A mechanic's lien is a legal claim a contractor, subcontractor, or supplier can place on your property when you don't pay them for work or materials
Unlike a mortgage or tax lien, a mechanic's lien doesn't require a court judgment first. The contractor files a document — usually called a "Notice of Lien" or "Claim of Lien" — with your county recorder's office, and that filing itself creates the lien. It attaches to your property and clouds your title, meaning you cannot sell, refinance, or transfer the property without settling the debt or going to court to remove it.
The lien covers unpaid labor, materials, equipment rental, or design services related to construction or repair work on the property. It applies whether the contractor worked directly for you or was hired by your general contractor. The amount of the lien is typically the unpaid contract price, sometimes plus interest and filing fees, depending on your state's law.
Mechanic's liens exist in all 50 states but vary significantly in how they work, how long they last, and what notice requirements explore. The lien period — how long the contractor has to file after the last work date — ranges from 30 days in some states to 120 days or longer in others. Once filed, the lien typically remains valid for one to three years, though some states allow renewal.
Key Takeaways
- A mechanic's lien is filed with your county recorder without a court order and creates a legal claim against your property for unpaid construction work or materials.
- The lien applies to work done by contractors you hired directly or by subcontractors hired by your general contractor, even if you never contracted with them.
- Filing important date and lien duration vary by state — typically contractors have 30 to 120 days after their last work to file, and the lien lasts one to three years.
- A mechanic's lien prevents you from selling or refinancing your property until the debt is paid, resolved in court, or formally removed through a bond or release.
- Homeowners can reduce lien risk by requiring lien waivers from contractors before final payment and by verifying that all subcontractors and suppliers have been paid.
How a mechanic's lien is filed and recorded
The contractor or their attorney prepares a written claim that includes the property address, the owner's name, a description of the work performed, the amount owed, and the dates work began and ended. This document is filed with the county recorder's office in the county where the property is located. Filing fees vary but typically range from $20 to $100 depending on the county and document length.
Once recorded, the lien becomes part of the public record and shows up on a title search. You will receive notice of the lien either before or after filing, depending on your state's rules. Some states require the contractor to serve you with a copy of the lien notice within a set number of days after filing; others do not require notice at all, meaning you may discover the lien only when you try to sell or refinance.
The lien does not require your signature or consent. It is a unilateral legal action taken by the contractor to find payment. However, the contractor must follow strict procedural rules — missing a important date or omitting required information can make the lien invalid, which is why some property owners challenge liens in court.
Who can file a mechanic's lien against your property
General contractors, subcontractors, laborers, material suppliers, and equipment rental companies can all file mechanic's liens. You do not have to have a direct contract with the person filing. If your general contractor hired a plumber, electrician, or lumber supplier, any of them can file a lien if the general contractor does not pay them — even though you already paid the general contractor.
This is why homeowners are often surprised by liens filed by people they never hired. A general contractor may go unpaid and fail to pay their subs, leaving you responsible for settling those claims before you can sell your home. Some states allow laborers (workers paid by the day or hour) to file liens; others do not.
The lien amount is limited to what the contractor or supplier is actually owed for work on your property. They cannot lien you for work on someone else's property or for unrelated debts. However, they can include reasonable costs for filing the lien, interest accrued, and sometimes attorney fees, depending on state law.
important date for filing and how long a lien lasts
The window to file a mechanic's lien is measured from the last date work was performed or materials were delivered to the property. In most states, this important date is 30 to 90 days after that final date. Some states allow up to 120 days or longer. If the contractor misses this important date, the right to file a lien is lost permanently — though they may still pursue payment through a lawsuit.
Once filed, the lien remains valid for a set period, typically one to three years depending on the state. During that time, the contractor can force a sale of your property through a court process called foreclosure to recover the debt. After the lien period expires, it can usually be removed from the record, though the underlying debt may still be collectible through other means.
Some states allow contractors to renew a lien before it expires, extending the period another year or more. Others require the contractor to file a lawsuit within the lien period to keep the claim alive. Understanding your state's specific rules is important because missing a renewal important date can eliminate the lien even if you still owe the money.
How a mechanic's lien affects your ability to sell or refinance
A mechanic's lien clouds your title, meaning title insurance companies will not insure your property and lenders will not refinance it while the lien is in place. If you try to sell, the title company will require the lien to be paid off at closing from the sale proceeds before the deed transfers to the buyer. If the sale price is not enough to cover the lien and your mortgage, the sale cannot close.
This gives the contractor significant leverage. Even if you dispute owing the money, you cannot straightforward ignore the lien and move forward with your plans. You must either pay the debt, negotiate a settlement, post a bond to replace the lien, or go to court to remove it.
Refinancing is similarly blocked. Lenders require a clear title and will not lend against a property with an active mechanic's lien. This can trap you in your current loan even if better rates become available.
Protecting yourself from mechanic's liens
The most effective protection is to require lien waivers from your contractor and all subcontractors before you make final payment. A lien waiver is a signed document in which the contractor agrees they have been paid in full and waive their right to file a lien. Most states have statutory lien waiver forms that are recognized by courts.
Require conditional waivers (waivers that are valid only if the check clears) before each progress payment, and final waivers before you pay the last invoice. Ask your contractor to provide waivers from all subs and suppliers as a condition of receiving their final payment. Do not accept a general statement that everyone has been paid — get signed documents.
You can also require your contractor to post a payment bond before work begins. This is an insurance policy that guarantees payment to subs and suppliers if the contractor fails to pay them. The bond protects you from liens filed by people you never hired. Bond costs are typically 1 to 3 percent of the contract price and are usually paid by the contractor.
Keep detailed records of all payments, invoices, and contracts. If a lien is filed, you will need documentation to prove you already paid or to challenge the lien's validity in court. Verify that your contractor is licensed and insured, and check whether they have a history of lien disputes.
Removing or challenging a mechanic's lien
If a lien has been filed against your property, you have several options. The simplest is to pay the amount claimed, which will cause the contractor to file a release of lien removing it from the record. If you dispute the amount or believe the lien is invalid, you can file a lawsuit to remove it.
You can also post a bond with the court in the amount of the lien plus costs. This replaces the lien on your property with a bond, clearing your title so you can sell or refinance. The contractor's claim then attaches to the bond instead of your property. This is useful if you need to move quickly but plan to resolve the dispute later.
To challenge a lien in court, you typically must file a motion or lawsuit within a set timeframe — often 30 to 90 days after the lien is filed, depending on your state. Common grounds for removal include: the contractor was not properly licensed, the work was not performed as claimed, you already paid the debt, or the contractor missed the filing important date. An attorney familiar with your state's lien law can evaluate whether you have a valid defense.
Frequently Asked Questions
Can a contractor file a lien if I already paid them?
Yes, but you can remove it by proving payment. Keep copies of canceled checks, bank transfers, credit card statements, or receipts showing the date and amount paid. If you have a signed release of lien from the contractor, that is the strongest proof. If the contractor refuses to release the lien after you have paid, you can file a lawsuit to remove it and may recover attorney fees.
What if a subcontractor files a lien but I paid my general contractor?
You may still owe the subcontractor if your general contractor did not pay them. The lien is valid even though you have no direct contract with the sub. You can require your general contractor to remove the lien or post a bond, or you can pay the sub directly and then pursue the general contractor for reimbursement. Some states allow you to withhold final payment to the general contractor until all subs provide lien waivers.
How long does a mechanic's lien stay on my property?
Typically one to three years from the filing date, depending on your state. After that period expires, the lien can be removed from the record. However, the contractor may still pursue the debt through a regular lawsuit, which has a longer statute of limitations. Some states allow contractors to renew a lien before it expires, extending the period further.
Can I sell my house if there is a mechanic's lien on it?
Not without resolving the lien first. The title company will not insure the sale and the buyer's lender will not finance it. At closing, the lien must be paid from the sale proceeds, or you must post a bond to replace it. If the sale price is too low to cover the lien, the sale cannot close unless the contractor agrees to accept less or release the lien.
What is the difference between a mechanic's lien and a mortgage?
A mortgage is a voluntary lien you agree to when you borrow money to buy or improve a property. A mechanic's lien is an involuntary lien filed by a contractor without your consent when you do not pay for work. Both cloud your title and must be satisfied before you can sell, but a mortgage is recorded first and has priority in a foreclosure sale.