A mechanic's lien is a legal claim a contractor, subcontractor, or supplier can place on your property if you don't pay them for work or materials

When a contractor builds a deck, a plumber installs pipes, or a lumber supplier delivers materials for your renovation, they are adding value to your property. If you don't pay them, they have a way to recover that money: they can file a mechanic's lien against your home or other real property. This lien gives them a legal claim to your property, which means you cannot sell it, refinance it, or transfer ownership without settling the debt first.

The lien does not mean they own your house or can force you out. It means they have a documented right to payment that is tied to your property itself. If you sell, the proceeds go to paying off the lien before you see any money. If you ignore it long enough, the contractor can eventually force a sale of the property to recover what you owe.

Mechanic's liens exist because construction work and materials are straightforward to hide or dispute after the fact. Unlike a car loan, where the lender holds the title until you pay, construction work becomes part of the building itself and cannot be repossessed. The lien law protects workers and suppliers by giving them a claim on the thing they improved.

Key Takeaways

  • A mechanic's lien is a legal claim filed against your property by someone you hired or who supplied materials, and it prevents you from selling or refinancing until the debt is paid.
  • Contractors, subcontractors, laborers, and material suppliers can all file mechanic's liens, depending on state law and whether they were properly hired or contracted.
  • Most states require the person filing the lien to send you a notice before they file, and to file within a specific window—often 30 to 120 days after the last work or delivery.
  • You can dispute a lien by paying it, negotiating a settlement, filing a bond to remove it from the property record, or challenging it in court if it was filed incorrectly.
  • The best prevention is to pay invoices on time, get lien waivers from everyone who works on your project, and verify that your contractor has paid their subcontractors and suppliers.

Who can file a mechanic's lien against your property

State law determines exactly who has the right to file. In most states, the following groups can file a mechanic's lien: the general contractor you hired directly, any subcontractor they bring on (the electrician, the framing crew, the HVAC installer), laborers who worked on the job, and material suppliers who delivered lumber, concrete, fixtures, or other goods to your property.

The key word is "furnished"—meaning they provided labor or materials that became part of your property. A supplier who delivers materials to the job site can file a lien even if they were never hired by you directly, as long as they were hired by someone working on your property and the materials went into the work. This is why a homeowner can end up with a lien from a company they have never heard of.

Some states also allow equipment rental companies to file liens if they rented machinery for the project. A few states restrict liens to people who were hired directly by the property owner, but most allow anyone in the construction chain to file, which is why it is important to track who is working on your property and whether they have been paid.

The timeline for filing a mechanic's lien

A mechanic's lien cannot be filed forever. Each state sets a important date, called the notice of lien important date, which usually runs from the last day work was performed or materials were delivered. In most states, this window is 30 to 120 days, though a few allow up to 180 days. If the contractor does not file within that window, the right to file a lien expires.

Before filing, most states require the contractor or supplier to send you a preliminary notice or notice of non-payment. This notice warns you that they have a right to file a lien if they are not paid. The timing and content of this notice vary by state—some require it before work starts, others allow it anytime during the project. Receiving this notice does not mean a lien has been filed; it means one could be filed if payment does not arrive.

Once a lien is filed, it is recorded in the public property records at your county recorder's office or courthouse. From that point forward, anyone searching your property title will see the lien. It remains on the record until you pay it off, the contractor releases it in writing, or a court orders it removed.

How a mechanic's lien affects your ability to sell or refinance

A mechanic's lien creates a cloud on your title, meaning your ownership is not clear. Most lenders will not refinance a property with an active lien, and most buyers will not purchase one. If you try to sell, the title company will discover the lien during the title search, and the sale cannot close until the lien is paid or released.

If you have already sold the property, the lien follows the sale proceeds. The title company or closing attorney holds back enough money from the sale to pay off the lien before giving you the rest. If the sale price is too low to cover the lien and your mortgage, you may owe money out of pocket to close the sale.

In extreme cases, if a lien goes unpaid for long enough, the contractor can file a lawsuit to foreclose on the lien, which means forcing a public sale of your property to recover the debt. This is rare but possible, and it is why ignoring a mechanic's lien is dangerous.

How to prevent a mechanic's lien from being filed

The strongest protection is to pay your contractor and all subcontractors and suppliers on time. Before making final payment, ask for a lien waiver—a signed document in which the contractor confirms they have been paid in full and waive their right to file a lien. Most contractors expect this and will provide it without argument.

If you are paying a general contractor who hired subcontractors, ask the general contractor for lien waivers from each subcontractor and supplier before you pay them. This protects you from a situation where you paid the general contractor, but they did not pay their subs, and now the subs file liens against your property.

Some homeowners also request a payment and performance bond from the contractor before work begins. This bond guarantees that the contractor will pay their workers and suppliers. If they do not, the bonding company pays instead, and you are protected. Bonds cost money and are more common on large commercial projects, but they are an option for high-value residential work.

What to do if a mechanic's lien has been filed against your property

If you discover a lien on your property record, your first step is to verify it is legitimate. Check the lien document itself—it should state who filed it, how much they claim you owe, and what work or materials it covers. If the amount or description seems wrong, you may have grounds to challenge it.

If the lien is correct and you owe the money, you have several options. You can pay the contractor directly and ask them to file a release of lien, which removes it from the record. You can negotiate a settlement for less than the full amount. You can post a lien bond, which is an insurance policy that guarantees payment; once the bond is in place, the lien can be removed from the property record while you work out payment terms.

If you believe the lien was filed incorrectly—for example, the important date has passed, or the person who filed it was never hired by you or anyone on your project—you can file a motion to remove the lien in court. This requires proving the lien does not meet the legal requirements, and you may need an attorney. Do not ignore a lien hoping it will go away; the longer it sits, the more leverage the contractor has.

The difference between a mechanic's lien and other types of liens

A mechanic's lien is specific to construction work and materials. It is different from a mortgage lien, which your lender holds as security for the loan used to buy the property. It is also different from a tax lien, which the government files if you owe back taxes, or a judgment lien, which a creditor files after winning a lawsuit against you.

The key difference is that a mechanic's lien is tied to work or materials that improved your specific property. A tax lien or judgment lien can be filed by anyone you owe money to, regardless of whether the debt is related to the property. A mechanic's lien can only be filed by someone who worked on or supplied materials to that property.

In terms of priority, mechanic's liens often rank high on the property. In many states, a mechanic's lien filed during construction has priority over a mortgage taken out after the work began, even if the mortgage was recorded first. This is because the law assumes the lender knew construction was happening and should have checked for liens. This priority can make mechanic's liens especially serious for lenders and title companies.

Frequently Asked Questions

Can a contractor file a lien if I paid them but they didn't pay their subcontractors?

No, not the general contractor. But the subcontractors can file liens against your property if they were not paid, even if you paid the general contractor in full. This is why you should always ask for lien waivers from subcontractors and suppliers before making final payment to the general contractor.

What happens if I pay a lien after it's been filed?

Once you pay, ask the contractor to file a release of lien or satisfaction of lien with the county recorder. This removes the lien from the public record. Without this release, the lien stays on your title even though you have paid, which can still block a sale or refinance.

Can a lien be filed for work I didn't authorize?

Yes, in most states. If a general contractor you hired brings on a subcontractor, that subcontractor can file a lien even though you never hired them directly. This is why you need to track who is working on your property and get lien waivers from everyone involved.

How long does a mechanic's lien stay on my property if I don't pay?

It depends on your state, but most liens remain on the record indefinitely until they are paid, released, or removed by court order. Some states allow the lien to expire after a set period (often 5 to 10 years) if the contractor does not file a lawsuit to foreclose, but you should not count on this.

Can I remove a lien by filing for bankruptcy?

Bankruptcy may delay a lien foreclosure, but it does not erase a mechanic's lien. The lien is tied to your property, not to you personally, so it survives bankruptcy. You would still need to pay it or negotiate its removal.