Can a subcontractor file a lien without a written contract in California?
Last reviewed July 5, 2026
Yes, a subcontractor in California can file a lien without a written contract, but they must provide proof of the work performed and the value of that work. Oral contracts are valid in California, but it's best to have something in writing to avoid disputes.
Key points
- Subcontractors can lien without a written contract.
- Proof of work and value must be shown.
- Oral contracts are valid but risky.
In California, even if there's no written contract, a subcontractor can still file a mechanics lien if they can substantiate the work done. This includes providing evidence like invoices, correspondence, or witness statements. Having a written agreement is always preferred to mitigate any potential issues down the line.
How Alloovium helps
Alloovium helps track contract documents and obligations, making it easier to manage compliance and avoid lien disputes.
See how it worksRelated questions
- Do I need to send a preliminary notice before filing a lien in California?
- How long does a mechanics lien last in California?
- How much retainage can be withheld on a construction project in California?
- What are the prompt payment rules for construction in California?
- What is the deadline to file a mechanics lien in California?
- What is the difference between a conditional and unconditional lien waiver in California?
General information for US construction professionals — not legal advice. Lien deadlines, retainage caps and notice rules vary by state; verify with the state statute or a construction attorney.