When a contractor, subcontractor, or material supplier isn’t getting paid on a California construction project, time is critical. Two of the most effective legal tools for securing payment are the mechanic’s lien and the stop payment notice. These remedies serve different purposes, target different assets, and carry different procedural requirements. Understanding which to use—and when—can make the difference between recovering what you’re owed and losing your rights entirely.

What Is a Mechanic’s Lien in California?

A mechanic’s lien is a claim recorded against the real property where work was performed. It “attaches” to the property itself, encumbering the title and making it difficult for the owner to sell or refinance until the lien is resolved. The mechanic’s lien is one of the oldest remedies in American law, rooted in the principle that those who improve real property should have a security interest in that property.

Key characteristics of a California mechanic’s lien:

• It is a claim against the property, not against the project funds
• It is recorded with the County Recorder’s office in the county where the property is located
• It encumbers the property title, affecting the owner’s ability to sell or refinance
• It must be enforced by filing a lawsuit within 90 days of recording
• The lien is limited to the owner’s equity in the property

What Is a Stop Payment Notice in California?

A stop payment notice is a claim against construction funds. Rather than targeting the property, it directs the property owner or construction lender to withhold funds that are owed to the direct (general) contractor so that the claimant can be paid. It does not attach to or encumber the real property.

Key characteristics of a California stop payment notice:

• It targets construction funds held by the owner or construction lender
• It is served directly on the owner and/or the construction lender—not filed with the county
• It does not encumber the property title
• When served on a construction lender, it may require a bond equal to 125% of the claim amount (a “bonded stop notice”) under Civil Code §8532
• It can be used on both private and public construction projects (mechanic’s liens cannot be used on public projects)

How Do Mechanic’s Liens and Stop Payment Notices Compare?

The following table highlights the key differences between these two remedies:

When Should You Use a Mechanic’s Lien?

A mechanic’s lien is typically the stronger remedy when:

• The project is owner-funded (no construction lender). Without a construction lender, there are no undisbursed loan funds for a stop payment notice to reach. The mechanic’s lien targets the property directly.
• The owner has significant equity in the property. The more equity the owner has, the more effective the lien becomes as leverage for settlement.
• You want maximum settlement leverage. A mechanic’s lien clouds the title, which creates urgency for the owner. Most owners will negotiate to clear a lien rather than risk complications with a sale or refinance.
• You have completed your work. A mechanic’s lien cannot be recorded while the lien claimant is still providing work on the project.

When Should You Use a Stop Payment Notice?

A stop payment notice is often the better tool when:

• The project has a construction lender. When a lender holds undisbursed construction loan funds, a bonded stop payment notice obligates the lender to withhold those funds, providing direct access to the money.
• You are a subcontractor and the general contractor is not paying you. A stop payment notice reaches “up the chain” to the owner or lender, bypassing the nonpaying general contractor.
• The property may lack sufficient equity. If the property is heavily leveraged, a mechanic’s lien may not yield meaningful recovery. Undisbursed loan funds may be a better target.
• Work is still ongoing. Unlike a mechanic’s lien, serving a stop payment notice does not require the claimant to cease work. You can secure your claim while continuing to perform under the contract.
• The project is a public work. Mechanic’s liens cannot be placed on public property. A stop payment notice is the primary statutory remedy for public projects.

Can You Use Both a Mechanic’s Lien and a Stop Payment Notice?

Yes—and in many cases, you should. These remedies are not mutually exclusive. Using both maximizes your leverage and protects against the risk that one remedy alone proves insufficient. For example, if you record a mechanic’s lien but the property turns out to have little equity, a stop payment notice may capture undisbursed loan funds. Conversely, if you serve a stop payment notice but the lender has already disbursed all funds, a mechanic’s lien ensures you still have a claim against the property.

Do You Need a Preliminary Notice for Both Remedies?

In most cases, yes. California law requires subcontractors, material suppliers, and others who do not have a direct contract with the property owner to serve a 20-day preliminary notice as a prerequisite to both mechanic’s lien and stop payment notice rights (Civil Code §8200). The preliminary notice must be served within 20 days of first furnishing labor or materials to the project. Failure to serve a timely preliminary notice can jeopardize both remedies.

Even direct contractors should serve a preliminary notice on the construction lender (if one exists) to preserve mechanic’s lien rights.

What Are the Key Deadlines for Each Remedy?

What Is a Bonded Stop Notice?

When a construction lender is involved, the lender is only obligated to withhold funds if the stop payment notice is accompanied by a surety bond equal to 125% of the claim amount (Civil Code §8532). This is known as a “bonded stop notice.” The bond protects the owner, lender, and direct contractor from damages if the stop payment notice turns out to be improper.

An unbonded stop payment notice served on a construction lender is permissible, but the lender may choose not to withhold funds. An unbonded stop notice served on the property owner (as opposed to the lender) is still effective—the owner is obligated to withhold funds under Civil Code §8522(a), unless a payment bond was previously recorded.

How Do You Decide Which Remedy to Use? A Practical Framework

When facing a payment dispute on a California construction project, consider these questions:

1. Is there a construction lender? If yes, a bonded stop payment notice should be a priority—it reaches the loan funds directly.
2. Does the property have equity? If yes, a mechanic’s lien provides strong leverage against the owner.
3. Are you still working on the project? If yes, a stop payment notice lets you secure your claim without halting work. A mechanic’s lien requires that you have ceased furnishing labor or materials.
4. Is this a public project? If yes, a mechanic’s lien is unavailable. Use a stop payment notice and consider a payment bond claim.
5. When in doubt, use both. Filing both a mechanic’s lien and a stop payment notice provides maximum protection and leaves no gap in your remedies.

Frequently Asked Questions

Q: What is the difference between a stop payment notice and a mechanic’s lien in California?

A: A mechanic’s lien is a claim against the property itself that encumbers the title. A stop payment notice is a claim against construction funds held by the owner or lender. They target different assets and serve different strategic purposes.

Q: Can a subcontractor file both a mechanic’s lien and a stop payment notice?

A: Yes. These remedies are not mutually exclusive, and using both is often recommended to maximize your leverage and protection.

Q: Do I need a bond to file a stop payment notice in California?

A: If you’re serving the stop payment notice on a construction lender, yes—you generally need a surety bond equal to 125% of the claim (Civil Code §8532). If you’re serving it on the property owner alone, no bond is required.

Q: Can I use a stop payment notice on a public construction project?

A: Yes. Stop payment notices can be used on both private and public construction projects in California. Mechanic’s liens, by contrast, cannot be placed on public property.

Disclaimer: This content is for informational purposes only and does not constitute legal advice. Results depend on the specific facts of each situation. No attorney-client relationship is created by reading this article. Contact Bay Legal, PC for advice on your specific situation.