What is Mechanic's Lien?
Mechanic's lien explained in plain English. Learn what it is, how contractors and freelancers file one, deadlines, and how it protects your right to get paid.
What Is a Mechanic's Lien?
A mechanic's lien (also called a construction lien, contractor's lien, or materialman's lien) is a powerful legal remedy available to contractors, subcontractors, suppliers, architects, engineers, and laborers who have performed work or supplied materials to a property and haven't been fully paid. It creates a legal encumbrance on the property — effectively a security interest — that must be cleared before the property can be sold or refinanced. The mechanic's lien is one of the strongest payment protections available in the construction and service industries. Unlike a simple lawsuit, a lien attaches to the property itself, giving the unpaid party a claim against the property's value. This creates enormous leverage — property owners don't want a lien clouding their title. The term "mechanic's lien" comes from the historical "mechanics" — skilled workers and artisans who built and improved properties. The legal concept dates back centuries and exists in all 50 states, though the specific rules vary dramatically.
Who Can File a Mechanic's Lien?
Typically: - General contractors who contracted directly with the property owner - Subcontractors hired by the general contractor - Suppliers who provided materials to the project - Specialty trades — electricians, plumbers, HVAC, painters, roofers - Laborers who performed work on the property - Design professionals — architects, engineers (in some states) The key requirement: you must have performed work on, or supplied materials to, the specific property — and not been paid for that contribution.
How to File a Mechanic's Lien — Step by Step
Step 1: Send Preliminary Notice (Required in Most States) Many states require a preliminary notice or "notice to owner" to be sent within 10–30 days of first providing work or materials. This puts the property owner on notice that you have a potential lien right. Failing to send this notice may forfeit your lien rights even if you file later. Step 2: Perform the Work and Document Everything Keep detailed records: contracts, change orders, invoices, proof of delivery, photographs of work in progress, and all payment communications. Documentation is critical if you need to enforce the lien later. Step 3: Send a Payment Demand Before filing, send a formal written demand for payment — via certified mail or email with read receipt. Give the property owner a specific deadline (typically 10–15 days). This demonstrates good faith and is often required before filing. Step 4: File the Lien Claim File with the county recorder or land records office in the county where the property is located. The claim must typically include: your name and contact info, the property owner, the general contractor, description of work performed, amount owed, and date of completion. Step 5: Serve the Owner After filing, you must typically serve the property owner with a copy of the filed lien within a specific number of days (varies by state). Step 6: Foreclose if Necessary If the debt remains unpaid, you can file a lawsuit to foreclose on the lien — forcing a sale of the property to satisfy the debt. This step typically requires an attorney.
Example of a Mechanic's Lien in Action
A freelance carpenter is hired to build custom cabinetry for a home renovation. Total contract: $15,000. The homeowner pays the general contractor $50,000 for the full renovation, but the GC fails to pay the carpenter $15,000. The carpenter: 1. Sent preliminary notice at project start ✓ 2. Completed the work and documented it ✓ 3. Sent payment demand to GC (no response) ✓ 4. Filed mechanic's lien against the property within 60 days of completion ✓ 5. Served the homeowner with lien notice ✓ The homeowner now has a lien on their property. To sell or refinance, they must clear the $15,000 lien — which gives them strong incentive to resolve the dispute with the GC or pay the carpenter directly.
Mechanic's Lien vs. Other Liens
| Lien Type | Who Files | Against What | |---|---|---| | Mechanic's Lien | Contractor/subcontractor | Property (real estate) | | Lien (general) | Any creditor | Property or assets | | UCC Lien | Secured lender | Business equipment/inventory | | Tax Lien | IRS/state | All property of taxpayer | | Judgment Lien | Lawsuit winner | Property of judgment debtor |
How It Relates to Invoicing and Business
For contractors and service providers working on properties, mechanic's liens are the nuclear option — use the threat of filing as leverage before you actually file. Most property owners will pay when they understand a lien will cloud their title. The key is: 1. Know your state's notice and filing deadlines before starting work 2. Send preliminary notices on time 3. Document everything 4. Invoice clearly and follow up aggressively Related reading: - Lien: General Overview → - Change Order: Documenting Scope Changes → - Payment Plan: Negotiating with Clients → Key Takeaways: 1. A mechanic's lien is a legal claim on a property for unpaid work performed on it 2. Most states require preliminary notice within 10–30 days of starting work 3. File the lien within your state's statutory deadline (typically 30–120 days after completion) 4. A lien clouds the property's title — forcing payment to clear it 5. Consult a construction attorney in your state for specific deadlines and procedures Protect your right to payment — Try Eonebill Free