Why It Matters
A mechanic's lien gives construction professionals the right to place a legal encumbrance on a property when they go unpaid. It clouds the property's title, blocking any sale or refinance until resolved. Unlike a judgment lien, it attaches to the specific property where work occurred—even if the owner paid the general contractor in full.
At a Glance
- Filed by contractors, subcontractors, laborers, and material suppliers
- Attaches to the property itself, not just the owner's personal assets
- Owner can be liable even after paying the GC in full
- Most states require a "preliminary notice" before filing
- Filing deadlines are strict—typically 60–120 days from last day of work
- Clouds title and blocks sale or refinance until resolved
- Removed by paying the debt, filing a lien release, or posting a surety bond
- Title insurance does not cover liens filed after closing
- Lien waivers from subs and suppliers are the primary investor defense
How It Works
Any party who contributes labor or materials to a renovation can file a mechanic's lien if unpaid. This includes GCs, subcontractors, material suppliers, and in some states, design professionals.
Preliminary notice. Many states require claimants to serve a preliminary notice on the owner within a set number of days of starting work. Missing this deadline forfeits lien rights entirely. California requires most subcontractors to serve a 20-day preliminary notice or lose the right to lien.
Filing deadlines. After the last day of work, the claimant has a fixed window—commonly 60 to 120 days depending on the state—to record the lien with the county recorder. Miss that window and the right to file is lost.
Foreclosure risk. If left unresolved, the claimant can sue to foreclose, forcing a court-ordered sale to satisfy the debt. Most states give lien holders one to two years to pursue foreclosure before the lien expires.
Removal options:
- Pay the debt and obtain a recorded lien release
- Bond around it — substitute a surety bond, freeing the title while the dispute continues
- Dispute the lien's validity in court if there are grounds
- Wait for expiration if the claimant fails to foreclose within the statutory period
Real-World Example
Lisa bought a distressed duplex and hired a GC to handle a full gut renovation. She paid every draw on schedule. What she didn't know: her GC had stopped paying the framing subcontractor midway through the project.
Three weeks after the job wrapped and Lisa accepted a sale offer, her title company flagged a mechanic's lien for $18,400—filed by the framing sub. Closing couldn't proceed.
Her GC went silent. Lisa's attorney advised bonding around the lien to keep the sale alive: $1,200 in fees plus posting the full $18,400 with the bonding company while the dispute resolved.
Her title insurance covered pre-closing defects only—not liens filed after. Going forward, Lisa required signed lien waivers from every subcontractor and supplier at each draw before releasing payment to the GC.
Pros & Cons
- Secured claim — attaches to real property, which can't be hidden or easily transferred
- Leverage — a clouded title creates immediate pressure on the owner to pay
- No lawsuit required to file — recorded directly with the county recorder
- Low cost — recording fees are nominal compared to amounts at stake
- Clouds title immediately — halts any sale or refinance
- Owner liability for GC's debts — paying the GC does not extinguish sub lien rights
- Costly to remove — attorney fees, bonding costs, and settlement add up fast
- Multiple claimants possible — a large renovation can generate liens from dozens of parties
Watch Out
"I paid the GC" is not a defense. Payment to the general contractor does not extinguish lien rights held by unpaid subcontractors or suppliers. This is the most expensive lesson investors learn.
Tight filing windows. A sub who finished work 90 days ago may still have time to file. Don't assume liens can't appear after a project closes out.
Title search timing. A search done two weeks before closing may miss a lien filed in the final days. Request a bring-down search as close to closing as possible.
Lien waiver gaps. A GC-only lien waiver does not release claims from downstream subs and suppliers. Collect conditional waivers from every party at each draw, and unconditional waivers at final payment.
Ask an Investor
The Takeaway
A mechanic's lien can attach to your property whenever anyone in the construction chain goes unpaid—regardless of whether you caused the dispute. The investor's defense is proactive: signed lien waivers at every draw, title insurance at closing, and a general contractor agreement requiring the GC to deliver sub releases before final payment. Prevention costs almost nothing. Removal can cost tens of thousands.