California mechanics lien requirements
What a valid claim must contain, who can file, and how to record and serve it.
A mechanics lien only protects you if it’s done right. California sets specific requirements for who can claim, what the claim must say, and how it must be recorded and served. Here’s the checklist under Cal. Civ. Code §§ 8410–8424.
1. You must have lien rights
For most subcontractors and suppliers, that means serving a valid preliminary notice within 20 days of first furnishing labor or materials (Cal. Civ. Code § 8200). Skip the preliminary notice and there’s usually no lien to record.
2. The claim must contain the required contents
Under Cal. Civ. Code § 8416, the Claim of Mechanics Lien must include:
- The amount of the claim (the sum you’re owed)
- The name of the owner or reputed owner
- A general statement of the work or materials you provided
- The name of the person who hired you
- A description of the property to be liened
- A proof of service affidavit showing service on the owner
3. It must be verified — but not notarized
The claim must be verified, meaning signed under penalty of perjury. California does not require a notary — the verified signature satisfies § 8416(a).
4. The amount can’t be inflated
Your lien can’t exceed the reasonable value of what you furnished minus payments received. Willfully overstating the amount can render the whole lien unenforceable, so claim only what you’re truly owed.
5. Record on time and serve the owner
Record the claim at the county recorder within your lien deadline (90 days from completion, or 30/60 days after a Notice of Completion), and serve a copy on the owner. Both steps are required for a valid, enforceable lien.
Frequently asked questions
Related guides
Protect your payment rights in minutes
Notice Harbor prepares and mails your California preliminary notice by Certified Mail, then tracks every deadline. Your first notice is free.
Start your free noticeThis 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.