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Unpaid Condo Fees in Ontario: Can a Lien Outrank Your Mortgage?

Learn how an Ontario condo corporation's lien for unpaid common expenses works, when it ranks ahead of a mortgage, and how power of sale may follow.

Real Estate4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • A condo corporation has a lien against your unit for unpaid common expenses, and it expires three months after the default unless a certificate of lien is registered in that time.
  • A registered lien generally ranks ahead of an earlier mortgage, but it can lose that priority if it is registered late or registered encumbrancers are not notified.
  • The corporation can start its own power of sale 15 days after registering the certificate of lien, so unpaid fees can put your home at risk.

Falling behind on condo fees can feel less serious than missing a mortgage payment. In Ontario, though, the condominium corporation has strong tools to collect, and they can affect both you and your mortgage lender.

This article explains in plain language how the lien works, when it can rank ahead of a mortgage, and how a power of sale may follow. Your situation may turn on details, so use this as a general guide and confirm the specifics with a lawyer.

When the corporation gets a lien

If an owner defaults on common expenses, the condominium corporation has a lien against the unit and its common interest for the unpaid amount (Condominium Act, 1998, s. 85(1)).

The lien covers the unpaid amount, interest and all reasonable legal costs of collection. That means a small arrears balance can grow if the corporation has to take steps to collect.

The three-month deadline and the 10-day notice

The lien expires three months after the default unless a certificate of lien is registered within that time, and the owner must get written notice at least 10 days before registration.

How a lien can rank ahead of your mortgage

A registered condo common-expense lien has priority over every registered and unregistered encumbrance on the unit, including an earlier mortgage (Condominium Act, 1998, s. 86(1)). This is unusual, because mortgages and other charges generally rank by the order of registration.

There are limits. The lien loses priority over a mortgage if the corporation does not register it within three months, or does not give written notice to every registered encumbrancer on or before the day it registers the certificate of lien (s. 86(3), (5)). A condo lien also does not have priority over a Crown claim other than a claim by way of mortgage.

SituationEffect on priority
Lien registered in time and mortgagees notifiedRanks ahead of an earlier mortgage
Lien not registered within three monthsLoses priority over a mortgage
Registered encumbrancers not notified in writingLoses priority over a mortgage
Crown claim (not by way of mortgage)Lien does not have priority

Power of sale and the Mortgages Act timelines

The corporation can start its own power of sale process 15 days after registering the certificate of lien.

Where a mortgage contains a power of sale, the lender cannot give notice of sale until the default has continued for at least 15 days, and cannot sell until at least 35 days after the notice is given. The 35-day notice must go to every person having an interest in the mortgaged property, and it must be in Form 1, Notice of Sale under Mortgage.

As a borrower in default, you can generally stop a lender from enforcing the acceleration clause by paying the arrears and the lender's necessary expenses (Mortgages Act s. 22(1)). You can also give written notice requiring a statement of the arrears and expenses, and the lender must answer within 15 days. Once a power of sale closes, that right no longer applies and you are limited to a claim for damages against the lender.

If a sale is under way, the lender must take reasonable precautions to obtain the true market value of the property as of the date of sale.

What to do next

Acting quickly matters because the timelines are short. A lawyer can review your documents and explain your options.

Frequently asked questions

Can a condo corporation sell my unit for unpaid fees?

It can register a lien and, 15 days after registering the certificate of lien, start its own power of sale process. Before that, the owner must get written notice at least 10 days before registration. The details depend on your facts, so get advice early.

Does a condo lien always come before my mortgage?

No. A registered lien has priority over an earlier mortgage, but it loses that priority if it is not registered within three months or registered encumbrancers are not notified in writing. It also does not have priority over a Crown claim other than one by way of mortgage.

What does the lien cover besides the unpaid fees?

It covers the unpaid amount, interest and all reasonable legal costs of collection. So delay can make the total owing larger.

Do older condo units follow the same rules?

Not necessarily. Units under the repealed Condominium Act may have had different priority rules, so confirm which Act applies to your unit. Also check the current statutory wording on Ontario e-Laws with a lawyer.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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