A mechanic's lien is a legal claim against real property filed by someone who provided labor, materials, or services to improve that property and was not paid.

It can be used by contractors, subcontractors, suppliers, and sometimes design professionals after work on a house, barn, shop, or commercial building. If a roofer replaces storm damage, a supplier delivers concrete for a new grain bin pad, or an electrician wires an addition and the bill goes unpaid, a lien may attach to the property itself - not just the person who ordered the work. That can stop a sale, delay refinancing, cloud title, and in some cases lead to foreclosure of the lien if the deadlines are missed or ignored.

In Nebraska, these claims are controlled largely by the Nebraska Construction Lien Act. Timing matters. A claimant generally must record the lien within 120 days after the last furnishing of services or materials, and an action to enforce it usually must be started within 2 years after recording, or the lien can expire. Owners also have notice rights and defenses, so paperwork and dates need immediate attention.

For an injury claim, a mechanic's lien can affect who has a financial stake in a property and whether money from a sale or settlement is tied up. After a construction-site injury, it may also help identify contractors, subcontractors, and other parties connected to the job before records go cold.