Can a Tenant Get Compensation for an Uninhabitable Unit?
A general look at remedies for serious maintenance failures.
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The landlord's maintenance obligation
Under the Residential Tenancies Act, 2006, a landlord is generally responsible for maintaining a rental unit and the residential complex in a good state of repair, and for complying with health, safety, housing, and maintenance standards set by provincial law and municipal property standards by-laws. This obligation exists regardless of what the lease says — a landlord cannot contract out of it, and a tenant cannot waive it by agreeing to accept a unit "as is." The duty applies for as long as the tenancy continues, not just at move-in, which means a unit that was fine on day one but has since deteriorated — a persistent leak, a failed furnace, a pest infestation — can still trigger the landlord's maintenance obligation in exactly the same way.
This matters for tenants because it means the starting legal question is rarely "did the lease promise this?" but rather "does the condition fall below what the law and local by-laws require?" A landlord's maintenance duty is a baseline that sits underneath every tenancy in Ontario, and a tenant does not need special lease language to rely on it.
Key point
Compensation for an uninhabitable or poorly maintained unit generally flows through a T6 application to the Landlord and Tenant Board, not through simply withholding rent. Withholding rent on your own initiative carries real risk, including the possibility of an eviction application for non-payment, so it is generally not treated as a safe remedy on its own.
What "uninhabitable" generally means
There is no single legal checklist that labels a unit "uninhabitable," but in practice the LTB looks at whether conditions in the unit fall below the maintenance standards a landlord is required to meet. Common examples that tenants raise include a non-functioning heating system during cold months, a lack of hot or running water, a serious and ongoing pest infestation, significant mould linked to a moisture problem the landlord has not addressed, broken locks or security features, or damage from an unresolved leak that affects usable living space. A single minor issue — a loose cabinet handle, a scuff on a wall — is unlikely to rise to this level on its own, but a pattern of unresolved issues, or one serious issue left unaddressed for an extended period, often will.
Severity and duration both matter. A heating failure fixed within a day is treated very differently from one that persists through a cold spell. The LTB generally looks at how serious the impact on the tenant's use and enjoyment of the unit was, how long it lasted, and whether the landlord was given a fair opportunity to fix it and failed to act.
The T6 application and what it can ask for
The main route for a tenant seeking compensation for maintenance failures is a T6 application, formally called "Tenant Application About Maintenance." A T6 lets a tenant ask the LTB to find that the landlord breached the maintenance obligation and to order a remedy. This can be filed while the tenancy is ongoing, and in some circumstances after it has ended, though timing and evidence considerations differ depending on when you apply.
In a T6, a tenant describes the specific problems, when they started, what steps were taken to notify the landlord, and what happened (or didn't happen) in response. The application can ask for several things at once — an order requiring repairs, a rent abatement for the period the unit was below standard, and in some cases compensation for costs the tenant incurred because of the problem, such as alternative accommodation during an extended repair, or the cost of replacing damaged belongings.
Types of compensation the LTB may order
If an adjudicator finds that a landlord failed to meet the maintenance obligation, the range of possible remedies is broader than many tenants expect, but none of it is automatic or guaranteed. A common remedy is a rent abatement — essentially a partial rebate reflecting that the tenant did not receive full value for the rent paid during the period the unit was substandard. The LTB may also order the landlord to complete specific repairs by a set date, sometimes with a further order allowing the tenant to have the work done and deduct the cost from rent if the landlord still doesn't act (subject to the LTB's specific terms). In cases involving real financial loss — spoiled food from a fridge failure, a hotel stay during a heating outage, damaged possessions from a leak — the Board may order the landlord to reimburse documented, reasonable costs.
What the LTB generally will not do is award compensation based on guesswork or a tenant's general frustration alone. Claims that are tied to specific, documented losses and a clear timeline tend to fare better than vague assertions that "the unit was bad the whole time."
What to avoid
Some tenants assume the safest response to a serious maintenance problem is to stop paying rent until it's fixed. This is generally not advisable: non-payment of rent can expose a tenant to an N4 notice and eviction application on a completely separate track from the maintenance issue, and the two problems do not automatically cancel each other out at a hearing. A T6 application, filed while rent continues to be paid, is the more reliable way to pursue compensation.
Evidence that supports a compensation claim
The strength of a T6 application usually comes down to documentation. Dated photos and short videos showing the condition of the unit, copies of written notices to the landlord (texts, emails, or a letter) describing the problem and when it was reported, any response from the landlord, and records of related costs (receipts for a hotel, a dehumidifier, or replaced items) all help build a timeline an adjudicator can follow. Keeping a simple log — date, what happened, who you contacted, what was said — is one of the most useful things a tenant can do, because memory alone rarely holds up as well as a contemporaneous record months later at a hearing.
Where possible, it also helps to have a record that the municipality was contacted, since a property standards inspection and any resulting order can be persuasive evidence that conditions fell below the legal standard, independent of the tenant's own account.
Steps to take before you apply
Before filing, it's generally wise to give the landlord clear, written notice of the problem and a reasonable opportunity to respond — not because the law always requires this as a strict precondition, but because an adjudicator will often ask what notice the landlord was given, and a tenant who can show they raised the issue promptly and in writing is in a stronger position. If the landlord doesn't respond or the response is inadequate, contacting your local municipal property standards or bylaw office can sometimes prompt an inspection, which creates independent evidence. From there, gathering your documentation and filing a T6 (or raising the issue as part of responding to a landlord's own application) is the next concrete step.
Realistic limits on what to expect
It's worth being realistic about outcomes. The LTB decides every case on its specific facts, and there is no fixed formula that guarantees a particular rent abatement percentage or dollar amount for a given problem. Adjudicators generally weigh the severity of the issue, how long it went on, how promptly the landlord was notified, and how the landlord responded. A tenant should go into the process expecting a fact-specific decision rather than assuming any particular result, and should be prepared for the possibility that an adjudicator finds the landlord's response was reasonable given the circumstances, even if the tenant disagrees.
Other routes besides the LTB
The LTB is usually the most direct route, but it isn't the only one. Local municipalities generally enforce their own property standards by-laws and can order a landlord to make repairs under threat of municipal penalties, separate from anything the LTB decides. In unusually serious cases involving significant financial loss, a tenant might also explore options through Small Claims Court or with advice from a lawyer or paralegal, though for most maintenance disputes the LTB's T6 process remains the primary and most accessible avenue.
This article provides general information about Ontario landlord and tenant law.
It is not legal advice. For advice about a specific situation, consult a licensed
paralegal or lawyer, or contact the Landlord and Tenant Board.
Frequently Asked Questions
Generally, a T6 application ("Tenant Application About Maintenance") is the main form for raising maintenance failures and asking for remedies, including possible compensation or rent abatement.
This is generally not advisable. Withholding rent can expose you to a separate non-payment eviction process, which doesn't automatically go away because of an unrelated maintenance dispute. Filing a T6 while continuing to pay rent is the more reliable path.
There's no fixed amount or formula. The LTB decides each case on its own facts, weighing the severity and duration of the problem and how the landlord responded, so outcomes vary considerably.
Giving the landlord clear written notice and a reasonable chance to respond is generally a strong idea, since an adjudicator will often look at what notice was given and how the landlord reacted.
In some circumstances, yes, though timing and evidence considerations can differ from an application filed during an ongoing tenancy. It's generally best to act as promptly as possible.
Dated photos and videos, written notices to the landlord and their responses, and receipts for related costs all tend to help. A simple dated log of what happened and when is often one of the most persuasive pieces of evidence.
Generally, yes. Municipal property standards or bylaw offices can inspect a unit and order repairs under local by-laws, separately from any LTB process, and an inspection report can also support an LTB application.
Usually not on its own. The LTB generally looks at how serious the impact on the unit's use and enjoyment was and how long it lasted; isolated minor issues are treated differently from serious or prolonged problems.
In many cases maintenance issues can be raised as part of responding to a landlord's application, such as one over unpaid rent, in addition to or instead of a standalone T6. The right approach depends on the specific circumstances.
A rent abatement is generally a partial reduction reflecting that the tenant didn't receive full value for rent paid during a period of substandard conditions. It functions similarly to a partial refund but is calculated by the LTB based on the specific facts.
Related reading
Reviewed by Ryan J. Manilla, BA, JD
Legal Reviewer · Landlord Tenant Ontario