By A.J. Keilty, President, KEILTY Realty Management

No, and that surprises most owners. Ontario imposes no duty to publish a number, staff a phone, or pick up at three in the morning. What it imposes is an outcome, and the outcome does not care how you found out.
That distinction is the whole decision. If you are weighing running your own rental against handing it to someone, the question is not whether the law makes you answer. It is what the law expects to have happened by morning, and whether you can deliver that from a dead sleep two hours away.
The short version.
It does not, and the Act is unusually quiet about it. Measured on 2026-10-26 on the consolidation's own document container, the words "after-hours", "after hours", "24-hour", "on-call" and "24/7" each return zero across the whole statute.
"Telephone" appears exactly once, in section 201 (1) (c), where the Board may "question any person, by telephone or otherwise, concerning the dispute ...". That is the tribunal's procedure, not your obligation.
"Emergency" appears five times. Two are inside the definition of municipal taxes and charges, one of them inside the word "non-emergency", one exempts emergency shelters from the Act, one is the marginal note to section 26 (1), and one is section 26 (1) (a) itself. None of them creates a duty to attend.
So there is no channel obligation anywhere in the Act. No required number, no required response time, no required answering service. An owner who screens calls overnight has not broken a rule by screening them.
That is a narrower finding than it sounds, and it is the beginning of the argument rather than the end of it.
Section 20 (1) is the duty, and it is phrased as a state of affairs rather than a response. A landlord "is responsible for providing and maintaining a residential complex, including the rental units in it, in a good state of repair and fit for habitation and for complying with health, safety, housing and maintenance standards."
Read what is missing from that sentence. There is no trigger, no mental element and no notice requirement. The duty is running at three in the morning whether or not anyone has called you, and whether or not you are awake.
Section 20 (2) closes the obvious escape. The duty "applies even if the tenant was aware of a state of non-repair or a contravention of a standard before entering into the tenancy agreement." A tenant who took the unit knowing the furnace was old has given up nothing.
There is also no deadline in section 20. "A good state of repair" is the standard the Act sets, and it sets no number of hours. The reasonableness of your timing is argued later, at the Board, rather than fixed in advance by the statute.
Which cuts both ways for an owner. Nobody can point to a provision saying you had four hours. Nobody can point to one saying you had a week either.
This is the part most owners have backwards, and it is worth getting exactly right because section 21 is the expensive one.
Section 21 (1) provides that a landlord shall not, at any time during the tenant's occupancy and before the day an eviction order is executed, "withhold the reasonable supply of any vital service, care service or food that it is the landlord's obligation to supply under the tenancy agreement or deliberately interfere with the reasonable supply of any vital service, care service or food."
Look at the two verbs. "Withhold" is to keep something back, which is an act of will. "Deliberately interfere" says so outright. A furnace that fails of its own accord on a Saturday night is not being withheld by anyone, and nobody has interfered with it.
The offence provision points the same way. Section 233 makes it an offence to do any of a list of things "knowingly", and its clause (a) is withholding the reasonable supply of a vital service, or interfering with the supply, in contravention of section 21.
So an equipment failure you did not cause and did not know about is not a section 21 breach. It is a section 20 repair obligation, which is a different and more forgiving provision.
Here is the hinge. Where the service is one you are obliged to supply under the tenancy agreement, declining to restore it is where section 21 starts to fit. Once you know the heat is off and choose not to act, "withhold" is a reading the Board can reach on these words.
Be clear that this is a reading rather than a stated rule. No provision says at what moment a failure becomes a withholding, and the Act does not define the word. What it does give you is the direction of travel, which is enough to plan around.
That is the real risk in covering emergencies yourself. Not the first hour of the failure, which the law treats generously. The second day, when a missed call has quietly turned into a decision not to act.
There is a cure, and it is the obvious one. Restoring the service as soon as you learn of it keeps the matter inside section 20, where the argument is about reasonable timing, rather than letting it drift into section 21, where it is about choice.
The remedy end is discretionary too, which owners rarely know. Section 30 (1) says the Board "may" make one or more of the orders listed, so even a proven breach does not carry an automatic consequence. Discovering a failure late is not the problem. Discovering it and leaving it is.
One more distinction inside section 21, because the two limbs do not reach equally far. The withholding limb is confined to a service "that it is the landlord's obligation to supply under the tenancy agreement", so if the tenant holds the gas account it does not bite. The deliberate interference limb carries no such qualifier and reaches a service the tenant supplies.
Section 21 (2) marks the outer edge of inaction. Where you are obliged to pay someone for the service, fail to pay, and the supply stops as a result, you are deemed to have withheld it. An unpaid bill counts. A broken part does not.
Yes, and it is the one failure most likely to arrive at an unsociable hour in this part of the province.
"Vital service" is defined in section 2 (1) as "hot or cold water, fuel, electricity, gas or, during the part of each year prescribed by the regulations, heat." Note how short that list is. The furnace, the roof, the fridge and the plumbing are not vital services in themselves.
The regulation supplies the dates and the number. O. Reg. 516/06, s.4 (1) prescribes September 1 to June 15 as the part of the year during which heat is a vital service.
Section 4 (2) then sets the floor: heat must be provided so that the room temperature "at 1.5 metres above floor level and one metre from exterior walls in all habitable space and in any area intended for normal use by tenants, including recreation rooms and laundry rooms but excluding locker rooms and garages, is at least 20 degrees Celsius."
That 20 degrees is provincial and it applies everywhere the Act does. It sits in the interpretation part of the regulation, as part of the definition of a vital service, rather than in the maintenance standards, so a municipal property standards by-law does not displace it. A by-law can require more. It cannot require less.
There is a second 20 degree rule in Ontario and it behaves differently, which is worth knowing before someone quotes the wrong one at you. The maintenance standards in O. Reg. 517/06 carry the same figure at section 15, in identical words.
That one is displaceable. Section 224 (1) of the Act applies those standards only where there is no municipal property standards by-law, or where the prescribed circumstances apply. The vital service floor is not displaceable, which is the whole reason the distinction matters.
There is one carve-out, in section 4 (3), and both of its conditions have to hold. Subsection (2) does not apply to a unit "in which the tenant can regulate the temperature and a minimum temperature of 20 degrees Celsius can be maintained by the primary source of heat." A tenant with a thermostat on a furnace that cannot actually reach 20 degrees is still covered.
So a dead furnace in January is heat, and heat is a vital service, and the clock on your decision not to act starts running that night. A dead furnace in July is a repair obligation and nothing more.
Which other failures sit inside the duty, and which belong to the tenant, is a longer list than this post can hold. We work through it in what repairs a landlord is responsible for in Ontario.
It changes the remedy rather than the obligation, and that is a useful thing for an owner to understand precisely.
The duty in section 20 (1) runs whether or not you were told. What being told does is move the question from whether you were in breach to what the Board should do about it.
Section 30 (2) directs the Board, in determining the remedy on a tenant's maintenance application, to consider whether the tenant advised the landlord of the alleged breaches before applying. A tenant who never called you is in a weaker position on remedy than one who called you four times.
The regulation goes further in your favour on work that disturbs a unit. O. Reg. 516/06, s.8 (4) bars the Board from ordering an abatement where a list of conditions is satisfied, and the first of them requires notice at least 60 days before the work begins, "or, in cases of emergency, as soon as was reasonable in the circumstances ...".
That phrase is the only place in O. Reg. 516/06 that bends a notice requirement because something broke at an awkward time. It does not excuse the repair. It protects you on the disturbance the repair causes, provided the rest of the list is met, including that the work was done at reasonable times and that you took reasonable steps to minimise the noise.
Read together, the picture is consistent. The law does not require you to be reachable. It rewards owners who were reachable, and it penalises owners who were reachable and did nothing.
You can, and this is the one place the Act is unambiguously on your side.
Section 26 (1) provides that a landlord may enter a rental unit "at any time without written notice, (a) in cases of emergency; or (b) if the tenant consents to the entry at the time of entry." There is no time-of-day limit in that subsection and no requirement to warn anyone first.
The Act never defines "emergency", so the ordinary meaning governs: a burst pipe, a gas smell, a fire, a failed furnace in a cold snap.
Note the word "may". Section 26 (1) is a permission, not a duty. Nothing in it obliges you to go, which is the same point as the opening of this post, arriving from the other direction.
Outside an emergency or consent at the door, entry generally needs 24 hours' written notice under section 27, and section 27 (3) requires that notice to specify the reason, the day, and a time of entry between 8 a.m. and 8 p.m. A repair request from a tenant is not itself consent to walk in. The rules on getting that wrong are set out in whether a landlord can enter a rental unit without permission in Ontario.
Strip the law away and the operational question is narrow. You need three things to be true at two in the morning, and the first one is the one owners overestimate.
You have to hear the call. Not be willing to take it, which everyone is in principle, but actually hear it on the twentieth consecutive quiet night, when the phone is face down and you have a real job in the morning.
You have to reach someone who will attend. A plumber or an HVAC contractor who answers at that hour, at that hour's rates, and who will take the job for one unit rather than for a portfolio. This is where a single-property owner in a smaller market is genuinely worse placed than a manager, and it is not about diligence.
And you have to be able to decide. Whether this is an emergency entry or a morning appointment, whether the tenant should be moved, whether the cost is authorised. Judgement under time pressure, alone, half awake.
For an owner with one house in Peterborough and a job in Toronto, the first and second of those are the ones that break, and they break rarely enough to be easy to discount. The law will not fine you for missing the call. It will hold you to the state of the unit afterwards.
That is the trade to weigh. Self-managing after hours is not illegal and it is not reckless. It is a bet that the number of nights you are unreachable multiplied by the cost of the worst of them is smaller than what coverage costs.
What a manager changes is narrow, and frankly it is worth naming plainly. The call is answered by someone whose job is to answer it, the trades are already under contract at known rates, and the decision at two in the morning is made by someone who has made it before. None of that is a legal requirement. All of it is what the section 20 duty looks like when it is actually being discharged.
On a single house or a duplex that is the whole of what you are buying, which is why KEILTY Realty Management prices single-family rental management as a flat monthly rate rather than per incident. The nights nothing happens are the product too.
Does an Ontario landlord have to provide a 24-hour emergency number? No. Searched at source on 2026-10-26, the Residential Tenancies Act, 2006 contains no reference to after-hours coverage, on-call service or an emergency contact number, and its only use of the word "telephone" is the Board questioning a person under section 201 (1) (c).
The duty it imposes instead is section 20 (1)'s continuous obligation to keep the unit in a good state of repair, which says nothing at all about how you come to learn of a problem.
Is a broken furnace at night automatically a vital services breach? No. Section 21 (1) prohibits withholding a vital service or deliberately interfering with one, and both verbs require an act rather than an accident. A furnace that fails on its own is a section 20 repair obligation. It becomes a section 21 matter where the heat is yours to supply under the agreement and you know it is off and decline to restore it.
What temperature does an Ontario rental have to be kept at? At least 20 degrees Celsius, measured 1.5 metres above the floor and one metre from exterior walls, under O. Reg. 516/06, s.4 (2). Heat counts as a vital service from September 1 to June 15 under s.4 (1). A municipal by-law may set a higher figure but cannot set a lower one.
Can I enter the unit without notice if the tenant reports a flood? Yes. Section 26 (1) (a) permits entry "at any time without written notice" in cases of emergency, with no time-of-day restriction. Anything short of an emergency needs 24 hours' written notice under section 27, specifying a time between 8 a.m. and 8 p.m.
If you are deciding whether after-hours coverage on your own rental is worth what it costs you, we will tell you plainly what we would do with it. Tell us about the property and A.J. Keilty will call you within 20 minutes in business hours.
This post is general information about Ontario residential tenancy law as of 2026-10-26, not legal advice. Legislation, regulations and tribunal practice change. For advice on a specific property or situation, speak with a lawyer or licensed paralegal.