Plumbing problems in a rental: what tenants and landlords are each responsible for

This is general information about how plumbing responsibility typically works in Ontario rentals, not legal advice. Specific situations vary, and for anything in dispute, the Landlord and Tenant Board or a tenant rights organization can give guidance specific to your case.

The general rule

In most Ontario rental situations, landlords are responsible for maintaining a property in a good state of repair, which includes plumbing systems, fixtures, and appliances that came with the unit. This covers ordinary wear and tear: an aging water heater that finally fails, a toilet that stops flushing properly, or pipes that develop a leak from age. Tenants are generally responsible for damage caused by their own negligence or misuse, not for the normal aging of a building’s systems.

Where the line usually falls

Situation	Typically landlord’s responsibility	Typically tenant’s responsibility
Water heater fails from age	Yes	No
Toilet clogged from normal use	Yes	No
Toilet clogged from flushing non-flushable items	Sometimes shared	Often, if clearly caused by tenant
Faucet leaking from worn parts	Yes	No
Pipe burst from a tenant leaving windows open in freezing weather	Sometimes shared	Often, if negligence is clear
Fixture damaged by tenant’s own installation or modification	No	Yes

These are general patterns, not guarantees for any specific situation. What actually applies depends on your lease, the specific facts, and, if it comes to that, a Landlord and Tenant Board decision.

What counts as urgent

A total loss of running water, a non-functioning toilet with no other bathroom access, sewage backing up into the unit, or active flooding are the kinds of plumbing problems that typically require a fast landlord response, since they affect whether the unit is livable at all. A slow drain or a minor drip is a real problem worth reporting, but it doesn’t carry the same urgency and landlords are generally given more reasonable time to address it.

Getting a repair actually done

Report the problem in writing, even if you also call or text, since a written record matters if the situation escalates. Be specific about what’s wrong, when it started, and any impact on daily use of the unit, running water or a working toilet especially. Include a photo or short video if the problem is visible. Keep a copy of your request and any response, and note the date and time you sent it. Most landlords respond appropriately once a plumbing issue is reported, but if there’s no response within a reasonable window, especially for an urgent issue, your municipality’s property standards department can often intervene, and Ontario’s Landlord and Tenant Board is the formal path for unresolved disputes. A follow-up message after a few days of silence, still in writing, adds another documented step that helps if the situation does end up before the Board.

A note for landlords and property managers

The same responsibility split cuts both ways: addressing plumbing issues promptly, even minor ones, tends to prevent the kind of escalation that ends up costing more in repairs, tenant turnover, or a Landlord and Tenant Board application. A running toilet ignored for months can turn into a much larger water bill and, eventually, a fixture failure. Keeping a simple maintenance log across units, especially for water heaters and older fixtures that are approaching the end of their typical service life, makes it easier to plan replacements before they become emergencies for a tenant.

If you need to call a plumber yourself

In some situations, particularly a genuine emergency with no landlord response, a tenant may need to arrange a repair directly and seek reimbursement afterward. This is a bigger step, and it’s worth understanding your specific rights and any required notice before doing it, since the rules around this are more particular than the general responsibility split above. Keep every receipt and piece of communication if you go this route. If cost is a barrier even after confirming the repair isn’t yours to pay for, the free and low-cost plumbing help in Ontario guide covers other places to look.

If you do end up arranging your own plumber, comparing licensed plumbers on price and reviews still matters, since a rushed emergency call is exactly the situation where an unfair quote is easiest to hand out. The methodology page explains how listings are scored on transparent pricing.