Mechanic's Lien Definition

A legal claim placed on real estate by someone who is owed money for labor, services, or supplies contributed to the property for the purpose of improving it. Typical lien claimants are general contractors, subcontractors, and suppliers of building materials. A mechanics' lien claimant can sue to have the real estate sold at auction and recover the debt from the proceeds. Because property with a lien on it cannot be easily sold until the lien is satisfied (paid off), owners have a great incentive to pay their bills.