Can you file a lien without a preliminary notice?

The short answer: usually no. California conditions your mechanics lien on having served a preliminary notice — Cal. Civ. Code § 8410 says a claimant may enforce a lien only if they gave the notice required by § 8200. No prelim, no lien, no matter how valid the debt.

But “usually” is doing real work in that sentence. There are exceptions, and — more importantly for most subs reading this — a late notice still protects most ongoing jobs.

The exceptions

• Wage laborers— workers claiming for their own labor don’t need a preliminary notice (§ 8200(e)).
• Direct contractors— if you contract directly with the owner, you don’t need to notify the owner. You only need to give notice to the construction lender, if the project has one (§ 8200(e)).

If you’re a subcontractor or supplier — hired by the GC or by another sub — neither exception helps you. You need the notice.

Missed the 20 days? Serve it anyway.

This is the part most subs don’t know. A preliminary notice served late is not void — it protects the labor and materials you furnish from 20 days before service onward (§ 8204). Only the work furnished before that rolling window loses lien protection.

Concretely: if you’re three months into a six-month job and serve today, everything from 20 days ago through the end of the job is protected. On most ongoing jobs, that’s the bulk of the contract value. The only truly bad outcome is never serving at all.

What if the job is already finished and I never served one?

Then a mechanics lien is likely off the table, but you are not out of options: you can still demand payment, pursue breach of contract, use small claims court for smaller amounts, or leverage the Prompt Payment Act’s penalties. For significant amounts, talk to a California construction attorney about your specific facts.

This page is general information, not legal advice, and does not create an attorney–client relationship. California lien and notice deadlines are strict and fact-specific — “completion” alone can be triggered by actual completion, the owner’s occupancy or use, or a 60-day cessation of labor. Notice Harbor is not a law firm. Confirm any deadline that matters to your claim with a licensed California construction attorney.