Updated August 2025 | All statutory references in this article reflect Colorado Revised Statutes 2024
A Notice of Intent to Lien (NOI) is Colorado’s statutory ten-day demand letter: before any mechanics-lien statement may be recorded, the would-be lienor must serve written notice on the owner under Colo. Rev. Stat. § 38-22-109(3). The NOI’s practical purpose is to give the owner one last opportunity to satisfy the debt and avoid a cloud on title. Because title companies, lenders, and owners are highly sensitive to liens appearing in property records, the NOI often triggers immediate action. Many claimants report that simply serving the NOI resolves payment disputes before lien filing is necessary.
Treat the NOI as part of project close-out if it is not on your calendar, your lien rights can evaporate overnight.
Who Must Serve a Notice of Intent?
Colorado is all-inclusive: every class of mechanics-lien claimant GCs, subcontractors, suppliers, equipment lessors, architects, and engineers must serve the NOI. Even claimants who have already sent a courtesy preliminary notice must still deliver the NOI because it is the sole condition precedent to perfecting a lien.
This requirement can catch professionals by surprise, especially design professionals or equipment lessors who may not expect to be treated the same as contractors or suppliers. Regardless of role, if you furnish labor or materials and intend to secure the project, assume the NOI is mandatory; the statute draws no distinction based on contract tier or project size.
When Is the NOI Served?
The statute is blunt: the NOI must be served at least ten (10) days before the lien statement is filed. Importantly, the NOI does not pause or extend Colorado’s lien filing windows.
- Most claimants: record the lien within four months after last work or last furnishing (§ 38-22-109(5)).
- Labor-only claimants working by the day or piece without furnishing materials: record within two months after the improvement is completed (§ 38-22-109(4)).
Because the NOI is a “count backward” deadline, organization is critical. Calendar backward from the lien deadline; missing the NOI deadline by even a single day voids the lien. Many companies integrate NOI reminders into project management or accounts receivable workflows so staff aren’t calculating under pressure.
Transition tip: Create two reminders one 30 days before the lien sunset and another 12 days before, giving you a cushion for returned mail. Filing early is always safer than cutting it close.
What If You Failed to Serve the Noi in Colorado
Courts characterize the NOI as jurisdictional. A lien recorded without timely service is void ab initio and cannot be resurrected through amendment, equitable arguments, or later service. In short, no notice, no lien no excuses.
Claimants sometimes assume that “substantial compliance” or “good faith” might save a defective lien, but Colorado courts have repeatedly rejected that argument. If the NOI isn’t done right, the lien is unenforceable no matter the circumstances.
Pro-tip: If you discover the oversight after your four- or two-month filing period, pivot to alternate remedies such as breach of contract or trust-fund theft.
How to Serve the NOI
Step 1 Prepare the Notice
The document should identify claimant and owner, describe the property, itemize the exact balance due, and state unequivocally that a mechanics lien will be recorded if payment is not received within ten days. Knowingly overstating the balance forfeits the lien and exposes the claimant to a fee award under § 38-22-128.
Confirm figures against invoices and contracts before sending. Best practice is to attach the notarized lien statement you expect to file; Colorado precedent approves a combined NOI/lien form so long as recording waits ten days. Using clear, professional language reduces the chance of disputes over sufficiency.
Step 2 Serve the Notice
Permitted methods are personal delivery or registered or certified mail, return-receipt requested, to both the owner (or reputed owner) and the prime contractor. If mail is returned, a follow-up attempt to a known alternate address such as a post-office box demonstrates reasonable diligence.
Keep the green card or a sworn affidavit of personal service; the affidavit must accompany the lien statement when recorded. Documentation of service is critical. Courts expect a verifiable paper trail, so retain envelopes, receipts, or affidavits in your project file.
Transition tip: Serving the GC, while not required, often prompts upstream pressure that resolves payment before the lien is needed.
Best Practices & Practical Pointers
- Serve early. Mailing on day minus-ten is gambling on postal reliability.
- Use conspicuous language “THIS IS YOUR TEN-DAY NOTICE OF INTENT TO FILE A COLORADO MECHANICS LIEN.”
- Double-check addresses against the current tax roll and your contract dossier.
- After the ten-day standstill, record immediately if payment is still outstanding; the four- or two-month statute is unforgiving.
- File a satisfaction of lien promptly if the debt is paid; failing to release can trigger owner claims for slander of title.
Many professionals treat the NOI as both a compliance step and a negotiation tool. A clear, well-documented NOI often accelerates resolution because owners want to avoid the costs, delays, and reputational impact of liens. By aligning calendars, drafting a precise NOI, and documenting service, claimants convert Colorado’s rigid notice prerequisite from a trip-wire into a persuasive payment tool while preserving the nuclear option of a perfected mechanics lien.