Ontario Rental Water Damage: Tenant vs Landlord
Building defect or maintenance failure → landlord’s side under Ontario’s Residential Tenancies Act (s.20 duty to maintain). Tenant belongings → tenant insurance. Notify the landlord in writing immediately, photograph, and get water out of the suite the same day. Guardian restores the wet structure; we do not decide tenancy disputes.
Leaks in GTA rentals create two files that people mix up: who repairs the building, and who replaces soaked furniture. Keeping those separate saves time when everyone is stressed.
A practical split
| Issue | Typical responsibility | Notes |
|---|---|---|
| Burst pipe in the building, roof leak, failed plumbing in the unit envelope | Landlord | RTA s.20: maintain the rental unit and residential complex fit for habitation |
| Drywall, flooring, and structural drying after a building-side leak | Landlord / landlord’s insurer | Mitigation should start promptly |
| Clothes, electronics, furniture | Tenant | Usually tenant insurance (contents) |
| Tenant-caused overflow (tub left running) damaging the suite | Often tenant / tenant insurer | Facts matter; document carefully |
| Mould after unresolved moisture from a building defect | Landlord to remediate habitability | Written notice and photos help |
What tenants should do the same day
- Make the area safe — leave if electrical risk or sewage is present.
- Email or text the landlord/superintendent with time, photos, and what failed.
- Call your tenant insurer if you carry contents coverage.
- Ask for emergency extraction; do not wait days while carpet pad stays wet.
What landlords and PMs should do
Isolate the source, authorize mitigation, and keep a clear paper trail for insurance. Delaying drying to argue fault later is how a small leak becomes a mould remediation. Guardian can document moisture for the claim file while you handle the tenancy side.
Official sources
- Residential Tenancies Act, 2006 (Ontario e-Laws), including s. 20
- Landlord and Tenant Board (Tribunals Ontario)
- Health Canada: Mould
Related: What to do after water damage · Preventing mould after a flood · Mould remediation
Common questions
Who pays for water damage in an Ontario rental?
If the loss comes from a building defect or the landlord’s responsibility to maintain the premises (Residential Tenancies Act s.20), the landlord typically handles structural repairs. Tenant belongings are usually covered by tenant insurance. Put notice in writing the same day.
Is my Ontario landlord responsible for mould after a flood or leak?
When mould follows a building defect, unresolved moisture, or failure to maintain the unit, landlords generally must address habitability. Tenants should notify in writing immediately and keep photos. Belongings and additional living expenses usually sit on tenant insurance when the tenant carries it.
How fast does a landlord have to fix water damage or mould?
There is no single hour count that fits every file. Serious habitability issues should be reported in writing right away. Emergency mitigation — extract and dry — should not wait while paperwork catches up. Speak with your landlord, and if needed the Landlord and Tenant Board or legal advice; Guardian handles the drying, not tenancy disputes.
General information for Toronto and the GTA. Not legal or insurance advice. Your policy wording, declarations page, and (for condos) by-laws control the file.