Quick Answer

A Preliminary Notice (sometimes called a "20-day notice") is a document subcontractors and suppliers typically send to a property owner near the start of a construction project, informing them who's working on the property—a routine, expected part of the mechanic's lien process (see our separate guide) rather than a warning sign, worth understanding so it doesn't cause unnecessary alarm.

Why Property Owners Receive These Notices

Under California mechanic's lien law, most subcontractors and material suppliers who don't have a direct contract with the property owner (since they're typically hired by the general contractor, not you directly) are generally required to send this notice to preserve their right to potentially file a lien later if they aren't paid—this connects directly to the mechanic's lien risk covered in our separate guide.

Why This Notice Often Alarms Owners Unnecessarily

Receiving a notice mentioning liens and legal rights can feel alarming, especially early in a renovation project when everything seems to be going smoothly—but this is standard, routine practice, sent as a protective measure by nearly every subcontractor and supplier on nearly every project, not a signal that something has gone wrong or that you're specifically at risk.

What This Notice Actually Tells You

• Who is working on your project—the specific subcontractor or supplier's name and contact information, which can actually be useful information for your own records
• That this party intends to preserve their lien rights if they aren't paid—a protective step they're taking, not an accusation or a sign of a problem

Why This Connects to Protecting Yourself, Not Just the Subcontractor

Understanding who's sending you these notices actually helps you protect yourself against the mechanic's lien risk discussed in our separate guide—knowing the full list of parties working on your project (beyond just your general contractor) helps you verify, as your project progresses, that all of them are actually being paid, supporting the lien release practices discussed in that guide.

What to Do When You Receive a Preliminary Notice

1. Keep it for your records, ideally organized alongside your project's other documentation
2. Don't panic or assume something has gone wrong—this is standard, routine practice on the vast majority of construction projects, not a signal of a specific problem
3. Use it as part of your own tracking of who's working on your project, supporting your lien release practices as payments are made through the project

When a Preliminary Notice Might Warrant More Attention

• If you weren't aware a specific subcontractor was working on your project at all, it's worth confirming with your general contractor that this is expected and accounted for in your project scope
• If you're receiving notices from significantly more parties than seems consistent with your project's scope, it's worth a conversation with your general contractor to understand the full picture of who's involved

FAQ

Does receiving a preliminary notice mean I haven't paid someone?

No—this notice is typically sent near the start of work, well before any payment issue would even be relevant; it's a protective, routine step, not related to whether you've paid anyone yet.

Do I need to respond to a preliminary notice?

Generally no specific response is required from you—it's primarily informational, letting you know who's working on your project and that they're preserving their lien rights as a standard practice.

Should every subcontractor on my project send me one of these notices?

Generally yes, in most typical residential construction scenarios, though there can be some specific exceptions depending on contract structure—receiving notices from your project's various subcontractors and suppliers is standard and expected.

Does receiving these notices protect me from mechanic's liens?

Not directly by itself—but understanding who's working on your project, informed by these notices, supports the broader lien-release practices discussed in our mechanic's liens guide, which do provide real protection.

This is general information, not legal advice. Preliminary notice requirements and mechanic's lien law are detailed—consult a construction or real estate attorney for guidance specific to your project.

Bottom Line

A preliminary notice is standard, routine paperwork rather than a warning sign—understanding what it is (and isn't) prevents unnecessary alarm and actually supports your own ability to protect yourself against mechanic's lien risk as your project progresses.

Received a preliminary notice on your renovation project and want help understanding what it means? Let's walk through it together.

About The Parker George Team

Robert Parker and Josie George lead The Parker George Team , a Berkeley-based real estate team serving Berkeley, Oakland, Kensington, El Cerrito, Piedmont, Alameda, Albany, Emeryville, and Richmond. Robert holds the Certified Luxury Home Marketing Specialist (CLHMS) designation, and the team has been recognized by America's Best and featured in the San Francisco Business Times. Licensed with the California DRE (Robert #01923837, Josie #01990905), the team is based at 801 Delaware St, Berkeley, CA 94710.

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