A mechanics lien is a legal claim that a contractor, subcontractor, or material supplier can file against a property when they've provided labor or materials for a job and haven't been paid. It's a tool the construction industry uses to secure payment, and it can seriously complicate a sale or refinance if it isn't resolved.
How a Mechanics Lien Actually Works
When work is performed or materials are supplied for a construction or renovation project and the party that did the work doesn't get paid, they generally have the right to file a lien against the specific property where the work occurred. Once recorded with the county, the lien attaches to the property itself — not just to whoever hired the contractor — which means it can follow the property even through a sale if it isn't cleared first. Because the lien is against the property, it can cloud title, making it difficult or impossible to sell or refinance until it's resolved (paid, negotiated, or otherwise released).
Who Can File One
Generally, general contractors, subcontractors, laborers, and material suppliers who directly contributed labor or materials to a specific project can file a mechanics lien if they aren't paid. The specific list of who qualifies, the required notice steps beforehand, filing deadlines, and the exact process all vary significantly by state, so this is genuinely a "check your local law" situation rather than a universal rulebook.
Why This Matters Especially on a Flip
Flippers hire multiple subcontractors on tight timelines, and it's common for a general contractor to be paid in full by the flipper while failing to pass payment through to their own subcontractors. In many states, a subcontractor who wasn't paid by the general contractor can still file a lien against the property — even though the property owner already paid the general contractor for that work. This is one of the more painful surprises in flipping: paying once doesn't automatically protect you from paying again if the money didn't make it downstream.
How to Protect Yourself as a Property Owner
- Use lien waivers. When you make a payment to a contractor, request a lien waiver (sometimes called a lien release) confirming that payment was received and waiving lien rights for that amount. Conditional waivers upon receipt of a check and unconditional waivers once it's cleared are common practices — ask your attorney which to use.
- Verify subcontractors are actually being paid, not just trusting the general contractor's word, especially on larger draws.
- Consider joint checks made out to both the general contractor and a major subcontractor or supplier on larger line items, so payment can't be diverted.
- Check for preliminary notices. Many states require subcontractors and suppliers to send an early notice preserving their lien rights — tracking these notices gives you visibility into who's actually working on the project and who could later file a lien.
- Get title insurance on both purchase and sale, which can offer some protection against certain lien-related title issues, subject to policy terms.
What to Do If a Lien Is Filed Against Your Property
- Don't ignore it — liens generally have to be addressed before you can close a sale or refinance, and the longer it sits, the more it can complicate a transaction.
- Verify the lien is legitimate and was filed within the required deadlines and notice requirements for your state; procedural errors can sometimes invalidate a lien.
- Negotiate directly with the lienholder if the underlying debt is legitimate, or dispute it through the proper legal process if you believe it isn't.
- Involve a real estate attorney, especially if the lien is disputed or if it's holding up a closing with a deadline.
Frequently Asked Questions
Can a subcontractor lien my property even if I already paid the general contractor?
In many states, yes — this is one of the most important things for a flipper to understand. Lien waivers and verified payment to subs are the main tools to prevent it.
How long does a contractor have to file a mechanics lien?
Deadlines vary significantly by state, often tied to when work was last performed or materials last delivered. Check your specific state's statute rather than assuming a timeframe.
Does a mechanics lien mean I have to sell the property to satisfy it?
Not necessarily — many liens are resolved through direct payment or negotiation. But an unresolved lien can block a sale or refinance until it's cleared or released.