A Debt That Runs With the House: How a Tenant’s Unpaid Water Bill Becomes the Owner’s Property-Tax Problem in Ontario

A water account in your tenant’s name does not make you immune. In Ontario an unpaid water bill attaches to the land, not the person — it rides the property-tax roll onto the owner, and onto the next buyer.

I am Arthur Zhao. Here is the version of this problem that stings the most, because the person it lands on did nothing wrong: you buy a house, you close, and a few months later a charge you have never seen shows up on your property-tax account — an unpaid water bill run up by a tenant of the previous owner, someone you have never met.

The landlord version is quieter but just as common: the water account sits in the tenant’s name for years, the landlord assumes it is purely the tenant’s affair, the tenant leaves owing a few thousand dollars — and the arrears reappear on the landlord’s tax bill.

Neither of these is a mistake by the city. It is a deliberate feature of Ontario law: a water bill is a service supplied to a property, so the debt can be pinned to the land and travel with the tax roll. This article follows that debt from the tenant’s account all the way to the next buyer at closing — and marks where an owner, and a buyer, can still hit the brakes.

The debt runs with the land, not the tenant

Start with the mental model, because it is the whole article. In Ontario, an unpaid water bill has two landing spots, not one.

The first landing spot is a person. Under Municipal Act, 2001 s.398(1) (in Toronto, City of Toronto Act, 2006 s.264(1)), the fees and charges a city collects are a debt owed by that person to the city. A tenant who runs up the water bill genuinely owes the city money.

The second landing spot is the property — and that is the one that matters here. Because water is a service supplied to a specific property, the law lets the city add those arrears to that property’s tax roll and collect them the same way it collects taxes (s.398(2) para. 1 / s.264(2) para. 1). So the account name only decides the first landing spot. The second one always points at the property — and therefore at whoever owns it.

Why a bill in the tenant’s name can still be yours

The reason a tenant’s bill can become the owner’s problem is that Ontario gives water arrears something most stray charges never get: priority lien status. Whether a charge carries it is not decided by s.398(2) itself — it is set by ministerial regulation (s.400(d)).

That regulation exists, and it names water directly. O. Reg. 581/06, “Fees and Charges — Priority Lien Status,” lists the supply of water (along with gas, steam or hot water, and use of a sewage system) as carrying priority lien status. Toronto has its own mirror, O. Reg. 594/06, doing the same thing under the City of Toronto Act. So the moment a water charge is added to the tax roll, it automatically carries the lien — that is exactly what separates water from an ordinary unpaid fee.

And once that lien is on, Municipal Act s.1(3) (Toronto: s.3(7)) says the amount can be recovered as a debt from the assessed owner at the time it was added and from any subsequent owner, is a special lien on the property, and can even be rolled into the cancellation price at a tax sale. The words “any subsequent owner” are the whole reason a buyer needs to care.

Two statutes — check which one your property sits under

One trap worth calling out on its own: Ontario runs two parallel statutes here, and they are not interchangeable. A property in Toronto is governed by the City of Toronto Act, 2006 (s.264, s.3, O. Reg. 594/06). A property anywhere else in Ontario is governed by the Municipal Act, 2001 (s.398, s.400, O. Reg. 581/06).

The machinery is close to a mirror image — debt, add to the tax roll, priority lien, recover from any subsequent owner, and ultimately a tax sale — but the section numbers are entirely different. For a reader the takeaway is simpler than the citations: wherever the property is, an unpaid water bill can ride the tax roll onto the owner and be pursued against the next buyer. Do not reason about a Toronto property using Municipal Act sections, or vice versa.

For buyers: the tax certificate is your seatbelt

If you are buying, that phrase — “any subsequent owner” — is aimed straight at you. Purchase a home carrying a previous owner’s tenant’s water arrears that are already on, or heading onto, the tax roll, and that debt can land on you after closing, for water you never used.

This is where the article earns its keep for a buyer, and it is one concrete habit: have your lawyer verify the tax and utility position before closing. In practice —

• Your lawyer typically pulls a tax certificate from the municipality, confirming whether the tax account is in arrears or already carries transferred utility charges;
• Where the property’s water is municipally supplied and could reach the tax roll, confirm the utility account’s clearance separately;
• Reconcile any unpaid amount in the statement of adjustments, or make the seller clear it as a condition of closing.

Hidden arrears like this are a due-diligence matter, not a matter of luck. They are findable and stoppable — provided your team knows to go looking.

For landlords: the lease, a clearance letter, and what sub-metering does not fix

If you are a landlord, the lesson is not “always put the water in my own name” — that just pulls day-to-day billing back onto you. It is to stop treating “the account is in the tenant’s name” as a shield, and to manage the risk instead:

1. Spell out water responsibility in the lease. Who opens the account, who pays, who is responsible for arrears, and whether the tenant must provide proof of a cleared account on move-out — in writing, not on a handshake.

2. Ask for a clearance letter at move-out. Require the departing tenant to show the utility account is settled (or authorize you to confirm with the city), so the problem is caught while the tenant is still reachable — not after it has climbed onto your tax bill.

3. Understand what sub-metering does and does not do. A sub-meter with a third-party meter provider billing the tenant directly can separate day-to-day usage from your books. But it does not change the underlying mechanism: if related water arrears end up with the municipality and get added to the property’s tax roll, they still anchor back to the land. Sub-metering decides whose account; the statute decides where the debt lands.

And the usual caveat: I am a real-estate broker, not your lawyer. I have checked these provisions against the current e-Laws and toronto.ca versions, but for your specific file — especially where money, a clearance dispute, or a live transaction is involved — talk to a licensed lawyer or confirm directly with your municipality’s utility and tax departments.

Arthur Zhao

Real Estate Broker · FRI · ABR · SRS · PSA · MCNE · E-PRO · CLHMS & GUILD Elite · REAIS

VP & Branch Manager, Bay Street Group Inc.

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