How Does California's 20-Day Preliminary Notice Work?

A preliminary notice is the first step of California's lien process for private works, the "notice provided for in Chapter 2 (commencing with Section 8200)" (Civ. Code § 8034). Section 8200 says "before recording a lien claim, giving a stop payment notice, or asserting a claim against a payment bond, a claimant shall give preliminary notice" to the owner or reputed owner, the direct contractor the claimant works under, and the construction lender, if any (Civ. Code § 8200). Compliance "is a necessary prerequisite to the validity of a lien claim or stop payment notice." For the lien itself, see what a mechanic's lien is.

"A preliminary notice shall be given not later than 20 days after the claimant has first furnished work on the work of improvement" (Civ. Code § 8204). "Work" means "labor, service, equipment, or material provided to a work of improvement" (§ 8048), so the clock starts with your first delivery or your first day on site, whichever comes first.

Missing the 20 days does not end your rights. The same section says a claimant who did not give notice is not precluded from giving it later, but can record a lien, give a stop payment notice and claim on a bond "only for work performed within 20 days prior to the service of the preliminary notice, and at any time thereafter." Work before that window is unprotected. A design professional who gives notice within 20 days after the work of improvement has commenced is covered for its design services.

If the 20th day lands on a Saturday, Sunday or holiday, Code of Civil Procedure § 12a extends a period "provided or required by law" to the next day that is not a holiday, and it counts all of Saturday as a holiday (CCP § 12a). Don't plan around it: mail the notice the day you start.

Section 8202 requires the notice to meet the general rules for notices in § 8102 and add three things (Civ. Code § 8202; § 8102):

• From § 8102, to the extent known: the owner's or reputed owner's name and address; the direct contractor's; the construction lender's, if any; a description of the site, including its street address; your name, address and relationship to the parties; a general statement of your work; the name of the person you work for; and a statement or estimate of your demand.
• "A general description of the work to be provided."
• "An estimate of the total price of the work provided and to be provided."
• The statement the statute prints in boldface, which begins "NOTICE TO PROPERTY OWNER EVEN THOUGH YOU HAVE PAID YOUR CONTRACTOR IN FULL" and explains that an unpaid claimant may place a lien on the property. Copy it word for word from § 8202(a)(3).

A notice "is not invalid by reason of any variance" if it substantially informs the person given notice (§ 8102(b)). The direct contractor "shall make available to any person seeking to give preliminary notice" the owner's and lender's names and addresses (§ 8208), so ask the GC for them when you sign. One notice covers all your work for that job, including work outside its description, unless you work under more than one subcontract there (§ 8206).

Notice must be in writing (§ 8100) and given by personal delivery, by mail as § 8110 provides, or by leaving it and mailing a copy as the Code of Civil Procedure allows for a summons (§ 8106). Mail means "registered or certified mail, express mail, or overnight delivery by an express service carrier" (§ 8110). Notice by mail is "complete and deemed to have been given" when deposited in the mail or with the carrier (§ 8116).

Keep the proof together for each job. Section 8118 requires a proof of notice declaration stating the notice given, the date, place and manner, and who received it, with the postal or carrier receipt or tracking record attached (§ 8118). You may also file the notice with the county recorder, which then mails filers a notice when a notice of completion or cessation is recorded on the property (§ 8214); that filing is optional and gives no notice to anyone else.

For a licensed subcontractor whose contract pays more than $400, failing to give the notice "constitutes grounds for disciplinary action" under the Contractors' State License Law (§ 8216). On home improvement jobs, the contract's required Mechanics Lien Warning tells the homeowner to expect these notices and to pay with joint checks (Bus. & Prof. Code § 7159(e)(4)).

A fictional tile subcontractor first delivers material to a fictional private remodel on Monday, March 2, 2026. Day one of the count is the day after (CCP § 12 excludes the first day), so the 20th day is Sunday, March 22.

The count: March 2 plus 20 days is March 22. From April 15, 20 days back is March 26 (15 days back to March 31, five more). After the notice, the lien deadline itself is counted from completion of the whole project; see mechanic's lien deadlines.

Send California's preliminary notice the day you first deliver or start, by certified or overnight mail, with the statute's boldface wording and a fair estimate of your price, and keep the receipt with a proof of notice declaration. A late notice protects only work from 20 days before it.

Retention on the same private job has its own deadlines: see California retainage law. When you are paid, sign the right waiver (conditional vs unconditional), and for the rest of getting paid, see the subcontractor's guide.

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1. California Civil Code § 8034 — California Legislative Information. Read October 22, 2026.
2. California Civil Code § 8102 — California Legislative Information. Read October 22, 2026.
3. California Civil Code §§ 8106, 8110, 8116 and 8118 (giving notice) — California Legislative Information. Read October 22, 2026.
4. California Civil Code § 8200 — California Legislative Information. Read October 22, 2026.
5. California Civil Code § 8202 — California Legislative Information. Read October 22, 2026.
6. California Civil Code § 8204 — California Legislative Information. Read October 22, 2026.
7. California Civil Code §§ 8206, 8208, 8214 and 8216 — California Legislative Information. Read October 22, 2026.
8. California Code of Civil Procedure §§ 12 and 12a — California Legislative Information. Read October 22, 2026.
9. California Business and Professions Code § 7159 — California Legislative Information. Read October 22, 2026.
10. Legislative information bulk download (pubinfo), the codes' official text — California Legislature. Read October 22, 2026.