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Construction Liens for Ontario Homeowners
Ontario Construction ActHomeowner lien responseTitle, holdback + deadlines
Construction Liens for Ontario Homeowners: What to Do Immediately
A construction lien can freeze a sale, complicate refinancing and alarm a lender—but it does not prove the claimant is right. The homeowner’s job is to protect the holdback, preserve the documents, identify the payment chain, verify the statutory dates and obtain legal advice before paying, settling or releasing money.
60 daysTypical current preservation period
90 daysTypical perfection period after last preservation day
10%Basic statutory holdback
Not proofRegistration does not establish the debt
Do not calculate a lien deadline from the last invoice.
The trigger may be publication of substantial performance, last supply, completion, abandonment, termination or subcontract certification. The correct date depends on the claimant and project facts.
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What a registered construction lien means—and does not mean
It is a security claimThe claimant says unpaid services or materials improved the property and seeks security against the owner’s interest and applicable holdback.
It is not proof of debtRegistration does not prove the invoice is correct, the work was authorized, the amount is owing or the claimant will win.
It can affect titleA preserved claim registered on title can interfere with a sale, refinancing or construction-loan draw until discharged, vacated or otherwise resolved.
It has strict deadlinesPreservation, perfection and expiry depend on statutory trigger dates—not simply the date printed on the invoice.
A registered lien is a claim, not a judgment. The claimant still has to preserve and perfect it correctly and prove entitlement, amount and priority if the matter is litigated.
Eight immediate homeowner steps
1Save every documentPreserve the lien, written notice, envelope, email, title search and all attachments exactly as received.
2Call a construction lawyerDeadline and liability analysis should begin immediately, especially if a closing, refinance or lender draw is pending.
3Stop casual paymentsDo not pay the claimant, release holdback or promise settlement before the payment chain and legal exposure are reviewed.
4Build the payment ledgerList contract price, approved changes, invoices, payments, holdback, disputed work and balance remaining.
5Identify the claimantContractor, subcontractor, supplier, worker, equipment provider, consultant or another person in the construction chain.
6Confirm the project datesFirst supply, last supply, substantial-performance publication, completion, abandonment and termination.
7Notify affected partiesSend the document promptly to the contractor, lender and project lawyer where appropriate; preserve contractual notice rights.
8Protect the scheduleDocument what work can continue safely while the financial and title problem is addressed.
Who can claim against the property?
| Claimant | Direct contract with homeowner? | Possible lien basis | Homeowner’s first check |
|---|---|---|---|
| General contractor | Usually yes | Unpaid contract work, approved changes or other lienable services and materials. | Contract accounting, deficiencies, payment notices and holdback. |
| Subcontractor | Usually no | Services or materials supplied under the contractor or another subcontractor. | Who hired the trade, what was supplied, contractor payment and class holdback. |
| Material supplier | Often no | Materials supplied to or used in making the improvement. | Delivery records, project destination, quantity, returns and payment chain. |
| Equipment provider | Sometimes | Qualifying supply connected to the improvement; equipment with an operator is expressly included as a service. | Dates, operator, location, hours and hiring party. |
| Architect or designer | Sometimes | Qualifying design, plan, drawing or specification services; 2026 rules also address certain planned improvements not commenced. | Retainer, deliverables, holdback and whether the work enhanced the land interest. |
| Worker or workers’ fund | Usually no | Labour supplied to the improvement under statutory rules. | Employer, payroll period and last-supply date. |
How homeowner exposure is limited
Lien amount is not automatic liabilityA CAD $100,000 registration does not itself establish that the homeowner owes CAD $100,000.
Claimed amount ≠ proven owner liabilityRequired holdbackIllustrative CAD $500,000 of services and materials actually supplied.
CAD $500,000 × 10% = CAD $50,000 holdbackPayment-chain limitationThe Act limits lien value through amounts owing in the relevant payment chain, subject to holdback rules.
Claim is tested against debt + holdback structureVacating securityOne statutory route uses the claimed amount plus costs security.
Claim + lesser of CAD $250,000 or 25% of claimThe homeowner is not automatically responsible for every unpaid subcontractor invoice. Where the contractor is the defaulting payer, section 23 generally limits the owner’s personal liability to the holdback the owner was required to retain. The complete facts still require legal analysis.
Preservation, perfection and title removal
| Stage | What happens | Important homeowner point |
|---|---|---|
| Lien arises | The lien takes effect when the person first supplies qualifying services or materials. | The right can exist before anything appears on title. |
| Written notice of lien | The claimant serves the prescribed written notice, currently Form 1, which can bind funds in the payment chain. | A written notice is serious but is not the same thing as registration of a claim for lien. |
| Preservation | Where the lien attaches to land, the claimant generally preserves it by registering the prescribed claim for lien against title within the applicable 60-day period. | Verify the correct statutory trigger and claimant category. |
| Perfection | The claimant generally commences the lien action and registers a certificate of action within 90 days after the last day the lien could have been preserved. | A preserved lien can expire if not perfected on time. |
| Discharge | The claimant registers the prescribed release or withdraws the written notice. | Payment alone does not clean title unless the discharge is completed. |
| Vacating by security | A court order can remove the registration from title after money or security is posted. | The lien claim may continue against the posted security rather than the house. |
| Expired registration | A court can declare an unpreserved, unperfected or expired lien invalid and order the registration vacated. | Expiry does not necessarily erase the title entry automatically. |
Twelve records your lawyer will need
1
Signed contract
Original price, scope, holdback, payment, change and dispute clauses.
Original price, scope, holdback, payment, change and dispute clauses.
2
Approved change orders
Only documented changes should be added to the contract accounting.
Only documented changes should be added to the contract accounting.
3
Invoice register
Every invoice, date, amount, tax, holdback and approval status.
Every invoice, date, amount, tax, holdback and approval status.
4
Payment proof
Cancelled cheques, transfers, receipts and lender advances.
Cancelled cheques, transfers, receipts and lender advances.
5
Holdback ledger
10% retained as services or materials were actually supplied.
10% retained as services or materials were actually supplied.
6
Claim for lien
Registration number, claimant, amount, legal description and dates.
Registration number, claimant, amount, legal description and dates.
7
Written notice of lien
Current Form 1 or other served document and service details.
Current Form 1 or other served document and service details.
8
Subcontractor list
Trade names, contract values, payment status and last-supply information.
Trade names, contract values, payment status and last-supply information.
9
Site records
Daily reports, photographs, delivery slips, deficiencies and completion evidence.
Daily reports, photographs, delivery slips, deficiencies and completion evidence.
10
Title and court searches
Current searches interpreted with the project’s preservation and perfection dates.
Current searches interpreted with the project’s preservation and perfection dates.
11
Substantial-performance record
Certificate or declaration and proof of publication, if any.
Certificate or declaration and proof of publication, if any.
12
Termination record
Notice, effective date and required publication if the contract ended.
Notice, effective date and required publication if the contract ended.
Do not use this response
Bad homeowner response
“I paid the builder in full, so your lien is invalid. Remove it today or I will sue you. I will release the remaining holdback to finish the house.”
Better first written response
“We acknowledge receipt of your lien document without admitting liability, amount, validity, priority or timeliness. Please provide the contract or purchase order under which you supplied, invoices, payment history, first- and last-supply dates, delivery or work records, change authorization and the calculation of the amount claimed. All rights are reserved. Our Ontario construction lawyer will respond regarding payment, holdback, discharge or other next steps.”
Educational example only. Do not send a template response when a legal deadline, sale, refinance or lender advance is involved. Have the actual document reviewed immediately.
The most dangerous lien mistake is paying first and sorting out the discharge later.
Upload My Project DocumentsUpload the contract, invoices, payments and lien documents. The Free Scan finds contract risks; the Full Review is $99.99.
Eight homeowner lien red flags
!
The claimant demands immediate direct payment
Paying a subcontractor without a lawyer-approved release and credit structure can create double-payment or priority problems.
Paying a subcontractor without a lawyer-approved release and credit structure can create double-payment or priority problems.
!
The contractor says to ignore it
A contractor’s promise to handle the lien does not remove the title registration or protect an approaching deadline.
A contractor’s promise to handle the lien does not remove the title registration or protect an approaching deadline.
!
The amount equals the full unpaid invoice
The lien amount and owner exposure are not automatically the same; holdback, payment-chain limits, set-off and validity matter.
The lien amount and owner exposure are not automatically the same; holdback, payment-chain limits, set-off and validity matter.
!
No holdback was retained
The owner may face avoidable personal exposure to valid lien claimants for required holdback.
The owner may face avoidable personal exposure to valid lien claimants for required holdback.
!
The lender freezes all draws
This may be a practical lender response, but it is not itself proof that the entire lien amount is valid.
This may be a practical lender response, but it is not itself proof that the entire lien amount is valid.
!
The registration is expired but still on title
Expiry does not necessarily remove the registration automatically; a discharge or court order may still be needed.
Expiry does not necessarily remove the registration automatically; a discharge or court order may still be needed.
!
A release is promised after payment
Do not send money without approved discharge documents, payment conditions and registration responsibility.
Do not send money without approved discharge documents, payment conditions and registration responsibility.
!
The owner uses holdback to hire a replacement contractor
After abandonment or termination, statutory holdback cannot be used for replacement work or other claims until potential liens are dealt with.
After abandonment or termination, statutory holdback cannot be used for replacement work or other claims until potential liens are dealt with.
Important Ontario legal rules
- Creation: A person supplying services or materials to an improvement for an owner, contractor or subcontractor has a lien on the owner’s interest for the price of those services or materials.
- Value limits: The lien is limited to the amount owing to the claimant and, subject to holdback, the applicable amount owing in the payment chain.
- Owner personal liability: Where the contractor is the defaulting payer, the owner’s personal liability to a valid lien claimant generally does not exceed the holdback the owner was required to retain.
- Preservation: The current Act generally uses a 60-day period, but the trigger differs by claimant and may involve publication, last supply, completion, abandonment, termination or subcontract certification.
- Perfection: A preserved lien generally expires unless perfected within 90 days after the last day on which it could have been preserved.
- False or exaggerated claims: A claimant can be liable for damages for knowingly or recklessly preserving a lien it does not have or wilfully exaggerating the amount.
- Other claims can survive: Expiration of lien rights does not necessarily eliminate other legal or equitable remedies.
- Current forms: Ontario Court Services lists a revised Form 1 Written Notice of Lien effective January 1, 2026.
This page cannot calculate your deadline.
The contract date, transition rules, claimant category, project events, notices and title registration must be reviewed by an Ontario construction lawyer.
Official references: Ontario Construction Act, O. Reg. 303/18—forms, O. Reg. 302/18—lien actions, and Ontario Court Services construction forms.
Twenty-four questions to answer immediately
1
Who registered or served the lien?
2
Who hired the claimant?
3
What work or material is claimed?
4
Was that work actually supplied?
5
Was the work included in the original scope?
6
Was any change authorized?
7
What amount was invoiced?
8
What amount was paid?
9
What holdback was retained?
10
What remains owing to the contractor?
11
When did the claimant first supply?
12
When did the claimant last supply?
13
Was substantial performance published?
14
Was the contract completed?
15
Was it abandoned or terminated?
16
Was a termination notice published?
17
Was the lien preserved in time?
18
Was it perfected in time?
19
Does it attach to the correct property?
20
Is the amount exaggerated or duplicated?
21
Is a sale or refinance pending?
22
Has the lender been notified?
23
Can the lien be discharged or vacated?
24
What settlement releases are required?
Contract Centre and related guides
Construction lien FAQ for homeowners
Does a construction lien mean I owe the subcontractor?
No. A lien is security for an alleged unpaid construction claim. Registration does not prove the debt, establish the amount or automatically make the homeowner liable for every subcontractor invoice.
Can a subcontractor lien my home when I paid the general contractor?
Potentially, yes. A person supplying services or materials under the construction chain may have lien rights even without a direct contract with the homeowner. The owner’s holdback and payment records are central to the liability analysis.
How long does an Ontario claimant have to register a lien?
The current Act generally uses a 60-day preservation period, but the starting event differs for contractors and other claimants and can involve publication, last supply, completion, abandonment or termination. Never calculate from the invoice date alone.
What does it mean to perfect a lien?
A preserved lien generally must be perfected within the statutory period by commencing the lien action and, where it attaches to land, registering the required certificate of action. The current perfection period is generally 90 days after the last day the lien could have been preserved.
Will an expired lien disappear from title automatically?
Not necessarily. A registered claim may require a discharge, release or court order even after the underlying lien has expired. A construction lawyer should confirm the proper removal procedure.
Can I pay money into court to remove the lien from title?
A court may vacate a lien registration after payment into court or posting security. One statutory route uses the full claimed amount plus costs security equal to the lesser of CAD $250,000 or 25% of the claim; the court may also set a reasonable amount in appropriate circumstances.
Can I keep the lien holdback for deficiencies?
Statutory holdback protects lien claims. A separate contractual deficiency retention may be available, but the entire holdback should not automatically become a permanent deficiency fund.
Can a claimant sue after the lien expires?
Expiry of the lien does not necessarily eliminate every underlying contract or equitable claim. Section 38 preserves other legal or equitable rights that may otherwise be available.
A lien is urgent—but urgency is not permission to pay blindly
Upload the contract, changes, invoices, payment ledger, holdback record and lien documents. Start with the Free Scan. The complete builder-reviewed Full Report is $99.99, and an independent Ontario construction lawyer can review legal issues from $499.99.
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Reviewed July 30, 2026. General educational information only. This page is not legal advice, a title opinion, a lien-validity opinion or a deadline calculation.
