Avoid Construction Lien Filing Errors

Filing a construction lien in Ontario doesn't have to be stressful. Many contractors lose time and money due to simple errors that invalidate claims or delay payments—avoid them with these simple suggestions from Lien Master.

5 Common Lien Filing Mistakes (And Fixes)

1. Wrong property details: Using an incomplete PIN or street address mismatches Electronic Land Titles records, risking rejection.

   Fix: Lien Master will double-check via the Land Titles Systems; just give us the address of the Property and the owner's identity if you know it.

   
   

2. Inaccurate amount claimed: Over- or under-stating (forgetting HST or extras) weakens your position in disputes.

   Fix: Use detailed invoices; break down labour, materials, and taxes precisely.

   
   

3. Missing lien deadlines: Filing after 60 days from last supply or abandonment of the contract triggers automatic expiry.

   Fix: Use our Lien Deadline Calculator; set alerts for substantial performance.

   
   

4. Incomplete claimant info: Omitting business number or contact details slows owner response.

   Fix: List full legal name, GST/HST#, and service address every time.

   
   

5. No supporting docs attached: Lacking invoices or contracts invites challenges during perfection.

   Fix: Reference docs in the claim; keep digital copies ready.

   
   

Spot these issues early, and your lien resolves faster—often without having to go to court. Lien Master reviews filings for accuracy, ensuring compliance with the Construction Act. Contact us for a free check today!

If you want to get started fast, provide all the relevant property and contractual details using this intake form.

Published April 25, 2026 | Lien Master