A Subcontractor’s Guide to Mechanic’s Liens

For something every commercial sub has at their disposal, mechanic's liens are remarkably misunderstood and even more remarkably easy to lose.

The mistake most subs make is treating them as a remedy to apply when payment stalls. By then, the leverage may already be gone because a preliminary notice didn’t go out on time, the Notice of Intent wasn’t sent to the right parties, or the lien filing window started from the wrong trigger date. Each small oversight compromises the most powerful payment-protection tool a sub has—often weeks or months before anyone notices.

This guide gives commercial subs a practical playbook for keeping lien rights alive across every project, in every state, so when payment stalls, the rights are still there when you reach for them.