Mechanics Lien
A legal claim filed against a property by a contractor, subcontractor, or supplier who has not been paid for work or materials provided to the project. Mechanics liens encumber the property title and can force payment during a sale or refinance.
A mechanics lien is a legal claim filed against a property by a contractor, subcontractor, or supplier who has not been paid for work or materials provided to the property. It is the primary leverage available to unpaid parties in construction disputes.
How Liens Work
When an unpaid contractor files a mechanics lien, the lien attaches to the property title. The owner cannot sell or refinance the property without either paying the lien, getting it released, or bonding around it. The lien effectively forces the owner to address the payment issue before the property can be transacted. This leverage is why mechanics lien rights exist — to protect parties who contribute value to a property but might otherwise have limited recourse to collect.
Strict Procedural Requirements
Mechanics lien law is highly procedural and varies significantly by state. Preliminary notices must be filed early in the project, often within 20 to 60 days of first providing labor or materials. The lien itself must be filed within a specific deadline after completion or non-payment. Lawsuits to enforce the lien must be filed within another deadline. Missing any step often voids the lien. Because the procedure is so strict, most lien work is handled by attorneys or dedicated lien-filing services.
Prevention Through Lien Waivers
Owners and GCs prevent lien problems by collecting lien waivers throughout the project. Each payment generates waivers from the paid parties, documenting that they have no lien claim for work covered by that payment. By final payment and final waivers, the owner has a complete paper record that every party in the payment chain has been paid and has waived lien rights. Properly documented, this prevents most lien disputes before they start.
Frequently asked questions
Each state has specific requirements including: a preliminary notice filed early in the project, a specific deadline for filing the lien claim itself after work is completed or payment becomes overdue, and required content in the lien documents. Missing any step typically voids the lien, so most serious claims go through an attorney or lien specialist.
Varies by state. Many states require the lien claimant to file a lawsuit to enforce the lien within a specified period (often 90 days to a year) or the lien expires. Until enforced or released, the lien remains on the property title and complicates sale or refinance.
By paying the underlying debt and obtaining a release from the claimant, by demonstrating the lien was improperly filed and obtaining a court order releasing it, or by bonding around the lien — posting a bond that substitutes for the lien on the title and allows the property to be sold or refinanced while the dispute continues.
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