Colorado Mechanics Lien Law: Notices, Deadlines, Lien Rights, and Licensing

A mechanics lien is a legal claim against improved real property that helps secure payment for labor, materials, equipment, or professional services furnished to a construction project. In Colorado, it is a useful payment-security tool because it can give contractors, subcontractors, suppliers, design professionals, and others a recorded claim against the property improved by their work.

This guide is a broad, every-role overview of Colorado mechanics lien law. For a subcontractor-focused walkthrough of the deadlines, the trust fund statute, and disburser notices, see our companion guide, How a Colorado Subcontractor Protects the Right to Get Paid.

1. Colorado Lien Notices: The 10 Day Notice of Intent Is Required Before Recording

The key point is that Colorado does not use a universal early preliminary notice like California, but it does require a notice of intent to file a lien statement before the lien is recorded.

Under C.R.S. § 38-22-109, a claimant must serve a notice of intent to file a lien statement on the owner or reputed owner, or the owner's agent, and on the principal or prime contractor, or the contractor's agent, at least 10 days before recording the lien statement with the county clerk and recorder. Service may be made by personal service or by registered or certified mail, return receipt requested, to the last known address. An affidavit of service or mailing must be recorded with the lien statement.

This notice is not just a collection letter. It is a statutory step that must occur before recording. A claimant should include enough information to identify the project, the property, the claimant, the party who owes the money, and the amount claimed. The safest practice is to attach the proposed lien statement or provide the same core information that will be recorded.

Optional notice to owner or disburser can protect payment flow

Colorado also allows lower-tier claimants to give written notice to the owner, superintendent, architect, financing institution, or other person disbursing construction funds that they have furnished or will furnish labor, laborers, or materials. Under C.R.S. § 38-22-102, after that notice is given, the person who contracted with the principal contractor must withhold sufficient money to satisfy the claim and any lien that may be filed. This is not the same as the required 10 day notice of intent, but it can be an important payment-protection tool before the lien stage.

Owners and landlords may use notice of nonliability in some situations

If improvements are made with the knowledge of an owner or person claiming an interest in land, Colorado law may treat the work as being done at that person's instance unless the owner timely gives notice that the interest is not subject to lien. C.R.S. § 38-22-105 describes the notice procedure, including posting within five days after the owner obtains notice of the work.

2. Colorado Mechanics Lien Timing Requirements

The key point is that Colorado lien deadlines are short, and the recording deadline depends on the claimant's role.

The lien statement is recorded with the county clerk and recorder in the county where the property, or the principal part of it, is located. The statement must include the owner or reputed owner, the claimant, the person who furnished the laborers or materials or performed the labor, the contractor when the lien is claimed by a subcontractor or assignee of a subcontractor, a property description sufficient to identify the property, and the amount due. The statement must be signed and sworn. C.R.S. § 38-22-109.

Under C.R.S. § 38-22-110, a lien does not hold the property longer than 6 months after the last work or labor is performed, or laborers or materials are furnished, or after completion of the improvement as prescribed in § 38-22-109, unless an action is commenced within that time and a notice stating that the action has been commenced is recorded within that time.

The safest approach is to calculate the 4 month or 2 month lien recording deadline from the claimant's own last substantial work or last furnishing, then calendar the 10 day notice period before that recording date, and separately calendar the 6 month enforcement deadline.

3. Colorado Lien Amounts: Contract Price, Value, and Owner Payment Issues

The key point is that Colorado lien rights can reach the contract price and, in some circumstances, the value of work and materials furnished.

C.R.S. § 38-22-101 provides lien rights for the value of laborers, machinery, tools, equipment, services, labor, and materials furnished for a covered improvement. When there is a contract between the reputed owner and a contractor, the lien can extend to the entire contract price, and the contract operates as a lien in favor of persons performing labor or services or furnishing laborers or materials under contract with that contractor, to the extent of the whole contract price. After those liens are satisfied, any balance may support the contractor's lien.

Colorado also has owner-protection rules. C.R.S. § 38-22-102 regulates payments and provides that certain premature payments do not defeat or reduce lien rights of unpaid lower-tier claimants. For certain single-family residential property, however, Colorado recognizes an affirmative defense when the owner has paid enough to satisfy the owner's contractual and legal obligations to the principal contractor or subcontractor for the purpose of paying subcontractors and suppliers.

The practical point is that claimants should make the lien amount project-specific and supportable. The amount should be based on unpaid labor, materials, equipment, or services furnished for that property, after proper credits. It should not include unrelated debts, inflated charges, or amounts that cannot be tied to the project.

4. Who Can Claim a Colorado Mechanics Lien, and Who Cannot

The key point is that Colorado's lien statute is broad, but a claimant still must fit within the statute and connect its work to the property.

C.R.S. § 38-22-101 grants lien rights to many project participants, including mechanics, materialmen, contractors, subcontractors, builders, persons furnishing laborers, machinery, tools, or equipment, and persons performing labor or furnishing materials used in construction, alteration, improvement, addition, or repair. It also includes architects, engineers, draftsmen, artisans, and certain professionals who furnish designs, plans, specifications, drawings, estimates, surveys, superintendence, or other professional or skilled services connected with the improvement.

Important limits apply:

• Suppliers to suppliers should not assume lien rights. Colorado's statute is broad, but remote supply-chain claims can raise proof and statutory-coverage issues.
• Materials and equipment must be connected to the specific project. Delivery records, invoices, job numbers, rental records, and use records should tie the claim to the property being liened.
• Public property generally cannot be liened. On public projects, bond claims and statutory payment remedies are usually the relevant tools.
• Owner knowledge and authorization matter. Colorado treats contractors and those in charge of work as agents of the owner for lien purposes in many circumstances, but owners and landlords may have notice-of-nonliability tools in certain cases.
• Professional services can qualify. Design and professional services may support lien rights when they fall within the statutory language and relate to the improvement.

The best practice is to identify the claimant's tier, contracting party, last furnishing date, property description, and unpaid project amount before serving the 10 day notice of intent.

5. Contractor Licensing Can Affect the Claim, but Colorado Is Mostly Local for General Contractors

The key point is that Colorado does not have a single statewide general contractor license system like some states, but licensing still matters.

Colorado generally regulates contractor licensing through local city and county requirements for general contractors and through state licensing or registration for certain trades and regulated work, such as electrical and plumbing work. Many municipalities require contractor licenses, supervisor certificates, registrations, insurance, bonds, permits, or exams before work can be performed within that jurisdiction.

Unlike states with a statewide statute that expressly bars all unlicensed contractors from suing for compensation, Colorado's mechanics lien article does not contain a general statewide rule that automatically voids every lien because a general contractor lacked a local license. But that does not make licensing optional. A licensing violation can create permitting problems, municipal enforcement, contract defenses, penalties, inspection issues, and practical obstacles to proving or enforcing a payment claim. For regulated trades, failure to hold the required state or local credential can be more serious.

For lien claimants, the practical rule is simple. Confirm licensing, registration, trade credentials, permits, and local requirements before bidding and before starting work. A claimant should also confirm that the contracting entity named in the contract, invoices, notice of intent, lien statement, and foreclosure action is the same entity that performed the work and held any required credentials.

6. Suit to Enforce the Lien and Recorded Notice of the Action

The key point is that recording the lien statement is not the final step. Colorado requires both a timely lawsuit and a recorded notice that the lawsuit has been commenced.

Under C.R.S. § 38-22-110, the lien will not hold the property beyond the statutory 6 month period unless the claimant commences an action to enforce the lien within that time and records a notice stating that the action has been commenced in the office of the county clerk and recorder for the county where the property is located. This recorded notice is often handled like a lis pendens or notice of pending action, but the statute specifically requires a recorded notice of commencement of the lien action.

If multiple liens are recorded against the same property, one timely enforcement action and recorded notice may be sufficient if all lien claimants appearing of record are made parties as plaintiffs or defendants. Claimants should not rely on another party's lawsuit without confirming that they have been properly included and that the notice requirements are satisfied.

Because Colorado's enforcement deadline can run from last work, last materials, or completion as prescribed by statute, claimants should not wait until the end of the 6 month period. The foreclosure complaint, parties, property description, lien statement, notice of intent, affidavit of service, and recorded notice of action should be checked before filing.

Practical Takeaways for Colorado Contractors, Subcontractors, and Suppliers

The key point is that Colorado lien rights are broad, but the deadline and notice steps must be handled carefully.

• Serve the notice of intent to file a lien statement at least 10 days before recording the lien.
• Record the affidavit of service or mailing with the lien statement.
• Most claimants must record the lien statement within 4 months after their last labor, laborers, or materials are furnished.
• Day or piece labor claimants who do not furnish laborers or materials generally have a 2 month deadline after completion.
• The lien statement must include the required names, property description, amount due, signature, and verification.
• Lower-tier claimants may use the optional notice to owner or disburser to require withholding of funds.
• Public property generally cannot be liened. Check bond remedies on public projects.
• Materials, equipment, and services must be tied to the specific improvement.
• Confirm local contractor licensing, trade licensing, permits, and registration before work begins.
• File the foreclosure action and record the notice of commencement of action within the statutory 6 month period.

Disclaimer and Call to Action

This post provides general information about Colorado mechanics lien law and is not legal advice. Statutes, local licensing rules, notice requirements, exemptions, and dollar thresholds can change, and the correct answer often depends on the claimant's role, contract chain, project type, timing, local jurisdiction, and documents. Contractors, subcontractors, and suppliers should confirm current Colorado requirements and consult an attorney about specific lien rights and deadlines.

If you need help protecting payment rights on a Colorado project, contact National Lien & Bond for assistance with notices of intent, lien filings, bond claims, releases, and deadline tracking.