You paid your general contractor in full. Months later, a subcontractor you never met files a lien on your house because the GC never paid them. This is legal in most states — and entirely preventable.
Why paying the general contractor isn't enough
A mechanic's lien gives unpaid subcontractors, laborers, and material suppliers the legal right to place a claim against your property — even if you already paid the general contractor in full. Courts have consistently held that a subcontractor's own lien rights cannot be waived by someone else up the chain, meaning a general contractor cannot sign away a subcontractor's right to lien your property. If the GC pockets your payment and doesn't pay their subs, you can legally end up paying for the same work twice.
Preliminary notices: your early warning system
In many states, subcontractors and suppliers must send you a preliminary notice (also called a Notice to Owner or Notice of Furnishing) early in the project. This isn't a threat — it's usually a legal requirement for that subcontractor to preserve their own lien rights later. Requirements vary significantly by state: California requires a 20-day preliminary notice from anyone except the direct contractor, Florida requires a Notice to Owner within 45 days, and some states have no preliminary notice requirement at all. Keep every notice you receive — it's your master list of everyone who needs to get paid on your project.
The four types of lien waivers
- Conditional waiver on progress payment — effective only once the payment actually clears, the safest type for whoever signs it
- Unconditional waiver on progress payment — effective immediately upon signing, regardless of whether the check later bounces
- Conditional waiver on final payment — releases all lien rights once final payment clears
- Unconditional waiver on final payment — the safest waiver for you as the homeowner; only ever accept this once you're certain the payment has actually cleared
How to actually use this system
- Request a preliminary notice list from your general contractor identifying every subcontractor and supplier who will work on the project.
- Build a lien waiver requirement directly into your written contract — each payment is conditioned on receiving conditional lien waivers from everyone paid in that draw.
- Before each payment, collect conditional waivers from the GC and every subcontractor/supplier identified in that payment cycle.
- Once a payment has cleared, exchange the conditional waiver for an unconditional one — this is your permanent proof that lien rights for that specific work have been released.
- Consider a joint check made payable to both the general contractor and a specific subcontractor or supplier for large payments, so funds can't be diverted before reaching the people actually owed.
- If your state allows it, file a Notice of Completion with your county recorder promptly after the work finishes — in California, for example, this shortens the window a contractor has to file a lien from 90 days to 60, and shortens it for subcontractors/suppliers from 90 days to 30.
What this means practically
- Full payment to your general contractor does not automatically protect you from a subcontractor's lien — get waivers from every party in the chain.
- An unconditional waiver should only ever be signed or accepted after the corresponding payment has actually cleared, not just been issued.
- Lien waiver rules vary significantly by state — some states require specific statutory forms (California, Texas, Arizona, and Nevada among them), so check your state's exact requirements before relying on a generic form.
- Filing a Notice of Completion where your state allows it meaningfully shortens the window contractors and subcontractors have to file a lien.
Sources
- CSLB — How to Prevent a Mechanics Lien: cslb.ca.gov
- Consumer Contractor Authority — Mechanics Lien Protection for Homeowners: consumercontractorauthority.com
Related Kibbo Tools
- Home Renovation Project Evidence Pack — track payments and documentation, including lien waivers, throughout your project.
- Home Renovation Contract Checklist — confirm your contract includes a lien waiver requirement before you sign.