How to File a Mechanics Lien in California (2026 Guide)
California subcontractors, material suppliers, and equipment lessors must serve a 20-day preliminary notice within 20 days of first furnishing labor or materials to preserve mechanics lien rights under Cal. Civ. Code § 8200. After completing the work or the project, the claimant must record a Claim of Mechanics Lien with the county recorder's office no later than 90 days after the owner records a Notice of Completion or Cessation, or 90 days from actual completion if no such notice is recorded — under Cal. Civ. Code § 8412 and § 8414. Failing to serve the preliminary notice bars your lien rights entirely on private works. Missing the lien recording deadline extinguishes the lien. There is no cure for either missed deadline.
Who Must File a Mechanics Lien in California?
Any person or entity that furnishes labor, services, equipment, or materials to a California private works construction project has the right to file a mechanics lien under Cal. Civ. Code § 8400. This includes subcontractors of all tiers, material suppliers, equipment lessors, laborers, design professionals, and even some licensed contractors performing work on owner-occupied residential property. General contractors who have a direct contract with the owner do not need to serve a preliminary notice — but every sub-tier claimant below the GC does. If you are a subcontractor, sub-subcontractor, or supplier on a private project in California and you skip the preliminary notice, you have already lost your lien rights before you file anything.
Note: Mechanics liens apply to private construction projects only. Public works projects in California use a different remedy — the stop payment notice and payment bond claim process under Cal. Civ. Code § 9000 et seq.
What Is the 20-Day Preliminary Notice Requirement?
The 20-day preliminary notice is a mandatory prerequisite to filing a mechanics lien in California, governed by Cal. Civ. Code § 8200. You must serve it within 20 days of the date you first furnish labor, materials, or equipment to the project. The notice must be served on three parties: the property owner, the prime contractor (GC), and the construction lender if one exists.
Acceptable service methods under Cal. Civ. Code § 8110–8118:
- USPS Certified Mail with return receipt
- First-class mail with a Certificate of Mailing
- Personal delivery with written acknowledgment
If you miss the 20-day window, you are not completely locked out — but your lien rights are limited to work performed in the 20 days before the date you actually served the notice. So if you are 60 days late serving the notice, you lose lien protection on the first 40 days of your work. On a large contract, that can be the majority of your money. The safest practice is to serve the notice before or on your first day of work, and no later than day 20.
California preliminary notice resources
What Information Goes in the Preliminary Notice?
California's preliminary notice has specific required content under Cal. Civ. Code § 8202. A notice missing required elements can be challenged and disqualified, so use a compliant form.
Required contents:
- A statement that it is a "20-Day Preliminary Notice" under California law
- Name and address of the claimant (your company)
- Name and address of the person who hired you (your direct contract party)
- Description of the labor, services, materials, or equipment provided
- Estimated value or contract amount
- Name and address of the property owner or reputed owner
- Description of the job site sufficient to identify the property (address and/or legal description)
- The following verbatim statutory warning under Cal. Civ. Code § 8202(e):
"NOTICE TO PROPERTY OWNER: If bills are not paid in full for the labor, services, equipment, or materials furnished or to be furnished, a mechanic's lien leading to the loss of your property may be placed on your property if you do not: (1) Timely make payment; (2) Dispute the claim and provide us with the basis for the dispute; or (3) Furnish a bond or other alternatives as set forth in California Civil Code Section 8530."
Using an attorney-reviewed template that includes this language is not optional — it is the difference between a valid lien and a dismissed one.
What Are the Mechanics Lien Filing Deadlines in California?
California has two different lien recording deadlines depending on whether the owner records a Notice of Completion or Notice of Cessation under Cal. Civ. Code § 8182.
| Scenario | Deadline for Subcontractors |
|---|---|
| Owner records a Notice of Completion | 30 days from recording date (Cal. Civ. Code § 8412) |
| Owner records a Notice of Cessation | 30 days from recording date (Cal. Civ. Code § 8412) |
| No Notice of Completion or Cessation recorded | 90 days from actual completion of the work (Cal. Civ. Code § 8414) |
Important: General contractors get 60 days when a Notice of Completion or Cessation is recorded — but subcontractors only get 30 days. Missing this deadline is not recoverable. The lien is void.
Tracking these deadlines across multiple active jobs is where subcontractors get burned. According to Rabbet's 2024 Construction Payments Report, 82% of contractors face payment waits of over 30 days. That means most payment problems are unfolding right inside the window when your lien rights can still be exercised — or lost.
California lien deadline reference
How Do You Record the Mechanics Lien?
Recording a mechanics lien in California means filing a Claim of Mechanics Lien with the county recorder's office in the county where the property is located. Under Cal. Civ. Code § 8416, the claim must contain:
- Your name and address
- The name of the person who hired you
- A description of the work or materials provided
- The last date you furnished labor or materials
- The name of the property owner or reputed owner
- A description of the property sufficient to identify it (address plus APN — Assessor's Parcel Number — is safest)
- The amount claimed (less any credits or offsets)
- A notarized signature
Recording fees vary by county. Most California counties charge between $15 and $25 for the first page and $3 per additional page. Los Angeles County is typically at the higher end.
After recording, you must serve a copy of the recorded lien on the property owner within 15 days of recording, per Cal. Civ. Code § 8416(d). Failure to serve does not void the lien, but it can affect your ability to recover attorney's fees later.
How Long Does a California Mechanics Lien Last?
A recorded mechanics lien in California is enforceable for 90 days from the date of recording under Cal. Civ. Code § 8460. Within that 90-day window, you must file a lawsuit to enforce the lien in superior court, or the lien expires and becomes unenforceable. The 90-day period cannot be extended except in narrow circumstances involving credit agreements documented before the lien is recorded.
This is the step most subcontractors forget. Recording the lien gets attention and creates a cloud on title — but if the GC or owner still refuses to pay and you do not file suit within 90 days, you lose your leverage entirely. The lien silently expires. If you reach this point without payment, consult a California construction attorney.
What Does It Cost to File a Mechanics Lien in California?
Filing a mechanics lien in California involves three direct costs:
Preliminary notice service: Serving via USPS Certified Mail runs approximately $4.85 for the base certified mail fee plus standard postage (per USPS 2026 pricing), or $24.99 through LienFlash, which includes an attorney-reviewed state-compliant form, USPS Certified Mail, and a Certificate of Mailing PDF you can use as proof of service.
County recording fee: Roughly $15–$25 for the first page, plus $3 per additional page, depending on the county.
Enforcement (if needed): Filing a lawsuit in California superior court to enforce a lien requires a filing fee, typically $435 for unlimited civil cases, plus attorney fees if you hire counsel.
The preliminary notice cost is negligible compared to what it protects. If a LienFlash notice at $24.99 preserves your lien rights on a $20,000 subcontract that would otherwise go unpaid, that is roughly an 80,000% return on the filing cost. Skipping it to save $25 makes no financial sense.
What Mistakes Void a California Mechanics Lien?
These are the most common errors that get California mechanics liens dismissed or successfully challenged:
1. Missing the preliminary notice deadline entirely. No preliminary notice = no lien rights. Full stop, under Cal. Civ. Code § 8200.
2. Serving the wrong parties. You must serve the owner, GC, and lender. Serving only the GC when a lender exists is non-compliance.
3. Recording too late. Whether it is 30 days or 90 days depends on whether a Notice of Completion was recorded. Watch both dates on every job.
4. Insufficient property description. A lien that cannot clearly identify the property can be challenged. Always include the street address and APN.
5. Wrong claimant name. The name on the lien must match your licensed contractor name or legal entity name exactly. If you operate as "Garcia Electric Inc." but the lien says "Garcia Electric," that discrepancy can be used against you.
6. Missing the notarization. The Claim of Mechanics Lien must be signed under penalty of perjury and notarized. An unnotarized lien will be rejected by the county recorder.
7. Failing to file suit within 90 days. Recording the lien starts the clock on enforcement. After 90 days without a lawsuit, the lien expires under Cal. Civ. Code § 8460.
According to Rabbet's 2024 Construction Payments Report, slow payments cost the U.S. construction industry an estimated $280 billion in 2024. California subcontractors carrying that financial burden need every legal tool available — and a voided lien is no tool at all.
Frequently Asked Questions
Do I need a preliminary notice if I have a direct contract with the property owner?
No. Under Cal. Civ. Code § 8200, a contractor who has a direct contractual relationship with the property owner is exempt from the preliminary notice requirement. However, if you are a subcontractor — even a first-tier sub with a contract directly with the GC, not the owner — you must serve the preliminary notice. When in doubt, serve it. The cost of serving an unnecessary notice is trivial compared to the cost of missing a required one.
Can I still file a mechanics lien if I missed the 20-day preliminary notice window?
Yes, but your lien rights are limited. Under Cal. Civ. Code § 8200, late service restricts your lien protection to work performed in the 20 days before the date you actually serve the notice. If you never served a notice at all, you cannot file a mechanics lien on a private works project in California. Serve the notice as soon as you realize the oversight — do not wait.
Does the preliminary notice have to be sent by certified mail?
No, but certified mail is the strongest method. Under Cal. Civ. Code § 8110–8118, acceptable service methods include USPS Certified Mail with return receipt, first-class mail with a Certificate of Mailing, or personal delivery with written acknowledgment. First-class mail with a Certificate of Mailing is legally sufficient, but certified mail gives you delivery tracking and is harder to dispute if the recipient claims non-receipt.
What is the difference between a Notice of Completion and a Notice of Cessation?
A Notice of Completion (Cal. Civ. Code § 8182) is recorded by the property owner after the project reaches actual completion. A Notice of Cessation is recorded when work has stopped for a continuous period of at least 30 days. Both notices trigger the shorter 30-day lien deadline for subcontractors (versus 90 days if neither is recorded). Owners sometimes record these notices quickly specifically to compress the window subcontractors have to file liens — so monitor every project for these recordings.
Can I file a mechanics lien on a public construction project in California?
No. Mechanics liens cannot be filed against government-owned property in California. On public works projects, subcontractors and suppliers use the stop payment notice (Cal. Civ. Code § 9350 et seq.) and payment bond claims (Cal. Civ. Code § 9550 et seq.) as their primary payment remedies. The preliminary notice requirements for public works are different from private works and should be reviewed separately.
How do I find out if a Notice of Completion has been recorded?
Check the county recorder's office in the county where the project is located. Most California county recorders have online search portals where you can search by property address or APN. Set a calendar reminder to check at or near project completion on every job. Missing the 30-day window because you did not know a Notice of Completion was recorded is not a legal defense.
What happens after I record the mechanics lien — does the owner have to pay me?
Recording the lien does not force immediate payment, but it creates a cloud on the property's title that prevents the owner from selling or refinancing without resolving the lien. This is significant leverage. Most disputes resolve at this stage. If the owner still refuses to pay, you must file a lawsuit in California superior court to enforce the lien within 90 days of recording, under Cal. Civ. Code § 8460, or the lien expires.
Can a lien waiver take away my right to file a mechanics lien?
Yes. California recognizes four statutory lien waiver forms under Cal. Civ. Code § 8132–8138: conditional and unconditional waivers for progress payments, and conditional and unconditional waivers for final payment. An unconditional waiver — especially for final payment — releases your lien rights permanently once signed. Never sign an unconditional waiver until the check has cleared your bank. Conditional waivers are safe to sign because they are only effective upon receipt of payment.
Protect Your Lien Rights Today
California's mechanics lien process has hard deadlines, mandatory preliminary notice requirements, and zero tolerance for late filings. You do not get a second chance once a deadline passes. LienFlash generates attorney-reviewed, California-compliant preliminary notices and sends them via USPS Certified Mail with a Certificate of Mailing PDF — in under 2 minutes, for $24.99 per notice. Use the free deadline calculator to find your exact filing dates based on your first-furnishing date, then set up your notice before you go back to the job site.
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