Colorado Notice of Intent Deadlines: What Contractors Must Know Before Filing a Mechanic Lien

If you are a Colorado contractor, subcontractor, or supplier staring at an unpaid invoice, the notice of intent (NOI) to file a mechanic’s lien is often the step that gets skipped — and skipping it can wipe out lien leverage before you ever reach the county clerk. Under C.R.S. § 38-22-109(3), Colorado generally requires a notice of intent to file a lien statement served on the owner or reputed owner (or the owner’s agent) and on the principal or prime contractor (or that person’s agent) at least ten days before you record the lien statement. Service is by personal service or registered or certified mail, return receipt requested, to the last known address, and an affidavit of that service or mailing must be recorded with the lien statement.

Short version: correct parties, correct method, ten-day buffer, then file — and all of it still has to fit inside Colorado’s lien-statement deadlines under Title 38, Article 22.

What a Colorado NOI actually is

An NOI is not the lien. It is a formal notice that you intend to claim a lien if you are not paid. The lien itself is the sworn lien statement recorded with the county clerk and recorder under § 38-22-109(1)–(2). Under § 38-22-109(3), the NOI must happen before that recording if you want to preserve lien rights for work performed or laborers or materials furnished.

Think of it as a required fuse: cut it short, and the lien package may never get to light.

For the full deadline map (filing windows, foreclosure timing, related tools), see Darkwell’s hub: Colorado Mechanic Lien Guide 2026.

When NOI timing matters relative to last work

The statute’s 10-day clock runs backward from the day you plan to file the lien statement — not as a standalone “days after last work” NOI deadline invented online.

What does turn on last work / last furnish dates is the lien filing window. At a high level under § 38-22-109:

• Most claimants (typically GCs, subs, suppliers, and similar): file the lien statement before four months after that claimant’s last labor or last laborers or materials furnished (§ 38-22-109(5), subject to limited extension/termination rules).
• Day/piece labor without furnishing laborers or materials: a different rule tied to last labor and completion timing (§ 38-22-109(4)) — counsel should confirm which bucket you are in.

Practical takeaway: reverse-plan. Choose a filing date that still sits inside your filing window, then complete NOI service at least ten days earlier. Waiting on “one more payment promise” is how the 10-day buffer and the filing clock collide.

Exact “completion,” punch-list work, and abandonment (including the statute’s three-month discontinuance concept under § 38-22-109(7)) are fact-intensive. Verify dates with Colorado counsel — do not DIY a calendar from a blog.

Typical ways contractors blow the NOI

• Waiting for another verbal payment promise while clocks run
• Serving only the GC — or only the owner — when the statute calls for the owner side and the prime side (or their agents)
• Wrong project address or incomplete property ID
• Treating texts or casual emails as statutory service
• Serving an NOI but forgetting the recorded affidavit with the lien statement
• Confusing the NOI with the optional extension notice under § 38-22-109(10)–(11) (a different tool)

Document checklist before you send an NOI

1. Signed contract / PO and scope
2. Change orders and written extras
3. Invoices, pay apps, and payment history
4. Last day on site / last labor or last materials furnished (with backup)
5. Owner / reputed owner names and last known addresses
6. Principal / prime contractor names and last known addresses
7. Property address and any legal description you have
8. Photos, delivery tickets, and written payment promises

Still organizing an unpaid file? Start here: Contractor Not Getting Paid.

What happens after the NOI

An NOI can open a short negotiation window. Sometimes owners or GCs pay or settle once they see a real recording clock. Sometimes they ignore it.

Do not assume NOI = payment. Use the waiting period to finalize the lien statement (parties, description, amount due, verification) so you can file cleanly after the ten days — still inside the applicable filing deadline. Overclaiming carries risk under Colorado’s excessive-lien rules; accuracy matters.

If the fight turns into retainers, filing fees, and foreclosure timing, that is a capital problem. For how the six-month enforcement clock works after a lien is recorded, see Mechanic Lien Foreclosure Timeline. See also Mechanic Lien Attorney Alternative for how funding differs from hiring counsel. Sub not paid by the GC? See Subcontractor Not Paid by the General Contractor in Colorado? Owner is an LLC or house flipper? See Can You Put a Lien on an LLC’s Property?

If the deadline already slipped

Missing NOI or lien timing can eliminate statutory lien leverage. That does not automatically answer every contract question — and it does not mean anyone can promise a recovery. A licensed Colorado attorney can evaluate what, if anything, remains. If the blocker is cash to retain counsel, capital may be worth reviewing. No outcome is guaranteed.

Common questions

How many days before filing must I serve a Colorado notice of intent? At least 10 days before you record the lien statement (C.R.S. 38-22-109(3)).

Who has to get the notice? The owner or reputed owner, or the owner’s agent, and the principal or prime contractor, or that person’s agent.

How do I serve it? By personal service, or by registered or certified mail, return receipt requested, to the last known address. Record an affidavit of service with the lien statement.

When does the lien statement itself have to be recorded? For most claimants, within four months after the last labor or materials (C.R.S. 38-22-109(5)). The 10-day notice has to fit inside that window.

Related reading: Colorado mechanic lien foreclosure timeline · Mechanics lien deadlines by state · Contractor not getting paid

How we get paid and where we work

Our fee comes out of the recovery, not your pocket. If there’s no recovery, you don’t repay our funding. Your written agreement sets the exact terms.

We fund business claims, and individual and consumer claims in some states, reviewed state by state where the law allows. Cash claim purchases are offered only for select business claims and only where state law allows.

Darkwell does not buy or collect consumer debt.

Owed $10,000 or more? Request a free claim review. Not legal advice.

What to do next

1. Write down last work / last furnish dates and the parties on the job.
2. Have a Colorado construction attorney confirm whether NOI + lien still fit your facts.
3. Serve a proper NOI (method + recipients + affidavit plan) before recording.
4. If enforcement cost — not the underlying invoice — is the bottleneck, request a free claim review.

Free claim review (not legal advice)

If an NOI or lien deadline is closing and you cannot float a retainer, submit a free claim review at Darkwell Capital.

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Statutes cited: C.R.S. § 38-22-109 (esp. (3)–(5), (7), (10)–(11)); related enforcement context in § 38-22-110.

Colorado lien & payment guides: Lien Foreclosure Timeline · Lien Expired: Now What · Owner Bonded Off Your Lien · Construction Trust Fund Statute · Pay-If-Paid Clauses · Unpaid Retainage · Prompt Payment Laws