The deadline to file a builders lien in BC is 45 days from the date a triggering event occurs: (1) issuance of a certificate of completion; (2) completion, termination or abandonment of the head contract, if no certificate of completion; or (3) completion or abandonment of the work, if no head contract.
Under Section 20 of the Builders Lien Act, SBC 1997, c. 45, this deadline is strict and non-extendable. Once the 45-day window closes, the statutory right to file a builders lien in BC is permanently extinguished, regardless of the amount owed. A second triggering event does not restart the clock. This article explains every triggering event that starts the 45-day countdown, how the deadline applies differently to contractors, subcontractors, and suppliers, and the consequences of filing one day late.
When Does the 45-Day Builders Lien Filing Deadline Start in BC
The 45-day filing deadline starts on the date of the first triggering event under Section 20 of the Builders Lien Act: (1) issuance of a certificate of completion; (2) completion, termination or abandonment of the head contract, if no certificate of completion; or (3) completion or abandonment of the work, if no head contract.
Section 20 of the Builders Lien Act establishes the filing window. If the property owner engaged a head contractor, the 45-day period runs from the date the head contract is completed, abandoned, or terminated, unless a certificate of completion is issued to the specific subcontract. If the owner did not engage a head contractor (direct hires only), the deadline runs from the date the improvement itself is completed or abandoned. These triggering events are mutually exclusive: whichever occurs first starts the clock, and a subsequent event does not reset or extend it.
The distinction between “contract” and “improvement” is critical. A head contract is the primary agreement between the owner and the general contractor. An improvement is the physical work on the land. In projects with a head contractor, the head contract usually governs the timeline. In projects without one, the physical state of the improvement governs. Misidentifying which event controls the deadline is one of the most common errors in builders lien filings. For the step-by-step process of preparing and submitting Form 5 once the decision to file is made, see the complete guide on how to file a builders lien in BC. Contractors dealing with broader payment disputes may also benefit from understanding construction disputes in BC and how lien claims interact with contract enforcement.
Completion, Termination, and Abandonment: The Three Deadline Triggers
Three distinct events trigger the builders lien filing deadline in BC: substantial completion of the contract or improvement, termination of the contract by either party, and deemed abandonment after 30 consecutive days of no work on the project.
Substantial Completion
The Builders Lien Act defines “completed” as substantially completed or performed, not totally completed. A head contract, contract, or subcontract is substantially performed when the remaining work can be completed or corrected at a cost of no more than 3% of the first $500,000 of the contract price, 2% of the next $500,000, and 1% of the balance. For improvements (rather than contracts), the test is whether the improvement or a substantial part of the improvement is ready for use or is being used for its intended purpose. A building occupied by tenants, a road carrying traffic, or a system delivering water all meet this threshold, even if punch-list items remain outstanding.
Termination
Termination occurs when a party ends the head contract. The owner fires the head contractor, or the head contractor walks off the job citing non-payment, or a mutual termination agreement is signed. Each of these events starts the 45-day builders lien filing clock on the date the termination takes effect for all parties on the project. The reason for termination is irrelevant to the deadline calculation.
However, if a subcontractor terminates their individual subcontract early, this does not trigger the 45-day window for the project; unless a formal Certificate of Completion is issued for that specific subcontract, the subcontractor’s lien clock remains tied to the ultimate termination, abandonment, or completion of the head contract.
Deemed Abandonment
Under the Builders Lien Act, a contract or improvement is deemed abandoned after 30 consecutive days during which no work is performed in connection with the contract or improvement. Exceptions exist for delays caused by strikes, lockouts, sickness, weather conditions, holidays, court orders, and material shortages. If none of these exceptions apply and the site sits idle for 30 days, the 45-day filing deadline begins running automatically on day 31, whether or not either party formally declares the project abandoned.
Certificates of Completion and How They Affect the Filing Deadline
A certificate of completion issued under Section 7 of the Builders Lien Act overrides all other triggering events and starts a distinct 45-day filing deadline for every party whose work falls under the certified contract or subcontract, regardless of whether that individual work is actually finished.
The certificate of completion is a formal document issued at the request of a contractor or subcontractor, or on the determination of a payment certifier. The BC Law Institute’s analysis of certificates of completion explains the procedure: the payment certifier (or the owner and head contractor jointly if there is no certifier) issues the certificate. Crucially, the issuer must deliver a copy to the owner, head contractor, if any, and the person at whose request the certificate was issued and prominently post the certificate on the construction site within 7 days. Once the certificate is issued, the 45-day filing deadline starts for all lien claimants whose work relates to the certified contract or subcontract. A subcontractor who has not yet completed punch-list work, a supplier with a final delivery scheduled, or a worker with hours outstanding all face the same 45-day countdown from the certificate date.
This mechanism creates strategic implications. An owner or head contractor who wants to accelerate the lien filing window and trigger the progressive release of holdback applies for a certificate of completion, which forces all potential lien claimants under that specific scope to file within 45 days or lose their rights. Contractors and subcontractors must monitor physical job site—and their incoming mail—for certificates of completion issued against the project, rather than relying on the Land Title Office alerts. Missing the proper posting of a certificate is not a valid excuse for filing late.
Different Filing Deadlines for Contractors, Subcontractors, and Suppliers
All lien claimants, whether contractors, subcontractors, workers, or material suppliers, share the same 45-day filing window, but the triggering event that starts the clock varies depending on whether a head contract governs the project and whether a certificate of completion has been issued.
If the owner hired a head contractor, all parties file within 45 days of the head contract’s completion, termination, or abandonment. A subcontractor who finished work 6 months before the head contract was completed still has the full 45 days from the head contract’s triggering event. A material supplier who delivered materials on day one of the project has the same deadline as a finishing contractor who worked on the final punch list. The triggering event is the same for everyone on the project. The owner’s statutory holdback obligations run in parallel: the 10% holdback cannot be released until 55 days after substantial completion, providing a buffer that covers the 45-day filing period plus 10 additional days.
If the owner did not engage a head contractor and instead hired trades directly, each contractor’s deadline runs from the completion or abandonment of the improvement itself. This scenario is common in smaller residential projects where the homeowner manages the trades individually. The BC Law Institute’s chapter on filing timelines and holdback release provides the authoritative analysis of how these parallel deadlines interact in multi-contract projects without a head contractor.
What Happens If You Miss the Builders Lien Filing Deadline
Missing the 45-day builders lien filing deadline permanently extinguishes the lien right under the Builders Lien Act, eliminating the claimant’s ability to register a charge against the property title, with no provision for extension, reinstatement, or late filing.
The consequences are absolute. A claimant who files on day 46 will entitle the property owner to remove the lien. No court in BC has jurisdiction to extend the 45-day deadline. No equitable argument, no hardship claim, and no demonstration of the debt’s validity changes the outcome. The deadline is statutory, and the statute provides no discretion. The claimant’s lien right, and any ability to affect property title through a registered builders lien, is permanently gone.
The claimant retains other legal remedies. A breach of contract claim, a quantum meruit claim for the value of work performed, or a trust claim under the Builders Lien Act remain available. These claims proceed through the civil courts as personal actions against the debtor, not as charges against the land. The practical difference is significant: a builders lien gives the claimant a secured interest in a specific property, while a breach of contract claim produces a monetary judgment that the claimant must then collect from the debtor’s assets. Enforcement of an unsecured judgment is slower, more expensive, and less certain. For a full explanation of the methods available when a lien has been missed or needs to be contested, see the guide on builders lien removal and cancellation in BC.
Strategic Timing: When to File Your Builders Lien Before the Deadline Expires
Filing a builders lien early in the 45-day window maximizes the claimant’s negotiating position and eliminates the risk of miscalculating the triggering event date, while filing close to the deadline risks permanent loss of the lien right if the triggering event occurred earlier than the claimant estimated.
The most common mistake is waiting too long. A claimant calculates the deadline based on their own understanding of when the contract was completed, only to discover that the owner filed a certificate of completion weeks earlier, or that a deemed abandonment period had already started the clock. The safest approach is to file the builders lien as soon as a payment dispute becomes apparent, rather than waiting for the deadline to approach. Filing the lien does not prevent continued negotiation. The lien can be discharged at any time if the payment dispute is resolved.
The LTSA Land Title Practice Manual on Section 20 filing timelines details the registration process and the documents that appear on title. Subcontractors and suppliers who rely on the head contractor for project status updates are at particular risk. A head contractor who fails to communicate a certificate of completion or a contract termination leaves subcontractors unaware that the 45-day clock is already running.
Frequently Asked Questions
Does the 45-day builders lien deadline reset if a second triggering event occurs?
The 45-day deadline does not reset. Under Section 20 of the Builders Lien Act, the first triggering event starts the clock, and a subsequent event does not restart or extend the filing period.
What counts as “substantial completion” for a builders lien filing deadline in BC?
A contract is substantially completed when the remaining work can be finished at a cost of no more than 3% of the first $500,000 of the contract price, 2% of the next $500,000, and 1% of the balance. For improvements (physical work on land), the test is whether the improvement or a substantial part of the improvement is ready for use or is being used for its intended purpose. Punch-list items and minor deficiencies do not prevent a finding of substantial completion.
Can a property owner force the builders lien filing deadline to start earlier?
A property owner can apply for a certificate of completion under Section 7 of the Builders Lien Act, which starts the 45-day filing deadline for all lien claimants on the project. The certificate takes effect on the date specified, regardless of whether the physical work is finished. This mechanism allows owners and head contractors, if any, to accelerate the lien filing window and clear potential encumbrances from title sooner.
Do I lose all legal options if I miss the builders lien filing deadline?
Missing the filing deadline extinguishes the builders lien right, but other legal remedies remain available. A breach of contract claim, a quantum meruit claim (for the value of work performed), and a trust claim under the Builders Lien Act all proceed through the civil courts as personal actions against the debtor. These remedies produce monetary judgments rather than secured charges against the property. An experienced construction lien lawyer can evaluate which remedies apply to a specific payment dispute after the lien deadline has passed.
When does deemed abandonment start the builders lien filing clock?
A contract or improvement is deemed abandoned after 30 consecutive days of inactivity on the project. The 45-day filing deadline begins on day 31. Exceptions exist for delays caused by strikes, lockouts, sickness, weather conditions, holidays, court orders, and material shortages. If none of these exceptions apply and no work is performed for 30 consecutive days, the filing clock starts automatically.
Speak With a BC Construction Lien Lawyer
Builders lien deadlines in BC are strict, and small mistakes can affect your ability to recover payment. If you are preparing to file a lien, dealing with a disputed deadline, or responding to a lien registered against your property, ATAC LAW can help you assess your options before important deadlines pass.
Contact ATAC LAW to speak with a construction lawyer in British Columbia.
