What is a mechanics lien in construction?
Last reviewed July 5, 2026
A mechanics lien is a legal claim against a property for unpaid work or materials related to construction. It ensures that contractors, subcontractors, and suppliers can secure payment. If unpaid, they can enforce the lien through court to recover owed funds.
Key points
- Legal claim for unpaid work or materials.
- Protects contractors and subs.
- Enforced through court if necessary.
Mechanics liens vary by state, including deadlines for filing and notice requirements. It's essential to follow your state's specific lien statutes to avoid losing the right to file. Keep track of deadlines and document all communications with the owner and subs to support your claim.
How Alloovium helps
Alloovium can help track lien deadlines and manage related documentation efficiently.
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General information for US construction professionals — not legal advice. Lien deadlines, retainage caps and notice rules vary by state; verify with the state statute or a construction attorney.