Glossary
Mechanic's Lien
A mechanic's lien is a statutory lien that allows contractors, subcontractors, and suppliers who improve real property to claim a security interest in that property if they are not paid.
Every state has a mechanic's lien law, sometimes called a construction lien or materialman's lien law. These statutes give people who furnish labor, materials, or services to improve private real property a way to secure payment against the property itself, even if they never had a contract with the owner. A recorded lien clouds the owner's title, which makes it hard to sell or refinance until the claim is resolved, and the lien can ultimately be enforced through a foreclosure lawsuit.
The rules are technical and strictly enforced, and they vary a great deal by state. Most statutes set a deadline to record the lien, often measured from the last date the claimant furnished labor or materials or from completion of the project. Many states also require a preliminary notice early in the job as a condition of lien rights, especially for subcontractors and suppliers who do not contract directly with the owner. After recording, the claimant usually has a limited time to file suit to enforce the lien. Missing any step can wipe out the lien entirely. Public property generally cannot be liened, so claimants on public jobs look to payment bonds instead.
Here is a fictional example. A drywall supplier, Keystone Wallboard, delivers $28,000 of materials to a subcontractor on a private office renovation. Keystone sent the required preliminary notice when it began delivering. When the subcontractor stops paying, Keystone records a mechanic's lien against the property within its state's deadline. The owner, wanting to keep its refinancing on track, arranges payment through the general contractor, and Keystone releases the lien.
Mechanic's liens matter to construction creditors because they turn an unsecured trade debt into a claim against valuable real estate. That leverage often produces payment quickly. Because the deadlines are short and unforgiving, suppliers and subcontractors should track first and last delivery dates on every job and get advice on each state's requirements before the window closes.
Example
Keystone Wallboard sends a preliminary notice, then records a lien for $28,000 of unpaid drywall within the deadline. The owner arranges payment to clear title, and the lien is released.