Guides
Canadian Fence Contractor Lien Rights: What Ontario's Construction Act Says
Canadian fence contractor lien rights in Ontario have 60-day preservation and 90-day perfection deadlines, plus a 10% holdback rule rarely explained.
What to take away
- Ontario's Construction Act gives fence contractors lien rights for work that improves land, but the right expires if deadlines are missed.
- A lien is preserved by registering a claim for lien and giving a copy to the owner, then perfected by starting a court action.
- Municipal fence bylaws and private contracts affect the job, but only the provincial statute decides whether a lien survives.
- Missing the preservation or perfection window can extinguish the right to collect from the property, even when the owner owes money.
Who has jurisdiction over a fence lien
Three sets of rules sit over a fence project in Ontario. The provincial Construction Act creates the lien right, the holdback and the deadlines. Municipal bylaws govern height, setbacks, pools and permits. Private agreements and property line rules decide what the owner approved. Only the provincial statute decides whether a lien survives.
The full text of Ontario's Construction Act sets out these rights without regard to municipal fence permit decisions. Municipal fence rules can vary by city, and provincial building codes do not change the provincial lien clock. A fence contractor can have a valid lien even when the city later says a fence height was not allowed.
What triggers a lien right
A fence contractor who supplies services or materials to an improvement under a contract with the owner has a lien. The right arises when the first post hole is dug, panels are delivered or concrete is poured, not when an invoice is sent. For fence work, the improvement includes posts, panels, gates, concrete and excavated holes. It attaches to the owner's interest in the land, so the property itself becomes security for payment.
A clear written contract helps, but it does not replace the lien. For payment schedule issues, see How Much Deposit. The deposit article explains what owners often expect and what a contractor can legally protect.
What to submit to preserve a lien
- Prepare a claim for lien that names the owner, the property address, the amount owed and the dates of supply.
- Register the claim for lien in the proper land registry office for the county or district where the property is located.
- Deliver a copy of the registered claim to the owner within the same preservation period.
- Keep proof of registration and delivery, because perfection later requires a filed court action and a certificate of action.
The regulation under the Construction Act specifies the forms and registration steps. A claim for lien is not a permit application, but it must meet the same kind of formal requirements. If the land is in Toronto, the registry is different from the one for a rural township.
How long each deadline runs
| Deadline | Period | Starts | Consequence |
|---|---|---|---|
| Preserve lien | 60 days | Certificate of substantial performance published, or contract completed or abandoned if no certificate | Lien expires if not preserved |
| Perfect lien | 90 days | Final day to preserve the lien | Lien expires if not perfected |
| Owner holdback | 10% of value | First supply of services or materials | Owner must retain until liens are satisfied or expired |
A fence project that starts late in the year can still hit these dates, even when Winter Installation delays excavation. The clock does not pause for frozen ground or a delayed building permit.
Ontario Fence Lien Deadlines
- Day 0First supply or substantial performance
- Day 60Preserve lien by registering claim
- Day 90Perfect lien by filing court action
- OngoingOwner holds back 10% of value
What happens if you skip a deadline
If you miss the preservation window, the lien expires. You cannot register it later, and the court cannot grant a lien remedy. The owner can sell or refinance the property without clearing your claim. You may still sue for breach of contract, but that is an unsecured claim against a person, not a charge against the land.
The same deadlines apply whether the job is Commercial vs Residential Fence Contracting. An owner who still owes money after the lien has expired can simply wait you out. That is the consequence nobody mentions until afterwards.
A fence contractor who misses the 60-day preservation window usually loses the lien, even if the owner later admits the debt.
Example: a fence job in Ottawa
A contractor installs a cedar fence in Ottawa on May 15 and finishes on May 30. No certificate of substantial performance is published. The preservation deadline runs 60 days after completion or abandonment, so the contractor has until late July to register a claim for lien. If the contractor waits until an August invoice dispute, the lien is gone. A court action cannot bring it back.
