The California 20-day preliminary notice is the document subcontractors, material suppliers, and equipment lessors must send within 20 days of first providing work on a project to preserve the right to file a mechanics lien, stop payment notice, or payment bond claim. Send it on time and your claim reaches every dollar of work you contribute from day one. Send it late and you only get credit for work performed within the 20 days before you served it.1Justia. California Code 8200-8216 – Preliminary Notice
Who Has to Send One
The requirement applies to anyone who provides work but does not have a direct contract with the property owner. That covers most subcontractors, material suppliers, and equipment rental companies. Without a timely preliminary notice, none of them can pursue a lien, stop payment notice, or bond claim.1Justia. California Code 8200-8216 – Preliminary Notice
Two exceptions matter. Laborers are exempt entirely. A direct contractor who signed with the owner only has to serve the construction lender, and if there is no lender, has no notice obligation at all.1Justia. California Code 8200-8216 – Preliminary Notice
Everyone else serves three parties: the property owner (or reputed owner), the direct contractor above you, and the construction lender if one exists. Owners two or three tiers up the chain often have no idea who is actually on their project. The notice puts them on record that you are there and that your unpaid invoice can attach to their property.
What the Form Must Contain
The content requirements come from two statutes. Civil Code Section 8102 sets the identification information every California construction notice must carry. Section 8202 adds the pieces specific to the preliminary notice.
Identification Details
Section 8102 requires the name and address of the property owner or reputed owner, the name and address of the direct contractor, and the name and address of the construction lender if any.2California Legislative Information. California Code CIV 8102 The information is required only “to the extent known” to you, so a blank lender field after a genuine effort to identify one won’t automatically kill the notice.
The form also needs a description of the job site sufficient to identify it, including the street address if one exists. A legal description of the property satisfies this requirement even if the street address is wrong or missing.2California Legislative Information. California Code CIV 8102
Work Description and Price Estimate
Section 8202 adds a general description of the work you’re providing and an estimate of the total price of work you have provided and expect to provide.3California Legislative Information. California Civil Code 8202 – Preliminary Notice The description does not need to be exhaustive. “Electrical rough-in and finish work” or “concrete supply for foundation and flatwork” works. The price should be a good-faith estimate covering your full scope, since it signals to the owner the size of any potential lien.
If you are a subcontractor with unpaid laborers, the notice must also include the names and addresses of those unpaid laborers.3California Legislative Information. California Civil Code 8202 – Preliminary Notice
The “Notice to Property Owner” Warning
Section 8202 requires the form to include a specific block of text titled “NOTICE TO PROPERTY OWNER” printed in boldface type.3California Legislative Information. California Civil Code 8202 – Preliminary Notice The warning tells the owner that a lien can still attach to the property even if they’ve paid the contractor in full, and advises them to require signed lien releases before releasing money.
The wording is set by statute. Editing it or leaving it out risks invalidating the entire notice, which means losing your lien rights for the work the notice was supposed to protect. If you’re using a downloaded PDF template, check that the warning language matches the current text of Section 8202 word for word before you sign anything.
The 20-Day Deadline and What a Late Notice Costs
You must give the preliminary notice no later than 20 days after you first provide work on the project.4California Legislative Information. California Code CIV 8204 Meet the deadline and your lien rights cover every hour and every dollar you’ve contributed from day one.
Miss it and you can still send a notice, but the protection shrinks. A late notice only covers work performed within the 20 days before the date you served it, plus anything you provide afterward.4California Legislative Information. California Code CIV 8204 Everything before that 20-day lookback is gone. Supply $50,000 in materials over three months and wait until month two to send the notice, and a large slice of that supply falls outside your claim. This is where suppliers and subs most often get hurt, and it is entirely preventable by treating the notice as a day-one task.
How to Serve the Notice
Civil Code Section 8106 allows service by personal delivery, by mail under Section 8110, or by substitute service using the same rules that apply to serving a lawsuit summons.5Justia. California Code Civil Code 8100-8118
For mail, Section 8110 specifies registered mail, certified mail, express mail, or overnight delivery by an express service carrier.5Justia. California Code Civil Code 8100-8118 These methods produce a tracking record proving when you mailed the notice and to whom. Adding a return receipt gets you a signed confirmation from the recipient for a small extra cost. Ordinary first-class mail is not on the approved list, and relying on it is a gamble that can cost you the whole claim if delivery is later challenged.
The address matters as much as the method. Section 8108 allows service at the recipient’s residence or place of business, or at addresses shown on the direct contract, the building permit, the construction loan agreement, or Contractors’ State License Board records.5Justia. California Code Civil Code 8100-8118 Wrong address can be as fatal as a missed deadline. If the building permit shows a different address than your contract, serve both to be safe.
Proof of Service and Recordkeeping
Sending the notice is only half the job. You also need a proof of service, a signed statement recording how, when, and to whom the notice was served, including the date of mailing, the addresses used, and the delivery method. If a dispute reaches court, that document is your primary evidence that you followed the statute.
Attach postal receipts, tracking confirmations, and any returned green card to the proof of service and keep the originals together. These records feel like paperwork for paperwork’s sake until the other side claims nothing ever arrived.
Public Works Projects
Public property cannot be liened, so on a government job the preliminary notice preserves a different set of rights: filing a stop payment notice against project funds and pursuing a claim on the contractor’s payment bond.6California Legislative Information. California Code 9300 – Preliminary Notice
Under Civil Code Section 9300, the notice goes to the public entity and the direct contractor. Compliance is a prerequisite to both a valid stop payment notice and any payment bond claim.6California Legislative Information. California Code 9300 – Preliminary Notice Skip it and you lose both recovery paths, which are usually the only ways to collect on a government job.
Content requirements under Section 9303 are similar but simpler: the general description of work, a price estimate, and the Section 8102 identification details. There is no “Notice to Property Owner” block because the owner is a public entity, not a consumer. For projects run by the California Department of Public Works or the Department of General Services, the notice to the public entity must be directed to the disbursing officer of that department.7Justia. California Code Civil Code 9300-9306
Federal Projects Are Different
If the project is federally funded and the contract exceeds $100,000, the Miller Act replaces California’s preliminary notice system. There is no 20-day preliminary notice at the start of work. Second-tier subcontractors and suppliers, meaning those who contract with a subcontractor rather than with the prime, must send written notice to the prime contractor within 90 days after the last day they provided labor or materials. First-tier subs contracting directly with the prime do not need to send this notice at all. Suit on the payment bond can be filed no earlier than 90 days after your last day of work and no later than one year after that date.8Office of the Law Revision Counsel. 40 USC 3133 Third-tier and lower subs have no Miller Act rights.
What the Notice Does and Doesn’t Do
The preliminary notice does not file a lien. It preserves your ability to file one later if payment falls through, and it does the same job for stop payment notices and bond claims. A perfectly recorded mechanics lien is worthless if the preliminary notice was never sent or was sent late enough to strand most of the work outside its coverage window.
Treat the notice as a day-one task on every new project. The few minutes it takes to fill out the form and drop it in certified mail is the difference between a claim you can enforce and an invoice you can only hope gets paid.