Notice of Completion in California
The one document that can quietly cut your 90-day lien window to 30 — and how to make sure it never catches you off guard.
A Notice of Completion (NOC)is a document the property owner can record with the county recorder within 15 days of a project’s completion (Cal. Civ. Code § 8182). It looks harmless — but for subcontractors it’s the single most dangerous piece of paper in California lien law, because it cuts your mechanics lien deadline from 90 days to 30 without anyone knocking on your door.
What a Notice of Completion does to your deadlines
- No NOC recorded: you have 90 days from completion of the whole project to record a mechanics lien (§ 8412).
- NOC recorded: subcontractors and suppliers have 30 days from the recording date; the direct contractor has 60 (§§ 8412, 8414).
Thirty days is not much runway — especially if you’re still invoicing, chasing a payment promise, or waiting to see whether the GC makes things right. Many subs first learn an NOC was recorded when their lien window has already closed.
The owner is supposed to tell you — sometimes
If you served a preliminary notice on the job, the owner must send you notice of the recorded NOC within 10 days (Cal. Civ. Code § 8190). If the owner fails to, the shortened deadline generally doesn’t apply to you and the standard 90-day window governs. Two catches: owners don’t always comply, and proving non-receipt after the fact can turn into a dispute. The safe play is to know about the NOC the day it’s recorded, not to litigate about notice later.
How to protect yourself
- Serve your preliminary notice on every job.It preserves your lien rights and triggers the owner’s § 8190 notice duty.
- Watch the recorder’s office — or let a service do it. Notice Harbor monitors your jobs and alerts you the moment a Notice of Completion changes your window, with your new deadline already calculated.
- Don’t sit on unpaid invoices. If payment is slow when the project wraps, send an intent to lien letter early — waiting burns window you may not have.
Frequently asked questions
Related guides
Never get blindsided by a Notice of Completion
Notice Harbor monitors your jobs and alerts you the moment your lien window changes — with the new deadline already calculated. Your first notice is free.
Start your free noticeThis 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.