Colorado • Mechanics Lien Deadlines
Colorado Mechanics Lien Deadline Calculator
Learn the exact preliminary notice and lien filing deadlines in Colorado. Then jump into the LienDeadline calculator to see your real project dates in 0.3 seconds.
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Colorado Lien Deadline Overview
Preliminary Notice Deadline
Must serve notice at least 10 days before filing lien
Mechanics Lien Filing Deadline
4 months after last furnishing labor or materials
Typical Projects
Building material suppliers, lumber yards, concrete and rebar suppliers working on private construction projects in Colorado.
This page is a simplified summary for material suppliers and does not replace advice from a construction attorney.
How lien deadlines work in Colorado
In Colorado, material suppliers must follow specific deadlines to protect their lien rights. The preliminary notice deadline is must serve notice at least 10 days before filing lien. The mechanics lien filing deadline is 4 months after last furnishing labor or materials. Missing either deadline results in complete loss of lien rights for that project.
Preliminary notice rules
- Must serve Notice of Intent at least 10 days BEFORE filing lien
- Must serve notice at least 10 days before filing lien
- Notice of Intent to Lien required for material suppliers
Mechanics lien filing rules
- Must serve Notice of Intent at least 10 days BEFORE filing lien
- Lien must be filed within 4 months of last furnishing
- 4 months after last furnishing labor or materials
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Frequently asked questions
What is the mechanics lien deadline in Colorado?
4 months after last furnishing labor or materials
Does Colorado require a preliminary notice?
Must serve notice at least 10 days before filing lien
What happens if I miss the deadline?
You lose your legal right to file a lien for that project, even if you're still owed money. That's why many suppliers use automated deadline tools instead of spreadsheets.