How to File a CSLB Complaint Against a Contractor
When a licensed contractor abandons a job, performs defective work, or violates the terms of a contract, California homeowners can file a formal complaint with the Contractors State License Board (CSLB). The CSLB investigates complaints, mediates disputes, and has the authority to discipline or suspend a contractor’s license.
This guide covers when the CSLB can help, what to document before filing, how the complaint process works, and what to do if the CSLB process does not resolve your dispute.
When the CSLB Has Jurisdiction
The CSLB handles complaints against both licensed and unlicensed contractors performing work that requires a license. But there are time limits. You must file within four years of the date you discovered the issue. For latent defects—problems hidden inside walls, under foundations, or otherwise not visible during normal inspection—the deadline extends to ten years from the date of project completion.
The CSLB does not handle every type of dispute. Contract disagreements over price, scheduling, or design preferences are generally outside CSLB jurisdiction. The board focuses on licensing violations, code violations, abandonment, and financial harm caused by a contractor’s failure to perform.
What to Document Before Filing
A strong complaint starts with documentation. Before filing, gather the following:
- The signed contract, including any change orders.
- All payment records: checks, credit card statements, receipts, Venmo or Zelle confirmations.
- Written communications: texts, emails, letters.
- Photos of defective or incomplete work, dated if possible.
- Any inspection reports, permits, or building department correspondence.
- The contractor’s license number, business name, and any business cards or advertisements.
If you do not have the contractor’s license number, you can look it up before filing.
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How to File a CSLB Complaint
The CSLB accepts complaints through its online complaint form. You can also request a paper form by calling 800-321-CSLB (2752). There is no fee to file.
The form asks for the contractor’s information, a description of the problem, the amount of financial loss, and supporting documents. Be specific and factual. State what was agreed to, what was delivered, and how much money is at stake. Avoid emotional language. The investigator reading your complaint needs facts, not opinions.
What Happens After You File
The CSLB assigns a Consumer Services Representative (CSR) to your case. The CSR reviews the complaint and contacts both parties. In many cases, the first step is mediation—an attempt to reach a voluntary settlement without formal proceedings.
If mediation fails, the CSLB may assign an Enforcement Representative to investigate. Investigations can include site inspections, document review, and interviews with both parties. The CSLB has the authority to issue citations, levy fines, and refer cases for formal disciplinary action.
Arbitration Programs
The CSLB runs two arbitration programs for financial disputes:
- Mandatory arbitration applies to disputes under $15,000. If the CSLB determines that arbitration is appropriate, both parties must participate. The arbitrator’s decision is binding.
- Voluntary arbitration covers disputes between $15,000 and $50,000. Both the homeowner and the contractor must agree to participate. If either party declines, the case proceeds through other channels.
For disputes over $50,000, the CSLB does not offer arbitration. You will need to pursue the matter through civil court.
Set Realistic Expectations
The CSLB can discipline a contractor’s license, but it does not guarantee that you will get your money back. The board’s primary role is consumer protection through licensing enforcement, not debt collection.
If the CSLB finds a violation, possible outcomes include a letter of correction, a citation with a fine payable to the state, license suspension, or license revocation. These actions protect future consumers but may not directly compensate you for your loss.
Filing a Bond Claim
If a licensed contractor has caused you financial harm, you may be able to file a claim against the contractor’s $25,000 license bond. This is a separate process from the CSLB complaint.
The bond is held by a surety company, not by the CSLB. To file a claim, you need to identify the surety company listed on the contractor’s license record, then contact the surety directly with your claim and supporting documentation. The surety investigates the claim and decides whether to pay.
Bond claims are limited to $25,000 total across all claimants. If multiple homeowners or subcontractors file claims against the same bond, the available funds may be divided. For more on how bonds work, see our bond and insurance guide.
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Small Claims Court
If you need to recover money, small claims court is often the most practical path. California small claims court handles cases up to $12,500 for individuals. You do not need an attorney, and the filing fee is modest (typically $30 to $75 depending on the amount claimed).
Small claims court is independent of the CSLB process. You can file a CSLB complaint and a small claims case simultaneously. A CSLB citation or finding of violation can support your small claims case, but the two processes operate separately.
License Suspension for Unpaid Judgments
If you win a court judgment against a licensed contractor and the contractor does not pay, you can report the unpaid judgment to the CSLB. Under Business and Professions Code Section 7071.17, the CSLB will suspend the contractor’s license until the judgment is satisfied. This is one of the most effective enforcement tools available to homeowners, because most contractors cannot afford to lose their license.
Complaints Against Unlicensed Contractors
The CSLB also accepts complaints against unlicensed individuals performing work that requires a license. The CSLB can issue stop-work orders and refer cases for criminal prosecution. However, there is no bond to claim against an unlicensed contractor, and collecting a judgment is often difficult. For more on this situation, see our guide on what to do if your contractor is unlicensed.
Key Deadlines Summary
- General complaints: file within 4 years of discovering the problem.
- Latent defects: file within 10 years of project completion.
- Mandatory arbitration: disputes under $15,000.
- Voluntary arbitration: disputes $15,000 to $50,000.
- Small claims court limit: $12,500 for individuals.
Before filing a complaint, verify the contractor’s current license status. An active license means the CSLB has more enforcement tools available. Use our license verification guide to check status, bond, and disciplinary history. You should also review California’s home improvement contract requirements to determine whether the contract itself met legal standards.