Preliminary notice vs. notice of intent to lien

What does a preliminary notice do?

A preliminary notice is served at the startof your work — within 20 days of first furnishing labor or materials (Cal. Civ. Code § 8204). It’s a legal prerequisite: it preserves your right to record a mechanics lien later. No preliminary notice, no lien for most subs and suppliers.

What does a notice of intent to lien do?

A notice of intent to lien comes afteryou’re unpaid. It’s a demand letter that says: pay me by this date or I’ll record a mechanics lien on your property. It isn’t legally required on private works in California, but it frequently gets you paid without the cost and friction of actually recording a lien.

Side-by-side comparison

• Timing— preliminary notice: first 20 days. Notice of intent: later, when you’re owed money.
• Required? — preliminary notice: yes, for most subs and suppliers. Notice of intent: no, optional.
• Purpose — preliminary notice: preserve lien rights. Notice of intent: pressure for payment before recording a lien.
• Consequence of skipping — preliminary notice: usually lose lien rights. Notice of intent: none legally, but you lose a low-cost chance to get paid.

Bottom line: serve the preliminary notice on every job to keep your lien rights alive, and reach for the notice of intent when an invoice goes unpaid.

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.