Mechanics Liens Are the Construction Industry's Most Powerful Payment Remedy
A mechanics lien (also called a construction lien or materialman's lien) is a legal claim against a property that can be filed by contractors, subcontractors, material suppliers, and design professionals who have provided labor or materials for the improvement of that property and have not been paid. Unlike an unsecured debt claim against the contractor or owner personally, a mechanics lien attaches to the property itself - meaning that a property with outstanding mechanics liens cannot be sold or refinanced without resolving those liens. This makes the mechanics lien an extraordinarily powerful collection tool for unpaid construction participants, and it creates significant risk for property owners who pay the general contractor but whose general contractor fails to pay subcontractors and suppliers. Understanding how liens work is tested on the ARE CE exam as part of the construction administration and payment certification content area.
Who Can File a Lien
Lien rights vary by state statute, but generally the following parties can file mechanics liens: the general contractor; subcontractors of any tier (first-tier, second-tier); material suppliers who supply materials incorporated into the project; equipment rental companies in some states; and design professionals (architects, engineers) in many states. The precise requirements - notice deadlines, filing deadlines, required content of the lien - are governed by state statute and vary considerably. In most states, subcontractors must provide a preliminary notice to the owner (or general contractor) within a specified number of days of first furnishing labor or materials to preserve their lien rights.
Lien Waivers
Lien waivers are the primary tool for managing lien risk during a project. A lien waiver is a document signed by a contractor, subcontractor, or supplier that waives (gives up) their mechanics lien rights in exchange for payment received. There are four types of lien waivers: conditional or unconditional, and progress payment or final payment. A conditional progress payment lien waiver waives lien rights through a specified date, conditioned on the check clearing. An unconditional progress payment lien waiver waives lien rights immediately upon signing (risky - do not sign before payment clears). Final payment waivers (conditional and unconditional) similarly apply to the final payment. AIA G702/G703 payment applications are typically accompanied by lien waiver requests from the general contractor for all subcontractors and suppliers.
The Architect's Role
The architect's certification of a progress payment does not guarantee that the contractor has paid or will pay its subcontractors. When the architect certifies payment under AIA A201, the certification means that the work has progressed to the point indicated and that the contractor is entitled to payment - it is not a guarantee of the downstream financial relationships. However, because payment applications routinely include lien waiver representations, and because owners rely on the overall payment certification process as partial protection against lien exposure, the architect should understand how lien waivers work and should advise the owner to require proper lien waivers from the general contractor as a condition of each payment.
Key Exam Points
- Mechanics lien: claim against property by unpaid contractor, subcontractor, supplier, or design professional.
- Lien attaches to property: cannot sell or refinance property with outstanding liens.
- Lien waivers: signed by contractor/subcontractor; waive lien rights in exchange for payment; 4 types.
- Conditional waiver: lien rights waived upon payment clearing; safer for the signing party.
- Architect certification: does not guarantee downstream payment or eliminate owner lien exposure.
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