Under the Residential Tenancies Act, 2006 (RTA), landlords and tenants in Ontario can enter into a voluntary agreement to increase rent above the annual guideline amount under specific, narrow statutory conditions—such as the provision of new capital improvements, structural work, or added services.
However, if a tenant agrees to an Above-Guideline Rent Increase (AGI) and the landlord fails to carry out the promised work or supply the agreed-upon services, the tenant has the legal right under Section 123 of the RTA to file a Form T4: Tenant Application – Landlord Did Not Comply with an Agreement to Increase Rent Above the Guideline.
At Lex Defensio, our legal team represents Ontario tenants before the Landlord and Tenant Board (LTB) to enforce compliance, void unauthorized rent hikes, and secure monetary refunds.
Valid Statutory Grounds for Filing a Form T4
Under Sections 121 and 123 of the RTA, a Form T4 application can be filed with the LTB under two distinct circumstances:
- Failure to Perform Promised Capital Work / Services: The landlord entered into a written agreement with the tenant to increase rent above the statutory guideline in exchange for major capital improvements, repairs, or extra facilities (e.g., installing air conditioning, building a deck, or upgrading kitchen appliances), but the landlord failed to complete the work or provide the service within the agreed timeline.
- Failure to Reduce Rent After Capital Work Costs Are Paid Off: The landlord previously increased rent pursuant to an above-guideline agreement or LTB order for capital expenditures, but failed to reduce the rent once the capital work costs were fully amortized as required under RTA rules.
Technical Statutory Rules & Strict Limitation Periods
To succeed at an LTB hearing, tenants must navigate several strict procedural requirements:
- Strict 2-Year Limitation Period: A Form T4 application must be filed with the LTB within 2 years of the date the rent increase took effect or the date the work/facility was scheduled to be completed.
- Written Agreement Requirement: The initial agreement to increase rent above the guideline must be in writing (often using the official LTB form) and must explicitly list the promised capital work or service.
- Proportionate Rent Reductions: If the landlord completes only a portion of the promised work, the LTB will calculate a partial rent reduction and order a proportionate refund.
Available Remedies Under Form T4
If the LTB determines that the landlord breached the rent increase agreement, an adjudicator can grant the following statutory orders:
| Statutory Remedy | Description / Effect |
|---|---|
| Rent Abatement & Rebate | Ordering the landlord to pay a full or partial refund of the excess rent collected while non-compliant. |
| Permanent Rent Reduction | Canceling or reducing the above-guideline portion of the monthly rent going forward. |
| Order for Compliance | Directing the landlord to complete the promised capital work or service by a specific deadline. |
| Administrative Fines | Ordering the landlord to pay a fine to the Board for bad-faith non-compliance under the RTA. |
Form T4 Application Workflow
- Written Agreement Executed
- Landlord Fails to Perform Work
- File Form T4 via Portal
- LTB Adjudication Hearing
- Documenting Non-Compliance: Compile written agreements, communication logs, photos, and rent payment receipts establishing that rent was raised but promised improvements were not delivered.
- Filing Application: Draft and file the Form T4 Application through the Tribunals Ontario Portal, outlining the exact monetary remedies requested.
- Serving the Landlord: Deliver a copy of the application and Notice of Hearing to the landlord according to LTB service rules, submitting a signed Certificate of Service.
- Hearing & Representation: Present organized financial evidence, photographs, and oral testimony before an LTB Adjudicator.
How Lex Defensio Protects Tenant Rights
Challenging unauthorized rent hikes and breach-of-agreement issues requires technical knowledge of RTA statutory calculations and LTB precedent. Lex Defensio offers comprehensive legal support:
- Agreement & Rent Audit: We analyze your initial rent increase agreement to verify whether it complied with RTA Section 121 and determine exact refund amounts.
- Evidence Gathering: We compile photographic evidence, payment records, and landlord correspondence into an organized exhibit bundle for LTB proceedings.
- Application Preparation & Filing: We draft and submit Form T4 through the Tribunals Ontario Portal to avoid procedural errors or processing delays.
- LTB Hearing Representation: Our licensed legal professionals represent you at LTB hearings, presenting structured legal arguments to secure rent reductions and monetary rebates.
Facing an Unauthorized Rent Increase or Unfulfilled Landlord Promises?
Contact Lex Defensio to schedule a legal consultation regarding your Form T4 application.

