How Colorado mechanics lien deadlines work
Colorado’s mechanics lien law (Title 38, Article 22 of the Colorado Revised Statutes) gives contractors, subcontractors, suppliers, and laborers a powerful tool to secure payment — but only if you hit a short series of strict deadlines. Miss one and the lien can evaporate, along with your leverage to get paid. The dates this tool shows are estimates to verify with a Colorado attorney, not a guarantee of your specific deadline.
Step 1: Serve a Notice of Intent (at least 10 days first)
Before you can record a lien, you must serve a written Notice of Intent to Lien on the property owner (or reputed owner) and the principal contractor at least 10 days before you file your lien statement (C.R.S. § 38-22-109(3)). Serve it by personal delivery or by registered/certified mail with return receipt requested, and keep the affidavit of service to file alongside the lien. Because the notice has to land 10 days ahead, it effectively moves your real first deadline earlier than the recording date.
Step 2: Record your lien statement
When you record depends on who you are. General contractors, subcontractors, and suppliers who furnish labor and/or materials generally have 4 months after their last labor or materials on the project to record the lien statement (C.R.S. § 38-22-109(5)). A pure day or piece laborer — someone who supplies only labor, no materials — instead has 2 months after the project is completed (C.R.S. § 38-22-109(4)). The clock runs from the last day you actually performed work or delivered materials, not from invoices, phone calls, punch-list paperwork, or warranty visits.
Step 3: The residential 2-month rule
On a single- or two-family dwelling there is a trap for the unwary. A lien recorded more than 2 months after completion generally will not bind a bona fide purchaser for value who buys the home — unless the buyer had actual knowledge, the lien was recorded before the sale, or you filed a notice under § 38-22-109(10) within one month after completion (C.R.S. § 38-22-125). Day laborers are excepted from this rule. To stay safe on residential work, this tool treats two months from completion as the practical mark for those projects.
When is the project “complete”?
“Completion” ignores trivial punch-list imperfections, and discontinuing all work and deliveries for three months is itself deemed completion (C.R.S. § 38-22-109(7)). Because completion can arrive sooner than you expect — and because we may not know your exact completion date — the calculator leans toward the earliest defensible date so you act in time.
Step 4: Enforce the lien within 6 months
Recording is not the finish line. You must file a lawsuit to foreclose the lien, and record a notice that the action has begun (a lis pendens), within 6 months — measured from the later of project completion or your last work or materials (C.R.S. § 38-22-110). If you let that window close, the lien expires and your security is gone.
Costly mistakes to avoid
- Inflated amounts. Knowingly claiming more than you are owed can forfeit your entire lien and make you liable for the other side’s costs and attorney fees (C.R.S. § 38-22-128).
- Groundless or false documents. Recording a groundless lien exposes you to the owner for at least $1,000 (or actual damages, whichever is greater) plus attorney fees (C.R.S. § 38-35-109(3)).
- Unverified statements. Your lien statement must be signed and sworn (verified) before it is recorded (C.R.S. § 38-22-109).
- Wrong trigger date. Counting from an invoice or a callback visit instead of your true last day of labor or delivery can blow the deadline entirely.
- Assuming weekend roll-forward. Do not assume a deadline that lands on a weekend or holiday rolls to the next business day — confirm the exact date with an attorney.
Every output of this calculator is an estimate to confirm with a licensed Colorado attorney and to verify against the current text of C.R.S. § 38-22-109. Lien rights are valuable and the deadlines are unforgiving — when real money is on the line, get a professional to check your dates.