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How to File a Mechanics Lien in California 

by | Apr 5, 2026 | Uncategorized |

When construction work is completed but payment is delayed or withheld, California law provides a remedy known as a mechanics lien. A properly recorded mechanics lien places a claim against the property being improved and can ultimately lead to foreclosure if the debt remains unpaid. Understanding the mechanics lien process is critical for anyone involved in construction or property improvement. 

What is a Mechanics Lien? 

A mechanics lien is a legal claim recorded against real property by a contractor, subcontractor, laborer, or material supplier who has not been paid for work or materials provided for a construction project. 

Once recorded, the lien becomes part of the property’s title and may prevent the owner from selling, refinancing, or borrowing against the property until the debt is resolved. If the lien remains unpaid, the claimant may file a lien foreclosure action, which can force the sale of the property to satisfy the debt.  

Can I File a Mechanics Lien? 

California law allows several parties involved in a construction project to file a mechanics lien if they remain unpaid, including: 

  1. Direct contractors (prime contractors) 
  2. Subcontractors 
  3. Laborers 
  4. Material suppliers 
  5. Equipment lessors 

Even if a property owner has already paid the direct contractor, subcontractors or suppliers may still have lien rights if they were not paid. 

Steps for Filing a Mechanics Lien 

  • Serve a Preliminary Notice 

In most cases, a claimant must first serve a 20-day preliminary notice before filing a mechanics lien. This notice informs the property owner, general contractor, and construction lender that the claimant is providing labor, services, equipment, or materials to the project and reserves the right to file a lien if unpaid. 

The preliminary notice must generally be served within 20 days after the claimant first provides labor or materials. If the notice is served late, the claimant may only recover for work performed within the 20 days before the notice was served and thereafter. Direct contractors and laborers are generally exempt from the preliminary notice requirement. 

  • Prepare the Claim of Mechanics Lien 

The claimant must complete a Claim of Mechanics Lien that includes specific information required by California law, such as: 

  • The claimant’s name and address 
  • The property owner’s name 
  • A description of the property 
  • The name of the party who hired the claimant 
  • The amount owed for labor or materials 
  • A description of the work performed or materials provided 

The lien must also include a Notice of Mechanics Lien warning the property owner that the lien has been recorded. 

  • Record the Mechanics Lien 

The claimant must record the mechanics lien with the county recorder’s office in the county where the property is located. Recording fees vary by county. Once recorded, the lien becomes part of the public record.  

  • Serve the Mechanics Lien on the Property Owner 

After recording the lien, the claimant must serve a copy of the mechanics lien on the property owner. The lien must include a Proof of Service Affidavit confirming that the property owner was properly served. California law requires the recorded lien to include this signed affidavit.  

  • Meet the Filing Deadline 

Timing is critical when filing a mechanics lien. In most cases, the lien must be recorded within 90 days after completion of the work of improvement. However, if the property owner records a Notice of Completion or Notice of Cessation, the deadline may be shortened. Failure to record the lien within the required time frame may result in the loss of lien rights. 

  • File a Lien Foreclosure Action 

Recording the lien is not the final step. To enforce the lien, the claimant must file a lien foreclosure lawsuit. Under California law, the claimant must file this lawsuit within 90 days after recording the mechanics lien. If the claimant fails to do so, the lien becomes unenforceable. 

Waiver and Release Forms under California Law

California law also provides specific waiver and release forms that are commonly used during construction projects. These forms allow claimants to release lien rights in exchange for payment. 

The four statutory forms include: 

  1. Conditional Waiver and Release Upon Progress Payment 
  2. Unconditional Waiver and Release Upon Progress Payment 
  3. Conditional Waiver and Release Upon Final Payment 
  4. Unconditional Waiver and Release Upon Final Payment 

A mechanics lien is a powerful tool that helps contractors, subcontractors, laborers, and suppliers secure payment for work performed on construction projects. However, California mechanics lien law includes strict notice requirements, deadlines, and procedural rules. Failure to follow these requirements can result in the loss of lien rights. Because the process can be complex, parties involved in payment disputes should carefully evaluate their options and consider seeking legal guidance. If you have questions about mechanics liens or construction payment disputes, please contact our office to schedule a consultation with an attorney.  

Disclaimer: The information contained on this website and in this article is for general information purposes only and is not intended to be, nor should it be interpreted as, legal advice or a substitute for legal counsel. Transmission of this information is not intended to create, and receipt does not constitute, an attorney-client relationship. While we strive to ensure the information is accurate and up-to-date, we make no representations or warranties of any kind, express or implied, about the completeness, accuracy, or reliability of this information. Any reliance you place on such material is strictly at your own risk. 

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