Mechanics Liens in California: What Homeowners Should Know

What a Mechanics Lien Is — and Why It Can Freeze Your Property

Imagine finishing a kitchen remodel, listing your home for sale, and watching the deal collapse because a tile supplier you never met recorded a claim against your property. That is the reality of a mechanics lien — and in California, it can happen faster than most homeowners expect.

A mechanics lien is a legal claim that contractors, subcontractors, laborers, and material suppliers can record against your property if they aren't paid for work or materials, according to the Contractors State License Board. Under Civil Code § 8400, lien rights extend well beyond the person you hired: direct contractors, subcontractors, material suppliers, laborers, equipment lessors, and even design professionals like architects and engineers can all assert a claim (California legal analysis confirms this broad scope).

The practical consequence is a cloud on your title. A recorded lien attaches to the real property and survives even if the home is sold, meaning you cannot transfer clear title until the lien is satisfied or released. Liens can freeze an active project, block construction loan draws, and make selling or refinancing nearly impossible (surety industry guidance notes the financing impact directly).

Who can file against your home:

• Direct contractors — the company you signed with
• Subcontractors and laborers working under that contractor
• Material and equipment suppliers who furnished goods to the project
• Design professionals, including architects and engineers

There is one critical exception that shifts power to homeowners: unlicensed contractors have zero lien rights. Under Business & Professions Code § 7031, an unlicensed contractor cannot file a mechanics lien or even sue for compensation — even if the work was performed competently (statutory analysis makes this exception explicit). The CSLB likewise advises hiring only licensed contractors and verifying licenses before signing any contract (CSLB prevention guidance).

That makes license verification your first line of defense — before any contract, deposit, or demolition day. The Altadena Builder Directory builds this step into every listing in its registry, verifying each builder's license against CSLB records so homeowners aren't left discovering licensing problems after a dispute arises. For owner-occupied residences of one to four units, California adds another protection: the right to receive a preliminary notice before any lien rights attach, giving you early visibility into everyone who could later claim against your property.

The Lien Timeline: Every Deadline Homeowners Need to Track

Mechanics lien deadlines in California are unforgiving — miss one by a single day, and a lien that once clouded your title becomes legally unenforceable. For homeowners, knowing this clock is just as valuable as it is for contractors, because it tells you exactly how long your property is exposed.

The timeline starts before work even begins. Subcontractors and suppliers who might later file a lien must serve a preliminary notice within 20 days of first furnishing labor or materials, per CSLB guidance. A late notice limits their recovery to work performed in the 20 days before service. Laborers and your direct contractor don't have to send one.

Once the project wraps up, the single most powerful move a homeowner can make is recording a Notice of Completion within 15 days. This simple filing slashes the direct contractor's lien window from 90 days to 60, and cuts subcontractors' and suppliers' windows from 90 days to just 30. Skip it, and everyone retains the full 90 days after completion to record a lien against your home.

From there, the clock runs through several critical checkpoints:

• Direct contractors must record a lien within 90 days of completion — or 60 days after a Notice of Completion is recorded.
• Subcontractors and suppliers have 90 days from completion, or just 30 days after a recorded Notice of Completion.
• Whoever records a lien must serve you a copy within 10 days under Civil Code § 8416(c).
• A foreclosure lawsuit must be filed within 90 days of the lien's recording — an absolute deadline that, if missed, releases the lien by operation of law with no revival.

That final 90-day deadline is the one that matters most to homeowners. As California business litigation attorney Pavel Kolmogorov explains, if the claimant fails to sue in time, the lien dies and cannot be brought back. If a lien on your property has passed that mark, it's unenforceable — and you can demand its release.

Here's the catch: expiration doesn't erase the paperwork. An expired lien remains on county records and continues to cloud your title until it's formally released, which can still block a sale or refinance. You can demand voluntary release; if the claimant refuses, you can petition the court to remove it.

The best defense, of course, is never facing the clock at all. Verifying contractor licenses before signing — unlicensed contractors have no lien rights under B&P Code § 7031 — is the highest-leverage protection, which is why every builder listed on the Altadena Builder Directory is license-verified against the CSLB. Combine that with prompt preliminary-notice tracking and a timely Notice of Completion, and most of these deadlines never become your problem.

How to Prevent a Lien Before It Ever Gets Filed

The best time to stop a mechanics lien is before the first nail is driven. California's Contractors State License Board lays out a clear prevention playbook, and homeowners who follow it rarely see a lien filed against their property.

Start with license verification. Under Business & Professions Code § 7031, unlicensed contractors have no lien rights at all — but hiring one trades a lien risk for far bigger problems. The CSLB advises verifying every contractor's license on its website before signing anything. The Altadena Builder Directory runs this check for every listed builder, so you're not taking a contractor's word for it.

Collect and date every preliminary notice. Any subcontractor or supplier who wants lien rights must serve you a preliminary notice within 20 days of first furnishing labor or materials. If they never send one, they generally lose the right to lien your home. Save each notice and note the date it arrived — this paper trail tells you exactly who could file a claim.

Pay with joint checks. The CSLB calls joint checks — written to both the contractor and the subcontractor or supplier — the simplest way to prevent liens and ensure that subcontractors and suppliers are paid. Money can't be diverted if it requires two signatures.

Use lien releases on every payment. California law gives you a powerful lever here: you may withhold the next payment until unconditional releases for the previous payment are in hand. The CSLB recommends:

• Get a conditional waiver before each payment, covering the amount you're about to release
• Get an unconditional waiver after each payment clears
• Refuse the next scheduled payment until prior unconditional releases arrive
• Match releases against the preliminary notices you've collected to confirm nothing is outstanding

Finally, file a Notice of Completion with your county recorder within 15 days of project completion. That single recording cuts the direct contractor's lien window from 90 days to 60, and subcontractors' and suppliers' from 90 to just 30 — a dramatic shrink in your exposure window, per CSLB guidance.

A written contract with phase-based payments and named subcontractors ties all of this together, letting you verify work and match every dollar against a release.

A Lien Was Filed — Your Three Paths to Clear Title

A recorded lien doesn't mean you've lost — but it does mean the clock is running. A lien clouds your title and can block a sale or refinance until it's resolved, so homeowners need to know the three concrete paths back to clear title.

Path 1: Petition the court for release. If the lien is expired, untimely, or simply meritless, you can petition the court to release it under Civil Code § 8480. A California construction litigation guide notes that homeowners may also recover attorney's fees when the claimant acted in bad faith — a meaningful deterrent against lien abuse.

Path 2: Bond off the lien. When a closing date is looming, you don't have time to litigate. California requires a release bond of 125% of the lien amount, which transfers the lien from your property to the bond and clears title immediately. Premiums typically run 1–3% of the bond amount, and the claimant generally has about one year to sue against the bond instead of your home, according to a surety industry guide. As surety expert Greg Rynerson puts it, even if you believe the lien is invalid, posting a bond removes the cloud on your title while you contest it in court.

Path 3: Demand release of an expired lien. A lien that missed its deadlines isn't automatically erased — it stays on county records and can still block transactions until formally released. As one lien services analysis explains, liens are meant to be temporary, not a permanent cloud on title. Send a written demand for voluntary release; if refused, you can sue to remove it.

Before choosing a path, check the lien's timeline against these key deadlines:

• 90 days — the claimant's window to record a lien after completion (60 days for direct contractors, 30 days for subs and suppliers, if you recorded a Notice of Completion)
• 90 days — the absolute deadline to file a foreclosure lawsuit after recording; miss it and the lien is released by operation of law
• 10 days — the deadline for the claimant to serve you a copy of the recorded lien

The bond route can be decisive under deadline pressure. In one documented case, a California developer faced a $250,000 subcontractor lien with a sale closing in just 30 days. A 125% release bond — $312,500 — cleared title immediately and let the deal close while the dispute played out against the bond instead of the property.

The cheapest remedy, of course, is prevention: unlicensed contractors have no lien rights at all under B&P Code § 7031, which is why the Altadena Builder Directory verifies every listed contractor's license against CSLB records before they appear in our registry. A two-minute license check today can save you from ever needing a $312,500 bond.