Unlicensed Solar Contractor? You May Owe $0 — The CA B&P 7031 Guide

Two minutes on the California Contractors State License Board website may be the most valuable two minutes you ever spend.

If you are a California homeowner with a solar contract, and your installer's contractor license was expired, suspended, pending, or simply not held in the right classification for even a single day during your installation, the entire contract is unenforceable. You do not owe any remaining balance. You can recover every dollar you have already paid. Any UCC-1 fixture filing, any mechanic's lien, any security interest tied to the contract is void.

This is not legal hyperbole. It is California Business and Professions Code Section 7031, the most powerful consumer protection statute in the entire residential solar legal arsenal. The California Supreme Court has called it the law that "severely restricts the remedies available to unlicensed contractors." Other courts have called it both a "shield" and a "sword." It applies even when the work was satisfactory. It applies even when the homeowner knew the contractor was unlicensed. It applies even when the result feels harsh and unfair.

Stick with me. I'll walk you through exactly what the statute says, exactly how to check your installer's license history, exactly what triggers the rule, and exactly what to do if your installer's license was invalid at any point during your install — including how to combine this with the FTC Holder Rule to also wipe out the loan with the lender.

What the Statute Actually Says

California Business and Professions Code Section 7031 is short and brutal. Three subdivisions matter most. From the official statute:

(a) Except as provided in subdivision (e), no person engaged in the business or acting in the capacity of a contractor, may bring or maintain any action, or recover in law or equity in any action, in any court of this state for the collection of compensation for the performance of any act or contract where a license is required by this chapter without alleging that they were a duly licensed contractor at all times during the performance of that act or contract regardless of the merits of the cause of action brought by the person…

(b) Except as provided in subdivision (e), a person who utilizes the services of an unlicensed contractor may bring an action in any court of competent jurisdiction in this state to recover all compensation paid to the unlicensed contractor for performance of any act or contract.

(c) A security interest taken to secure any payment for the performance of any act or contract for which a license is required by this chapter is unenforceable if the person performing the act or contract was not a duly licensed contractor at all times during the performance of the act or contract.

Three independent consequences flow from the same trigger:

1. The unlicensed contractor cannot sue you. If they file to collect, they lose. Subdivision (a) bars them from bringing or maintaining any action for compensation. The California Supreme Court in MW Erectors, Inc. v. Niederhauser Ornamental & Metal Works Co., Inc. (2005) 36 Cal.4th 412, 435 confirmed this is absolute: the statute "prevents unlicensed entities from recovering compensation regardless of the balance of the equities or the manner in which the claim is framed."

2. You can claw back what you paid. Subdivision (b) gives you an affirmative right of action to recover all compensation already paid. Not a portion. All of it. California courts have consistently held this even when the work was satisfactory and even when the homeowner knew about the licensing issue. The statute treats licensing compliance as so important that it overrides ordinary equity.

3. The security interest is void. Subdivision (c) makes any UCC-1 fixture filing on the equipment, any mechanic's lien on the property, any recorded instrument tied to the contract — unenforceable. This matters enormously for home sales, for refinancing, and for clearing title.

What License Solar Installers Need in California

Solar installation in California requires one of two contractor classifications:

C-46 — Solar Contractor. The dedicated solar classification. Covers photovoltaic system installation, solar thermal, and integrated solar electric and storage systems. This is the cleanest license for residential solar installs.

C-10 — Electrical Contractor. The electrical contractor license, which covers the electrical wiring portions of solar work. Many installers operate under C-10 rather than C-46, especially older companies that built solar capabilities on top of existing electrical operations.

Some installations may also implicate B (General Building) or other classifications when significant roof, structural, or HVAC integration work is involved. But for a standard residential PV installation, the relevant licenses are C-46 or C-10.

The license must be:

• Valid — not expired, not suspended, not revoked
• Active — not in inactive status, not pending
• In the right classification — C-46 or C-10 for residential solar work
• Held by the entity that signed your contract — not by an affiliate or sister company
• Continuously valid for the entire duration of the work — Section 7031 explicitly requires "duly licensed contractor at all times during the performance of that act or contract"

Any one of these requirements failing — for any portion of the install period — triggers the statute.

How to Check Your Installer's License History

The CSLB records are the official record. They are admissible. They are timestamped. They are what your case will be built on.

What "All Times During the Performance" Actually Means

This is where it gets interesting, and where many installers have been caught.

"Performance of the act or contract" includes the entire scope of work — sales, design, permitting, installation, inspection, interconnection. Not just the day the panels went on the roof. If the installer's license was invalid during any of those phases, the statute applies.

Common patterns that have triggered Section 7031:

• License lapsed during a long install timeline — installer signed contract in March, license expired in May during permitting delays, work resumed in July after lapse was cured. The contract is unenforceable.
• License was in pending status at signing — installer had applied for renewal but had not yet received it. Pending is not "duly licensed."
• Wrong classification during sales — sales rep operated under a C-10 license but the contract scope required C-46.
• License held by parent, not subsidiary — contract signed by "ABC Solar of California, LLC" but the license was held by "ABC Solar Holdings, Inc." Different legal entities. License does not transfer.
• License was suspended for a CSLB enforcement action — installer was under investigation for prior consumer complaints, license was administratively suspended for some period. Even a 30-day suspension during a 6-month install triggers the statute.

The Substantial Compliance Exception (and When It Does NOT Apply)

Subdivision (d) of Section 7031 includes a narrow "substantial compliance" exception. A court may find substantial compliance with licensing requirements if the contractor (1) had been duly licensed before the work, (2) acted reasonably and in good faith to maintain proper licensure, and (3) acted promptly and in good faith to remedy the failure upon learning of it.

This exception exists for the contractor who genuinely tried to renew on time but was caught by an administrative delay — not for the contractor who let the license lapse through neglect or who never held the right classification in the first place.

Critically, subdivision (e) bars the substantial compliance exception entirely "where the person who engaged in the business or acted in the capacity of a contractor has never been a duly licensed contractor in this state." If the entity that signed your contract never had a California contractor license, substantial compliance is not available — the contract is unenforceable, period.

How to Stack Section 7031 With the FTC Holder Rule

Section 7031 attacks the contract with the installer. But your loan is with the lender — GoodLeap, Mosaic, Sunlight Financial, Dividend, or Service Finance. The contract being unenforceable does not automatically wipe out the loan.

This is where the FTC Holder Rule (16 C.F.R. § 433.2) becomes critical. Under the Holder Rule, the lender is liable for the seller's misconduct. An installer operating without a valid license while collecting payment is misconduct — both as a violation of California licensing law and as a misrepresentation about the installer's qualifications and authority. (Read the complete FTC Holder Rule breakdown.)

Stacking the two claims:

1. Section 7031 claim against the installer — recover compensation paid + void any installer-held security interest
2. FTC Holder Rule claim against the lender — assert the installer's misconduct (operating without license + misrepresenting authority to contract) against the lender; lender becomes liable for the misrepresentation
3. California CLRA + UCL claims — Cal. Civ. Code §§ 1750-1784 (CLRA) and Bus. & Prof. § 17200 (UCL) reach the same conduct under California consumer protection law, with separate remedies including injunctive relief and attorney's fees

This stack is what produces full loan cancellation. The 7031 claim establishes the misconduct. The Holder Rule routes the misconduct to the lender. The state UDAP claims add fee shifting and additional damages. Together, the typical outcome is: loan canceled, equipment retained, attorney's fees paid by the lender.

Similar Statutes in Other States

California's Section 7031 is the most powerful unlicensed-contractor bar in the country, but other states have similar statutes that can produce equivalent results:

• Texas: Texas Occupations Code §§ 1302 (electricians) and 1303 (residential AC/HVAC). Solar work touching electrical or roofing typically requires Texas Department of Licensing and Regulation registration. Unregistered work creates UDAP exposure.
• Florida: Florida Statutes § 489.128 — contracts with unlicensed contractors are unenforceable, similar to California.
• Nevada: NRS 624.320 — Nevada State Contractors Board licensing required; unlicensed contractor cannot collect.
• Arizona: A.R.S. § 32-1153 — Arizona Registrar of Contractors licensing required; unlicensed contractor barred from collecting.

The mechanics vary state to state. But the principle — that contractor licensing is so important that unlicensed work cannot be enforced — exists in some form in nearly every state. If you are not in California, check your state's contractor licensing statute. The CSLB-equivalent agency in your state will have a license lookup similar to California's.

What If the License Was Valid? Other Options

Section 7031 does not apply if the installer's license was valid throughout your install period. But that does not mean you have no options. The 14 other legal loopholes documented in our pillar guide apply regardless of license status. The most powerful for California homeowners with valid-license installers:

• FTC Holder Rule attack on the lender for the installer's misrepresentations
• CLRA + UCL for any deceptive sales conduct (the zero-bill promise, tax credit misrepresentation, production projections that did not materialize)
• Hidden dealer fee attack — most California solar loans through GoodLeap, Mosaic, Sunlight have 10-36% dealer fees that may be challengeable as TILA disclosure violations (read the dealer fee breakdown)
• Common-law fraudulent inducement backup theory
• California Civil Code §§ 1689.5-1689.14 — California's enhanced cooling-off period and home solicitation sales protections
• California Welfare & Institutions Code § 15610.30 — elder financial abuse statute, double or treble damages for homeowners 65+

So even if Section 7031 does not apply, the California legal arsenal still has multiple paths to cancellation.

Here Is What Actually Happens When We Take Your Case

We are not a referral mill. We review every case before we take it. If you meet the criteria — and most homeowners reading an article like this one do — here is what typically happens:

Outcome #1: Your contract gets completely canceled. You keep the system.

Read that again. That $30,000 loan, that $80,000 loan, that $150,000 loan — gone. Wiped. And the equipment on your roof? You keep it. It is yours. Hire a local electrician or solar tech to clean it up and tie it in properly, and you have got a functioning solar system for the cost of a service call.

Not a typo. That is the best-case outcome, and it is what we push for on every case we accept.

Outcome #2: Your loan gets massively reduced. Typically 40% to 60%.

Every case is different, but the pattern is consistent:

• A $150,000 loan knocked down to around $75,000
• A $70,000 loan cut to $35,000
• A $175,000 loan restructured to something you can actually live with

If we cannot completely kill the contract, we fight like hell to get the principal slashed — and we have a track record of doing it.

If we take your case and cannot deliver either outcome?

You get 40% of your fee back after we have exhausted every angle. That is our guarantee, in writing. Nobody else in this space puts that on paper. We do — because we only take cases we believe in.

The Bottom Line

If you are a California homeowner with a solar contract, the very first thing to check — before pulling your loan documents, before reviewing your sales materials, before doing anything else — is your installer's CSLB license history.

The check takes two minutes. The records are public, free, and authoritative. Any license gap, any wrong classification, any pending or suspended status that overlapped with your install opens up the most powerful contract attack in California consumer protection law.

Section 7031 was written to protect homeowners from contractors who circumvent the licensing system that exists for their safety. The California Supreme Court has been emphatic about its application. The remedy is full claw-back, security interest void, and contract unenforceable. Combined with the FTC Holder Rule attack on the lender, the typical outcome is total loan cancellation with the equipment retained.

The equipment was never the problem. The licensing was the gatekeeper. If the gatekeeper was not in place, the law is on your side in a way that few other consumer protection statutes match.

Related Reading

• 14 Legal Loopholes That Can Kill a Solar Contract
• FTC Holder Rule Explained — The Federal Law That Makes Your Lender Pay
• The Hidden Dealer Fee — How Lenders Added 30% to Your Loan
• Is the Sunrun Solar Lease Predatory?
• Sunrun PPA & Lease Buyout Calculator
• Momentum Solar Complaints 2026
• How to Cancel a Freedom Forever Contract After Bankruptcy
• GoodLeap Solar Loan Complaints — Complete Guide