Unlicensed contractors have no lien rights
Bus. & Prof. Code § 7031 is the harshest rule in California construction: no license, no lien, no lawsuit — and possibly a full refund of what you were already paid.
Everything on this site — preliminary notices, mechanics liens, stop notices, bond claims — rests on one prerequisite: a valid CSLB license, held at all times during the work. Business & Professions Code § 7031 strips an unlicensed contractor of every payment remedy, no matter how good the work or how real the debt.
What § 7031 does
- No collection lawsuit— a contractor unlicensed at any point during performance can’t sue for compensation (§ 7031(a)).
- No lien, stop notice, or bond claim — those remedies are enforced through the courts, so the bar reaches them too.
- Disgorgement — the hiring party can sue to claw back everything already paid (§ 7031(b)). Courts apply this strictly, even where the work was flawless.
The mid-job lapse trap
“At all times” means exactly that. A license that lapses for two weeks mid-project — a missed renewal payment, a suspension for an expired contractor’s bond — can void recovery for the entire contract. The substantial-compliance safety valve (§ 7031(e)) is deliberately narrow: it generally requires that you were licensed before the job, didn’t know about the lapse, and fixed it promptly. Don’t plan on it. Treat your renewal date with the same respect as a lien deadline.
Practical rules for subs
- Keep the license current— renewal, bond, and workers’ comp on autopay/auto-reminder. A $200 renewal protecting a $200,000 year is the best-priced insurance in the industry.
- Match the classification to the work — performing work outside your classification raises the same § 7031 risks.
- Check who you work for and with— an unlicensed GC or sub-sub in the chain is a red flag for the whole job’s payment hygiene. Verify licenses free at cslb.ca.gov.
Licensed? Then protect the rights you have.
If your license is in order, § 7031 is your competitors’ problem, not yours — and the standard playbook applies: preliminary notice within 20 days, deadline tracking, and a lien if payment stalls.
Frequently asked questions
Related guides
Licensed and unpaid? Use your rights.
Notice Harbor files your preliminary notices, tracks every deadline, and records your lien when it comes to that. Your first notice is free.
Start your free noticeThis page is general information, not legal advice, and does not create an attorney–client relationship. California lien and notice deadlines are strict and fact-specific — “completion” alone can be triggered by actual completion, the owner’s occupancy or use, or a 60-day cessation of labor. Notice Harbor is not a law firm. Confirm any deadline that matters to your claim with a licensed California construction attorney.