What a California mechanics lien is and how it attaches to your property

A mechanics lien in California is a legal claim filed against your property when someone who worked on it or supplied materials was not paid. Unlike a mortgage or tax lien, a mechanics lien does not require a court judgment first — the person filing it can place it on your property record straightforward by following state filing procedures. The lien sits on your title and prevents you from selling, refinancing, or transferring the property until the debt is resolved.

The lien applies to the property itself, not to you personally. This means even if you paid a contractor who then failed to pay their workers or suppliers, those workers and suppliers can still file a lien against your home. California law protects these parties because they provided real value to your property but have no contract with you directly.

A mechanics lien is different from other liens because it has a strict timeline. In California, the lien expires after a set period unless the person who filed it takes additional legal steps. Understanding this timeline is critical because it affects when you can clear your title.

Key Takeaways

  • A mechanics lien is filed against your property when a worker or supplier was not paid for work or materials, and it blocks you from selling or refinancing until resolved.
  • In California, a mechanics lien expires after 90 days unless the filer records a lawsuit in court, which extends the lien to the length of the court case.
  • You must receive a preliminary notice before work begins or within 20 days of the first work day for most construction projects, or the lien filer loses certain protections.
  • To remove a lien, you can pay the debt, post a bond, or wait for the lien to expire if the filer does not file a lawsuit within 90 days.
  • Liens filed by workers and suppliers have priority over your mortgage in some situations, meaning they get paid before your lender if the property is sold.

Who can file a mechanics lien in California

California law allows several categories of people to file a mechanics lien: general contractors, subcontractors, workers, material suppliers, and equipment rental companies. Each has the same right to file if they were not paid for work or materials provided to your property.

The person filing does not need to have a contract with you. A subcontractor hired by your general contractor can file a lien against your home even though you never hired them directly. A supplier who delivered materials to a job site can file a lien even if they only dealt with the contractor. This is why you can end up with a lien on your property for a debt you did not create.

The one exception is a laborer — someone hired by the day to perform work. Laborers have more limited lien rights and typically must file within a shorter timeframe than contractors or suppliers.

The preliminary notice requirement and what it means for you

Before most construction work begins in California, the contractor or their workers must give you a preliminary notice. This notice informs you who is working on your property and warns you that they can file a lien if they are not paid. You must receive this notice before work starts or within 20 days of the first work day.

The preliminary notice serves as your protection. If you do not receive one, the person filing the lien loses the right to file it against your property — though they can still sue the contractor who hired them. This makes the preliminary notice one of your strongest defenses against unexpected liens.

If you are having work done, ask your contractor for preliminary notices from all subcontractors and suppliers. Keep these notices in a file. If a lien is later filed and you can show you never received a preliminary notice from that filer, you have grounds to challenge the lien.

The timeline for filing and enforcing a mechanics lien in California

The timeline for a mechanics lien in California is strict and works in stages. First, the person who performed the work or supplied materials has 30 days from the last day they worked or delivered materials to file the lien with the county recorder. This is the filing important date — if they miss it, they lose the lien right entirely.

Once filed, the lien is valid for 90 days. During this 90-day window, the filer must record a lawsuit in court if they want to keep the lien alive. If no lawsuit is recorded within 90 days, the lien expires automatically and is removed from your title.

If a lawsuit is recorded, the lien remains in effect for the length of the court case. This can extend the lien for months or years depending on how long the case takes. Once the case is resolved, the lien is either enforced (you must pay or the property can be sold to satisfy the debt) or released (the lien is removed).

How to remove or challenge a mechanics lien

You have several options if a mechanics lien is filed against your property. The simplest is to pay the debt — once you pay the amount claimed in the lien plus any costs, the filer must release the lien within 15 days. Get a written release from the filer before you pay, and record it with the county recorder to clear your title.

If you dispute the lien, you can file a motion to remove it. This requires showing that the filer did not meet California's requirements — for example, they did not file within 30 days, you did not receive a preliminary notice, or the work was not actually performed on your property. You will likely need an attorney for this step.

Another option is to post a bond. A bond is a may provide from an insurance company that they will pay the lien amount if the filer wins in court. Once you post a bond, the lien is removed from your property title, and you can sell or refinance. The bond protects the filer while freeing your title. Bonds typically cost 10 to 15 percent of the lien amount.

If the filer does not record a lawsuit within 90 days, the lien expires automatically. You do not have to do anything — it straightforward falls off your title. However, do not assume this will happen. Confirm with the county recorder that the lien has been released before you attempt to sell or refinance.

Mechanics liens versus other claims on your property

A mechanics lien has different priority rules than other liens. In California, a mechanics lien filed by a worker or supplier can take priority over your mortgage in certain situations. Specifically, if the lien is filed before your mortgage is recorded, or if the work was done to improve the property (rather than just maintain it), the mechanics lien may be paid before your mortgage lender if the property is sold.

This priority rule is one reason lenders require preliminary notices and lien waivers before they will fund a construction loan. They want to know who has worked on the property and confirm those parties have waived their lien rights.

A tax lien or judgment lien works differently — those are claims by government agencies or courts, not by workers or suppliers. A mechanics lien also differs from a homeowners association lien, which is filed by an HOA for unpaid dues or assessments.

Lien waivers and how they protect you

A lien waiver is a document in which a worker, supplier, or contractor agrees they will not file a mechanics lien in exchange for payment. There are two types: conditional waivers (the waiver is void if the check bounces) and unconditional waivers (the waiver stands even if payment fails).

Before you pay any contractor, subcontractor, or supplier, ask them to sign a lien waiver. This is your proof that they have been paid and cannot later file a lien. Keep these waivers in your records. If you are paying from a construction loan, your lender will require lien waivers before they release funds.

Lien waivers are especially important if you are paying a general contractor who then pays subcontractors and suppliers. The general contractor's lien waiver does not prevent a subcontractor from filing a lien if the general contractor does not pay them. You need waivers from everyone who worked on the property.

What to do if you discover a mechanics lien on your property

If you discover a lien on your title, your first step is to get a copy of the lien document from the county recorder. This document shows who filed it, what amount they claim, what work or materials they say they provided, and the date it was filed. Review it carefully to see if you recognize the work or supplier.

Contact the person or company that filed the lien and ask for an explanation. Sometimes liens are filed in error — the wrong property address, work that was already paid for, or a dispute between the contractor and subcontractor that has nothing to do with you. If it is an error, ask them to file a release when ready.

If the lien is valid but you believe the amount is wrong, or if you have already paid, gather your documentation — cancelled checks, receipts, lien waivers, contracts. Consider consulting an attorney who handles construction disputes. The cost of an attorney consultation is often less than the cost of a bond or the delay caused by an unresolved lien.

Frequently Asked Questions

Can a mechanics lien be filed after the work is finished?

Yes, but only within 30 days of the last day work was performed or materials were delivered. If more than 30 days have passed, the filer has lost the right to file a lien. This is why it is important to keep records of when work ended.

What happens if I sell my house with a mechanics lien on it?

You cannot sell the property without resolving the lien first. The title company will not issue a policy, and the buyer's lender will not fund the purchase. You must pay the lien, post a bond, or obtain a release from the filer before closing.

Does a mechanics lien affect my credit score?

A mechanics lien is a property claim, not a debt collection account, so it does not directly appear on your credit report. However, if the lien leads to a lawsuit and judgment against you, that judgment can affect your credit and your ability to borrow.

Can I remove a mechanics lien myself without an attorney?

You can pay the debt, post a bond, or wait for the 90-day period to expire without an attorney. If you want to challenge the lien in court, you will need legal representation. An attorney can review the lien and advise whether you have grounds to remove it.

What if the contractor who hired the subcontractor already paid them?

That is a dispute between the contractor and subcontractor, not your problem — unless you have not paid the contractor. If you have paid the contractor in full, get a lien waiver from the subcontractor stating they have been paid. If the subcontractor files a lien anyway, you can challenge it by showing the waiver.