The call usually comes a week or two after a fight on a job site. A homeowner withheld payment on a remodel because the work was incomplete, defective, or unauthorized. The contractor left. And now a letter has arrived — sometimes a demand letter from a lawyer, sometimes a notice of intent to file a mechanics' lien, sometimes a small-claims filing — asking for thousands of dollars on a job where, the homeowner is fairly sure, nothing was ever signed.
The first question I usually hear is some version of: can he sue me if we never had a written contract? The short, honest answer is yes — and that answer surprises people. The longer answer is that a contractor can sue without a written contract, but the absence of a writing changes what the contractor has to prove, opens several defenses unique to Colorado, and limits the categories of damages available. The shape of the case is genuinely different from a written-contract case, and so is the defense.
I represent homeowners. I do not represent contractors. What follows is the framework I walk through when one of these letters lands on a homeowner's kitchen table.
Yes, a contractor can sue without a written contract — here is what it actually means
Colorado, like every American jurisdiction, recognizes oral contracts. If a contractor and a homeowner agreed on a scope and a price by handshake or by text message, and the contractor performed, the contractor can sue to enforce that agreement.
But "can sue" and "will win" are different sentences.
Without a written contract, the contractor's first hurdle is proving that the parties actually agreed on terms. The legal elements are familiar — offer, acceptance, consideration, mutual assent — but without a paper trail the proof has to come from somewhere. Text messages, voicemails, change-order discussions, photographs of the work as it progressed, payment records on earlier draws. Whatever the homeowner has of that history is evidence. Whatever the contractor has is evidence. The case becomes a credibility contest, and credibility contests are won and lost on the small details people forget to write down.
Quantum meruit and unjust enrichment — the contractor's fallback theories
When the contract claim is weak — because terms cannot be proved with sufficient clarity, or because the contractor knows the writing problem is fatal — Colorado contractors typically plead in the alternative under two equitable theories: quantum meruit and unjust enrichment.
Quantum meruit asks: regardless of any agreement, was the contractor's work worth something to the homeowner, and is it fair to make the homeowner pay the reasonable value of that work? Colorado courts generally measure the recovery by the reasonable value of services rendered, not the contractor's invoice or estimate. That distinction matters. A contractor's invoice may include a markup, overhead, profit, and rebill of subcontractor charges. A quantum meruit recovery is anchored to what the work was actually worth — which an expert (a general contractor not affiliated with the case) typically has to testify about.
Unjust enrichment is similar but asks whether the homeowner was enriched at the contractor's expense in a way that would be inequitable to retain. It is a residual theory, used when the case does not quite fit any other framework.
These theories have important implications for defense:
They give the contractor a path to some recovery even when the contract claim fails entirely. Homeowners should not over-rely on the "we never signed anything" point as a complete defense.
They limit the recovery to the reasonable value of work performed, not what the contractor wishes had been billed. If the contractor's bill is inflated relative to market rates, that gap is the homeowner's defense.
They require the contractor to prove the value of what was actually delivered, which means a homeowner with photographs and incomplete-work evidence can put pressure on the valuation.
The mechanics' lien track
Separate from a lawsuit, an unpaid contractor in Colorado can record a mechanics' lien against the property under the procedure at C.R.S. § 38-22-101 and the related sections. A lien does not require a written contract. It requires that the contractor performed work that improved the property, that statutory notice and timing requirements were met, and that the recorded statement complies with statutory form.
A lien is not a judgment — it is a recorded encumbrance that clouds title until released, paid, or judicially discharged. From the homeowner's standpoint the immediate practical implications are:
A lien generally has to be addressed before the property can be sold or refinanced.
Colorado law provides several procedural defenses, including the ability to demand that the contractor file suit on the lien within a defined window or have the lien extinguished, and the ability to bond around the lien to clear title while the dispute is pending.
An excessive lien — one recorded for an amount the contractor cannot substantiate — exposes the contractor to statutory penalties under Colorado law and to a claim by the homeowner.
The mechanics' lien process is procedurally technical and time-sensitive. If a lien has been recorded or noticed against your property, the deadlines start running immediately.
Defenses unique to Colorado
Several Colorado-specific defenses come up regularly in homeowner-side defense of these claims:
Licensing defects. Colorado has no statewide general-contractor license, but most Front Range municipalities require contractors to hold a local license for residential work. Whether a contractor's failure to hold the required local license is a complete bar to recovery depends on the municipality, the type of work, and the case law in that jurisdiction. It is one of the first questions to investigate, because in some cases the licensing defect ends the lawsuit.
Statute of frauds (real-property improvements). Colorado's statute of frauds at C.R.S. § 38-10-112 requires that certain agreements concerning real property be in writing. The application to home-improvement contracts is fact-specific and turns on the scope and nature of the work; not every job triggers the statute. Where it does, it can be dispositive.
Defective workmanship as a setoff or counterclaim. The single most common homeowner defense is that the work the contractor seeks to be paid for was incomplete, defective, or non-conforming. A homeowner who has paid for materials and labor that produced a leaking roof, a non-functioning HVAC system, or a re-tile that has to be torn out and redone has a setoff that can equal or exceed the contractor's claim. In Colorado, allegations of defective workmanship by the contractor as plaintiff are typically handled within the same lawsuit, often with the homeowner asserting counterclaims under contract, warranty, and (where the elements are met) the Colorado Consumer Protection Act at C.R.S. § 6-1-105.
Consumer-protection theories. Where the original deal was procured by misrepresentation — about licensing, about insurance, about the scope of the work, about the materials being installed — Colorado's CCPA may transform a defensive posture into an offensive one. The CCPA provides for treble damages and attorney-fee shifting in qualifying cases, which substantially changes the economics of a dispute when the elements are met.
Statute of limitations. Oral and implied contract claims in Colorado are subject to a three-year limitations period at C.R.S. § 13-80-101. If the contractor's claim is being raised long after the work or the alleged non-payment, the timing analysis is the first conversation to have.
What to do this week if you have just received a letter
Do not respond in writing until you have read the letter carefully. Anything you write in response to a demand will be exhibit A at trial. That includes text messages and emails. A short, professional acknowledgement that you have received the correspondence is fine. Detailed substantive replies should wait.
Gather everything. Every text, every email, every estimate, every change-order discussion, every photograph of the work, every payment record, every voicemail. Whatever exists about the relationship needs to be in one place before anything else happens.
Photograph the current condition of the work. If there is unfinished or defective work, document it now. Conditions on a construction site change. Defects that were obvious in week one are sometimes harder to prove in month six.
If a mechanics' lien has been recorded or noticed, treat the deadlines as real. Colorado mechanics' lien defenses are time-sensitive in a way the rest of the dispute is not.
Do not pay the disputed amount under pressure. A homeowner who pays a disputed invoice "to get this over with" often loses the leverage and the legal arguments that would have produced a much better outcome.
A short consultation is the right next step after those five. The call can usually tell you whether the contractor's claim looks substantive or pretextual, whether the licensing and limitations defenses are real, whether a mechanics' lien is in play and what the timing analysis looks like, and what realistic outcomes are. There is no charge for that initial conversation, and the analysis is yours regardless of whether we work together.
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