Preliminary notice in Alameda County, California

If you furnish labor or materials on a construction project in Alameda County, a preliminary notice is what protects your right to get paid. The rules are set by California state law — the same across every county — but where you ultimately record a mechanics lien is local to Alameda County. Here’s what subcontractors and suppliers in the county need to know.

What is a preliminary notice?

A preliminary noticeis a written notice that preserves your right to record a mechanics lien if you aren’t paid. California requires almost every subcontractor, supplier, and equipment lessor to serve one (Cal. Civ. Code §§ 8200–8216). Without it, you generally can’t enforce a lien — even for a valid debt.

The 20-day deadline applies in Alameda County

You must serve the notice within 20 days of first furnishing labor or materials to the project (Cal. Civ. Code § 8204). Serve it late and it only protects work from the 20 days before service. Use the preliminary notice deadline calculator to find your exact date.

Who you serve

Serve the owner or reputed owner, the direct (general) contractor, and the construction lender if there is one (Cal. Civ. Code § 8200). The accepted methods are certified or registered mail with return receipt, or personal delivery — see how to serve a preliminary notice.

Construction in Alameda County

Alameda County construction spans Oakland infill housing, East Bay commercial projects, and major transit and institutional work. Dense urban jobs with multiple tiers of subcontractors are common, which makes a clear, well-served preliminary notice essential.

Preliminary notice and mechanics lien rules apply to private projects throughout the county, including Oakland, Fremont, Hayward, Berkeley, San Leandro, Livermore, and Pleasanton. To confirm an owner or parcel before you serve, the Alameda County Assessor is a useful starting point.

Recording a mechanics lien in Alameda County

If you go on to record a mechanics lien, it must be recorded at the Alameda County Clerk-Recorder — the office that records liens and deeds for property in the county. A lien always gets recorded in the county where the property sits, so a Alameda County project means recording with the Alameda County recorder.

Your lien deadline is 90 days from completion, or as little as 30 days for subcontractors (60 for the direct contractor) if a Notice of Completion is recorded (Cal. Civ. Code §§ 8412, 8414). See the mechanics lien deadline guide for the full timeline.

This page is general information, not legal advice, and does not create an attorney–client relationship. California lien and notice deadlines are strict and fact-specific — “completion” alone can be triggered by actual completion, the owner’s occupancy or use, or a 60-day cessation of labor. Notice Harbor is not a law firm. Confirm any deadline that matters to your claim with a licensed California construction attorney.