirely avoidable. If you’ve got a tenant who repeatedly disables alarms and stonewalls access, bring in a licensed professional or your local fire service early — don’t let it fester into a hazard.
Smoke and CO Alarms When You Sell in Ontario: What the Fire Code Actually Requires, and Whose Job It Is →Ontario’s Winter Disconnection Ban — and the Landlord Who Doesn’t Pay the Bill →Rental Move In Inspection →First-Time Renter Guide →
Frequently Asked Questions
Can a lease clause saying “tenant maintains the smoke alarms” get me off the hook?
No. The Fire Code (2.13.1.2) fixes the “owner” role on the landlord by law and expressly excludes the tenant from the definition of “landlord.” A lease clause can shape your private arrangement with the tenant, but it cannot transfer the statutory duty — under FPPA s. 28 the person prosecuted is still you.
The tenant disabled the alarm — can they actually be fined for it?
Yes. Section 6.3.3.6 says no person shall disable a smoke alarm, so a tenant who pulls the battery has committed a Fire Code offence. Under FPPA s. 28(3) an individual faces a fine of up to $50,000 for a first offence and up to $100,000 for a subsequent one, or up to a year in jail. That is separate from — not instead of — your own duty.
How often do I have to test, and does a change of tenant really count?
Under 6.3.3.8: at least once a year, and again after every change of tenant — plus after any battery change and after electrical work on the unit. CO alarms follow the same schedule under 6.3.4.8 (yearly, and after each change of tenant or occupant). The test is pressing the test button; record the date and result each time.
What records should I keep to actually protect myself?
Three things: a dated testing log (date, unit, result, who tested), proof you delivered the manufacturer’s maintenance instructions under 6.3.3.4 (a signed receipt or an email), and written responses to any tenant fault report under 6.3.3.5. The landlord’s duty is judged on whether you did the right actions, not on whether the alarm happened to fail — so the paper trail is the defence.
Do carbon monoxide alarms carry the same rules?
Yes, for the units that need them. Under 2.16.1.1, a CO alarm is required where there is a fuel-burning appliance, a fireplace, or a storage garage (or where the unit is heated by a forced-air combustion appliance located outside it). Section 2.16.1.2 again makes only the landlord the “owner,” and 6.3.4.8 sets the testing duty: yearly, and after each change of tenant or occupant.
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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