The contractor lien process does not start when a client stops paying. It starts the week you begin work on the property.
That distinction matters more than any form or filing fee. Approximately half of all construction companies are not paid in full on a project, and 54% are unable to pay bills on time as a result of late payments. Yet few contractors take advantage of their lien rights, and as many as one third would rather preserve a relationship with a customer who has not paid them over filing a lien. The contractors who do protect themselves are not the ones who scramble after a missed payment. They are the ones who sent the preliminary notice on day one, kept clean records throughout the job, and treated the lien process like project paperwork rather than a nuclear option.
This guide walks through each step of filing a contractor lien, from preliminary notice to enforcement, with state-specific deadlines so you know exactly how much time you have.
What a contractor lien does to a property
A mechanics lien is a legal claim for unpaid construction work that acts as a security interest on the property until payment is delivered. Think of it as collateral. The property itself backs the debt.
Once recorded, the lien clouds the title and makes it extremely difficult to sell or transfer ownership until the lien is lifted. Liens are public record, viewable by anyone looking up property information, which means investors, potential buyers, and business partners all see it. That visibility is the mechanism that makes liens effective. An unpaid invoice sits in someone's inbox. A recorded lien sits on their property title.
This is also why a lien dramatically increases the chances of getting paid if the property owner declares bankruptcy. The property gets sold, and a portion of the proceeds goes toward settling the debt owed to the unpaid contractor.
Why most contractors wait too long
Fear of damaging the relationship is the most common reason contractors never file. A third of them would rather absorb the loss than risk a confrontation. But lien rights are not indefinite. Every state has strict deadlines that determine how long you have to file and enforce a mechanics lien. Missing a deadline can mean losing your legal right to foreclose on a lien, even if you have done the work and have not been paid.
The clock does not start when a client ghosts you. It starts when you first provide labor or materials. Wait until payment is clearly overdue and you may already be outside your filing window.
Step 1: Send the preliminary notice before payment problems start
This is the step most contractors skip, and it is the one that determines whether you have lien rights at all.
There is no standardized mechanics lien process; each state has its own laws, regulations, and procedures. But nearly every state requires some form of preliminary notice early in the project. Miss this deadline and your contractor lien rights may be permanently barred, regardless of how much you are owed.
Here are the preliminary notice windows for four states:
| State | Preliminary Notice Deadline |
|---|---|
| California | Within 20 days of first providing labor or materials |
| Nevada | Within 31 days of first providing labor or materials |
| Oregon | Within 8 working days of first labor or materials |
| Washington | Within 10 days (single-family residences) or 60 days (all other projects) |
Oregon gives you 8 working days. That is barely over a week. If you are a sub on a large project and you wait until the GC misses a payment to think about lien protection, you are already months past your window.
In California, a direct contractor must serve a 20-day preliminary notice on the property owner, direct contractor, and construction lender under Civil Code § 8200(e). If you have a direct contract with the property owner, you only need to serve the construction lender. This notice is not aggressive. It is standard. Many contractors include it in their onboarding paperwork alongside the contract and scope of work.
Step 2: Attempt to collect before filing
Before recording a formal lien, send a notice of intent. This works as a warning, with the hope that the issue is resolved before a lien actually has to be filed. The notice specifies the amount owed, the GC who hired you, and a project description.
Many disputes resolve at this stage. The property owner realizes you are serious, checks in with the GC, and payment moves. Filing a lien does not mean there is an issue; it just means the contractor is trying to protect themselves. The same applies to the notice of intent. It is a business communication, not a threat.
This is also where your payment reminder workflow matters. A documented trail of invoices, reminders, and follow-ups strengthens your position if you do need to file. If your past due invoices have clear terms and timestamps, the notice of intent becomes a natural next step in a paper trail, not a sudden escalation.
Step 3: Prepare the lien document accurately
If the notice of intent does not produce payment, prepare the lien itself. The document typically includes a breakdown of the amount owed, including interest, fees, and additional costs, along with the project description and the GC who hired you.
Accuracy is critical. Some states will penalize filers who miscalculate the amount owed. If it is deemed you are intentionally dishonest, you may have to pay all legal and attorney fees for the opposing party. Overstating the amount, whether by padding hours or including work outside the contract scope, can turn a valid claim into a liability.
Check that the amount matches your invoices. If you charged late payment fees, verify that your contract terms authorize them and that the calculations are correct. The lien amount should be defensible down to the dollar.
Step 4: File with the county recorder and serve the owner
Once the lien is prepared, it must be filed through the appropriate county clerk's office within the required period of time and then served to the owner, contractor, and all relevant stakeholders.
One California-specific rule to watch: a direct contractor cannot record a lien until the entire project is actually or legally complete under Civil Code §8412. If you are a subcontractor or supplier, you must stop providing work or materials before recording a lien under Civil Code §8414. Continuing to perform work after recording a lien can make the lien premature and unenforceable.
Filing and enforcement deadlines by state
There are two critical deadlines: the deadline to file your lien (record the claim) and the deadline to enforce your lien (file a lawsuit to foreclose). Both vary by state, by your role on the project, and by whether a Notice of Completion has been recorded.
| State | Filing Deadline (No Notice of Completion) | Enforcement Deadline |
|---|---|---|
| California | 90 days after completion of entire work | 90 days after lien recordation |
| Nevada | 90 days after completion | 6 months after recordation |
| Oregon | 75 days after completion or cessation of work | 120 days after recordation |
| Washington | 90 days after last labor or materials | 8 months after recording |
Arizona's enforcement deadline is 6 months after recording the claim of lien, though filing deadlines vary. Check your state's specific statutes, as each state has its own laws, regulations, and procedures.
The Notice of Completion trap
In California, Nevada, and Arizona, an owner-recorded Notice of Completion can significantly shorten the lien filing deadline. California is the sharpest example: the window drops to 60 days for general contractors and 30 days for subcontractors after recordation of a Notice of Completion. Nevada shortens to 40 days from the recordation of a Notice of Completion.
An owner who records a Notice of Completion is not doing you a favor. They may be starting a clock you do not know about.
What happens if the lien does not get you paid
Recording a lien does not automatically force payment. To enforce it, you need to file a foreclosure lawsuit within the deadline for your state. That foreclosure action is the legal process used to enforce your lien rights.
If you miss the enforcement deadline, the lien generally becomes unenforceable in court. But even when a lien is no longer enforceable, it can still lead to payment because owners may want to clear title to sell or refinance. The recorded document still appears in county records and still clouds the title. That residual pressure is not as strong as a live lien, but it is not nothing.
And if the owner files for bankruptcy, a recorded lien dramatically increases the chances of getting paid. The property gets sold and proceeds go toward settling the contractor's debt.
The paperwork that makes all of this easier
Contractor lien rights depend on documentation. The preliminary notice requires accurate project details. The lien itself requires exact amounts. The enforcement lawsuit requires proof of work performed and payment terms agreed to.
Contractors who maintain clean records from project start rarely find themselves scrambling at this stage. That means:
- Signed contracts with payment terms and late payment policies spelled out
- Change orders documented and approved before work begins
- Invoices sent on schedule with clear line items
- Payment reminders sent automatically so there is a timestamped trail of every follow-up
The contractors who collect payment consistently are not necessarily better at chasing money. They are better at setting up systems that remove the need to chase. Automated reminders, structured payment schedules, and preliminary notices filed as standard practice. By the time a lien becomes necessary, every piece of supporting documentation already exists.