Smoke and CO Alarms When You Sell in Ontario: What the Fire Code Actually Requires, and Whose Job It Is

The duty belongs to the owner and it never switches off. Selling creates no new rule — it just holds a magnifying glass to one you already had.

I am Arthur Zhao. Of everything that can complicate a sale, a hardware-store smoke alarm is the one sellers never see coming — until a buyer’s inspector writes “no CO alarm outside the primary bedroom” into the report, and a low-cost item is suddenly a line in the negotiation.

Let me clear up the misconception first: there is no Ontario law that says you must install alarms before you sell. The obligation has always belonged to the owner, and it is continuous. You are the owner right up to the day title changes hands, so this duty has been yours the whole time you have lived there. The cleanest way to get it right is not to memorize the statute but to walk your own home with it. So let me take you room by room — every storey, every sleeping area, anything that burns fuel, any separate unit — then show how a buyer turns what you missed into leverage, and what non-compliance actually costs.

First, the one thing to get right: this is the owner’s duty, and it never switches off

Plenty of sellers assume the fire rules contain a line reading “before selling you must do X.” I have been through O. Reg. 213/07 — there is no such line. The Fire Code’s duty runs, start to finish, to the owner — or, where the home is rented, to the landlord who is deemed the owner — and it is a continuous obligation, not a one-time step triggered by a sale.

That is not a technicality; it changes how you should check. You do not need alarms because you are selling. You have owed them the whole time as the owner, and selling is simply what forces a buyer, an inspector and a lawyer to look. So the useful move is not to read the regulation cold — it is to read it against the actual house you are about to list.

Walk your own home, not the rulebook

The Fire Code attaches its requirements to physical things, not to legal moments: how many storeys you have, where people sleep, whether anything burns fuel, and whether any part of the home is a separate unit. Walk the house once with those four questions and you have covered almost everything it asks of you. Here is that walk, in order.

How a buyer turns what you missed into leverage

Everything above is your standing duty; the sale is where it gets tested. Most buyers hire a licensed inspector, and alarms — too few, wrong locations, removed, dead battery, obviously aged — are near-standard checklist items that go into the report in plain text. Once they are in the report, a buyer can make remediation a condition, ask for it before closing, or use it to adjust price. Because you are the owner until closing and the duty is already yours, the cost and the leverage both sit on your side. Your agreement of purchase and sale (or a schedule to it) may also carry a representation about the state of the alarms — but that depends on how your particular contract is written, so do not assume a standard form contains such a clause. Confirm it with your real estate lawyer before closing.

The penalties: read the word “maximum” carefully

Contravening the Fire Code is an offence. Under s. 28 of the FPPA, an individual convicted for a first offence faces a fine of up to $50,000, up to $100,000 for a subsequent offence, and possibly up to a year in jail; a corporation faces up to $500,000 for a first offence and $1,500,000 after that.

But read “up to.” These are statutory maximums, not the ticket you get for one missing alarm. The set fines local fire services actually issue on the ground are far lower and vary by municipality — I could not confirm a single standard figure, so I am not quoting a dollar amount here, only the scale of the legal ceiling. For a seller, the real-world cost is rarely the fine; it is the inspection-and-closing friction above.