Imagine you've just finished a kitchen renovation. You paid your general contractor every invoice on time, the work is done, and then — out of nowhere — you receive notice that a lien has been registered against your property. It happens to GTA homeowners more often than most people realise, and it can be alarming. Understanding what a construction lien is, how Ontario's legislation works, and what steps you can take will help you respond calmly and protect your most valuable asset.
What Is a Construction Lien?
A construction lien is a legal claim registered on the title of a property by a contractor, subcontractor, supplier, or worker who has not been paid for services or materials provided to improve that property. In Ontario, this right is governed by the Construction Act (formerly the Construction Lien Act), which was significantly modernised through amendments that came into full effect in 2021.
The core idea is straightforward: if someone contributes labour or materials to your home and is not paid, they have the right to attach a claim to your property title. This lien remains on title until it is resolved, which can affect your ability to sell, refinance, or transfer the property.
Who Can Register a Lien on Your Home?
This is where many homeowners are caught off guard. It is not only your direct contractor who can lien your property. Under the Construction Act, lien rights extend to:
- General contractors you hired directly
- Subcontractors hired by your general contractor
- Suppliers who provided materials to the job site
- Workers who performed labour on the project
This means you could pay your general contractor in full — including HST at 13% — yet still face a lien from a subcontractor or supplier your contractor never paid. The law recognises this chain of payment as a real risk and gives lower-tier parties direct recourse against your property.
Key Timelines You Need to Know
Ontario's Construction Act sets strict deadlines. Missing them can either extinguish a valid claim or, if you're the homeowner, give you grounds to have an improperly filed lien removed.
- 60 days to preserve a lien: A lien must be registered on title within 60 days of the last day the person supplying services or materials did so. For most residential projects, this clock starts when the project reaches "substantial performance" or when the last services are supplied.
- 90 days to perfect a lien: Once preserved, a lien claimant must take legal action (perfect the lien) within 90 days of registering it, or the lien expires.
- Holdback obligation: As a homeowner, you are legally required to hold back 10% of each progress payment made to your contractor. This statutory holdback exists specifically to protect subcontractors and suppliers in the payment chain.
The 10% Holdback: A Homeowner's First Line of Defence
The holdback requirement is one of the most misunderstood parts of the Construction Act among GTA homeowners. On every payment you make to your contractor, you must retain 10% until 45 days after substantial performance of the contract. If a lien is registered, the holdback fund is available to satisfy valid claims.
Failing to hold back the required 10% does not eliminate your lien exposure — it can actually increase your personal liability. Keep clear payment records and factor the holdback into your budget from the outset of any renovation or build project.
How a Lien Affects Your Property
A registered lien clouds your title. Practically speaking, this means:
- Your lender may freeze a home equity line of credit or refinance application.
- A real estate sale cannot close cleanly until the lien is discharged.
- Title insurance may not cover liens arising from your own improvement projects.
The longer a lien sits unresolved, the more disruptive and costly it becomes. Legal fees, court proceedings, and delays can add thousands of dollars to a dispute that might have been avoided with proper contracts and payment practices.
How to Protect Yourself Before Work Begins
Prevention is far easier than resolution. Here are practical steps every Ontario homeowner should take before a shovel hits the ground:
- Use written contracts. A detailed contract should specify scope, payment schedule, the 10% holdback, and dispute resolution terms.
- Verify your contractor. Confirm licensing with the relevant provincial body — ESA for electricians, TSSA for gas and fuel equipment, OCOT for other certified trades — and verify active WSIB coverage so you are not liable for workplace injuries.
- Request a statutory declaration. Before releasing the holdback, ask your contractor to sign a declaration confirming all subcontractors and suppliers have been paid.
- Check title before final payment. A title search close to the end of the project can reveal any liens registered during construction.
- Work with verified professionals. Hiring contractors who are properly licensed and registered with bodies like WSIB significantly reduces the risk of unpaid subcontractors creating downstream lien exposure.
What to Do If a Lien Is Registered
If you discover a lien on your property, do not ignore it. First, contact a construction lawyer promptly — Ontario's timelines are unforgiving. You may be able to discharge a lien by paying the disputed amount into court, which removes it from title while the underlying payment dispute is resolved. If the lien was registered improperly or the deadline was missed, your lawyer can bring a motion to vacate it.
Document everything: contracts, invoices, payment receipts, and any written communications with your contractor. This paper trail is your strongest asset in any lien dispute.
The Bottom Line for GTA Homeowners
A construction lien is a legitimate legal tool designed to protect workers and suppliers — but it can create real headaches for homeowners who were unaware of their obligations. Understanding the 10% holdback, the registration timelines, and the importance of hiring verified, properly credentialed tradespeople goes a long way toward keeping your renovation project — and your property title — clean.