Most of the mechanic's lien problems I see in Colorado are not close calls. They are unforced errors — procedural mistakes that defeat an otherwise valid claim before anyone reaches the merits. The lien statute, C.R.S. § 38-22-101 et seq., gives contractors and suppliers a powerful remedy, but it is also a strict-compliance statute. Miss a step and the lien fails, even when the underlying debt is real and the work was done well.
Here are the four mistakes that cost contractors and subcontractors their lien rights more often than any others, and the rule that prevents each one.
Mistake 1: Skipping or mistiming the ten-day notice of intent
Under C.R.S. § 38-22-109(3), the lien claimant cannot record anything with the county clerk until two parties have been formally notified at least ten clear days in advance: the property owner and the contractor at the top of the contracting chain (in subcontractor cases, the prime). Notification must be by personal service or certified mail with return receipt, and proof of service must be filed alongside the eventual lien statement.
Where I see this fail:
The claimant counts the ten days inclusively rather than waiting ten full days after the recipient signed for the mailing
A subcontractor notifies the owner but forgets the prime — both are required
The claimant uses ordinary mail because it is cheaper and faster, which does not satisfy the statute
The lien is recorded the same week the notice goes out, with no proof-of-service affidavit attached
Any one of those gets the lien struck on a motion to release. The cure is simple but uncompromising: send certified mail to both required parties, wait the full ten days from the date of service, then record.
Mistake 2: Misreading which filing deadline applies
Two filing windows exist, and which one applies depends on what kind of claimant is filing:
A shorter, two-month window under § 38-22-109(4) for individual tradespeople who bill purely for their own time — typically per-diem or piecework labor with no crew and no materials of the claimant's own.
A four-month window under § 38-22-109(5) for everyone else. Most contractors, all subcontractors who run crews or supply materials, and all material suppliers fall here.
The broad rule catches most cases; the narrow rule catches the people who do not realize they are in it. A solo tradesman billing day-rate for his own hours is in the shorter window even though he might never describe himself that way.
The more dangerous trap is not which window applies, but when it starts. The clock does not run from substantial completion of the project, from the owner's certificate of occupancy, or from the day the punch list closes. It runs from the claimant's own last presence on the job — the last invoice for actual time on site or the last shipment of materials. A subcontractor who finished his work in March and watched the GC close out the project in May has a March-anchored deadline, and getting that date wrong is fatal to the lien.
The cure: keep a contemporaneous log of the last date you were actually on site or shipped material, and calendar the deadline from that date the same day you finish.
Mistake 3: Defective lien statement content
C.R.S. § 38-22-109(1) requires the lien statement to contain four specific items. They look simple in the statute and are surprisingly easy to bungle in practice:
The name of the owner or reputed owner of the property — meaning the legal owner of record, not the person who hired you. If the owner is an LLC and you list the spouse or the property manager, the lien is defective.
The name of the lien claimant; the name of the person who furnished the labor or materials; and the name of the contractor when the lien is claimed by a subcontractor — three names, all three of which must be correct.
A description of the property sufficient to identify it. A street address alone is usually treated as adequate, but the legal description is safer and is what I prepare in every case I draft.
A statement of the amount due or owing.
The statement must be signed and sworn to under penalty of perjury, per subsection (2). The most common defects I see are: wrong owner of record (especially after a sale during the project); inflated or undocumented amounts in subsection (d); and missing or improper notarization.
Subsection (6) does permit a corrective amended statement within the original deadline window — but only within that window. If you discover the defect after four months have run, the amendment is unavailable. Catch it early or not at all.
Mistake 4: Filing the lien and then sitting on it
The lien statement is not the end of the process. It is the beginning of one.
C.R.S. § 38-22-110 imposes a second clock that begins the moment the statement is recorded — really, the moment the underlying labor-or-materials clock started. The claimant has half a year to take two additional actions: file a foreclosure complaint in district court, and record a separate notice with the county clerk telling the world that the foreclosure has been filed. Both actions are required. Missing either one collapses the lien.
This is the step I see contractors miss most when they try to handle a lien without counsel. They record the statement, send a demand letter, get into back-and-forth negotiations with the owner's attorney, and let the six-month window close while still in settlement discussions. When it closes, the lien is dead, the leverage that drove the negotiation is gone, and the claimant is back to a plain contract claim with none of the title-cloud pressure that made the settlement conversation possible.
A related trap, much less common but worth knowing about, is § 38-22-109(8): if the project has not yet been completed at the twelve-month mark after the lien was recorded, the claimant must file a sworn affidavit confirming incomplete status within thirty days of the anniversary. The provision rarely matters because most lien matters resolve well inside twelve months, but it does control on long phased construction.
The cure for this category of mistake is the same in every case: the moment the lien statement is recorded, calendar both the six-month foreclosure deadline and any one-year anniversary, and treat them as hard.
The rule of thumb
In my experience, lien failure almost always traces to one of two things: a deadline missed because the trigger date was misunderstood, or a procedural step (the ten-day notice, the recorded notice of commencement) skipped because the claimant thought it was a formality. The substantive lien rights in Title 38, Article 22 are generous to contractors and suppliers. The procedural rules are not. They are read strictly against the claimant in every Colorado case I have litigated.
If you remember nothing else from this article, remember the three numbers and pair each with what it triggers:
10 days — minimum interval between notice of intent and recording of the lien statement
2 or 4 months — deadline for recording, measured from your last labor or materials
6 months — deadline to file the foreclosure action and record the notice of commencement
Calendar those three dates the first time you bill on a project. Most of the lien problems I see disappear the moment the contractor or supplier does that one thing.
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