Check the License Before Money Changes Hands
The formal agency name “Contractors State License Board” belongs to California. Use CSLB’s free public search to verify a contractor license or Home Improvement Salesperson registration before signing, paying a deposit or allowing work to begin.
This guide shows which search field to use, how to read status, classification, bond, workers’ compensation and complaint information, and what to do when the business name, license number or project scope does not match.
Quick Answer
The official California contractor lookup is free. Search by contractor license number, business name, contractor or qualifier name, Home Improvement Salesperson registration number, or salesperson name.
A California contractor license number contains numbers only and can be up to eight digits. Finding a matching name is not enough—open the complete record and review status, classification, business identity, bond, workers’ compensation and complaint disclosure.
Choose the Correct CSLB Search Method
Use the strongest identifier available. A license-number search is usually fastest, but business, personnel and salesperson searches can reveal a record when the number is missing or questionable.
| Information you have | How to search | Useful CSLB search tip | Verify next |
|---|---|---|---|
| Contractor license number | Enter numbers only, with no alphabetic characters. | Do not exceed eight digits. | Status, business, classification, bond, workers’ compensation and disclosures. |
| Business name | Enter approximately the first 10–15 characters. | Try fewer letters and omit “The” or “A” at the beginning. | Make sure the official business matches the bid, contract, invoice and payment name. |
| Contractor or qualifier name | Use last name and first name. | Try only the last name when the complete name fails. | Confirm the person remains associated with the exact license offering the work. |
| Home Improvement Salesperson number | Use the numeric portion and the “SP” registration format. | The numeric portion can contain up to eight digits. | Confirm active registration and association with the licensed contractor. |
| Only an ad, vehicle or phone number | Ask for the legal business name and CSLB number in writing. | Do not rely on a badge, review profile or verbal claim. | Compare photo identification and the official business record before paying. |
Tool 1: CSLB Search Route Helper
Choose what information you have. The helper prepares a search method and search-ready versions of a printed license number. It does not query CSLB itself.
The Two-Minute Contractor License Check
Use this sequence before signing, paying a deposit or allowing anyone to start licensed construction work.
Collect the exact identifiers
Ask for the contractor license number, legal business name, classification and the name of the person who negotiated the contract.
Open the official CSLB database
Use the government search rather than a review site, paid directory, social profile or contractor-provided screenshot.
Confirm active status
Do not treat inactive, expired, suspended or cancelled status as a minor paperwork issue.
Match the business and classification
The company in the record should match the contract and the classification should cover the actual construction scope.
Review bond, workers’ compensation and disclosures
Open the full detail page instead of stopping at the first matching result.
Save and recheck the record
Save the result when signing, then search again before work begins and before releasing a major progress payment.
How to Read a CSLB License Record
An active label is important, but the business identity, classification, qualifier, bond and workers’ compensation information must also fit the project.
Lower concern
Active status, matching business, correct classification, current bond information and no unexplained disclosure issue.
Clarify first
Near expiration, unclear personnel, unfamiliar classification, exemption wording or complaint information that needs context.
Do not proceed
Inactive status, wrong business, wrong classification, cancelled bond, payment-name mismatch or false license claim.
| Record field | What it tells you | What to compare | Warning sign |
|---|---|---|---|
| License status | Active, inactive, expired, suspended, cancelled or otherwise restricted authority. | Check before signing and before work starts. | The license is not active for the project period. |
| Business information | Licensed business name, entity and address information. | Bid, contract, invoice, payment recipient and photo identification. | A different person or company asks for payment. |
| Classification | The construction work the license may perform. | Roofing, electrical, plumbing, HVAC, solar, general building or specialty scope. | The license does not cover the principal work. |
| Personnel and qualifier | People connected with and qualifying the license. | Confirm the responsible person remains associated with the business. | The qualifier is disassociated or under an unresolved change. |
| Contractor bond | Current and historical bond details. | Amount, effective date, cancellation history and exact license. | Cancelled or missing bond information. |
| Workers’ compensation | Policy, self-insurance or exemption information recorded with CSLB. | Ask who will work on the property and whether employees are used. | The record does not fit the actual workforce. |
| Complaint or legal disclosure | Public complaint, citation, accusation or disciplinary information. | Read the full dates, outcome and current status. | A serious disclosure is concealed or misrepresented. |
Tool 2: CSLB Result Review Checker
Complete this only after opening the contractor’s full official license-detail page.
When a California Contractor License Is Required
The under-$1,000 exemption is narrow. A license is required when the complete project reaches $1,000, when a building permit is required, or when employee labor or other workers are used.
$1,000 or more
Count labor, materials and all project items together. Splitting one project into smaller invoices does not create an exemption.
Permit required
A license can be required even below $1,000 when the project requires a building permit.
Workers are used
The small-project exemption does not apply when the unlicensed person uses employees or other workers.
What an unlicensed person cannot do
- Present themselves as a licensed contractor.
- Use a license number belonging to another business.
- Perform a permit-required project under the small-job exemption.
- Use employees or workers and still claim the exemption.
- Break one project into smaller agreements to remain below $1,000.
- Advertise without clearly stating that they are not licensed when the exemption applies.
Bond, Workers’ Compensation and Insurance
These records serve different purposes. Do not treat a contractor bond as general liability insurance or an insurance certificate as proof of an active CSLB license.
| Protection | Current California detail | What it does not prove | Homeowner action |
|---|---|---|---|
| Contractor license bond | $25,000 for an active contractor license or approved cash alternative. | It is not a per-project guarantee or general liability policy. | Review amount, effective date, cancellation history and business match. |
| LLC employee/worker bond | A licensed LLC generally needs an additional $100,000 bond. | It does not replace the ordinary contractor bond. | Confirm both bonds appear when the license entity is an LLC. |
| Workers’ compensation | Employers must maintain coverage; qualifying no-employee licensees may file an exemption. | An exemption does not mean workers can be used without coverage. | Ask who will perform the work and compare the answer with the record. |
| General liability insurance | Separate commercial coverage that may protect against certain property or injury claims. | It does not make an unlicensed contractor licensed. | Request current carrier and agency details and verify them independently. |
Contract, Deposit and Payment Checks
A correct license lookup reduces risk, but the written agreement and payment schedule still control much of the project.
Standard California down-payment limit
For a standard home-improvement or swimming-pool contract, the down payment generally cannot exceed $1,000 or 10% of the contract price, whichever is less. Special-order materials do not create a general exception. A properly filed blanket performance and payment bond can affect the rule.
Tool 3: Standard Down-Payment Cap Calculator
Enter the complete contract price. The result is a planning estimate under the standard rule and is not legal advice.
Contract items to confirm before signing
| Contract item | What it should explain |
|---|---|
| Licensed business | Legal business name, address and CSLB license number. |
| Project scope | Specific products, models, quantities, finishes, exclusions and who performs each trade. |
| Dates | Approximate start and completion dates and how delays will be handled. |
| Payment schedule | Payments tied to completed work or delivered materials without getting ahead of progress. |
| Permits | Who obtains permits, schedules inspections and corrects failed inspections. |
| Change orders | No price or scope change without a written agreement signed before extra work begins. |
| Subcontractors and lien protection | Who may be used, license details, preliminary notices and conditional or unconditional lien releases. |
Use the Licensing Authority Where the Work Will Happen
There is no single national Contractors State License Board. Other states use contractor boards, registrars, labor departments, professional licensing agencies or local city and county licensing.
Application, Renewal and License-Record Help
Application status is separate from the issued-license lookup. Use the application fee number and current processing-times page when a license has not yet been issued.
| Need | Best official route | Useful preparation |
|---|---|---|
| Original license application | CSLB applicant hub and original-license application. | Business entity, experience certification, classification and $450 application processing fee. |
| Application status | Application Fee Number status search. | Application fee number and PIN when required. |
| Current processing queue | Weekly processing-times page. | Know the document type and date it was submitted. |
| Renewal or reactivation | CSLB online services or current renewal form. | License number, bond, workers’ compensation, qualifier and entity records. |
| Add a classification | Additional-classification application process. | Experience, examination and classification-specific documentation. |
| Forms and current fees | CSLB Forms and Applications library. | Do not use an old saved PDF without checking the current version. |
File a Complaint or Report Unlicensed Activity
Choose the complaint route by contractor status and whether the project is active. A CSLB complaint may support investigation, mediation or discipline, but it does not guarantee repairs, restitution or a refund.
| Situation | Correct starting route | Evidence to collect |
|---|---|---|
| Dispute with a licensed contractor | Construction complaint against the licensed contractor. | Contract, changes, payments, photos, permits, messages and license record. |
| Unlicensed contractor dispute | Complaint against an unlicensed contractor. | Identity, advertisement, job address, price, payment proof and communications. |
| Active unlicensed project | Active-project lead referral or SWIFT report. | Current address, safe photos, vehicle details, workers and advertisement. |
| Illegal advertising | Advertising complaint. | Screenshot, URL, flyer, phone number, license claim and date seen. |
| Failure to obtain a permit | Building Permit Violation Referral and local building department. | Project address, contract, work performed and permit-search result. |
| Salesperson concern | Verify the HIS registration and contractor relationship, then use the relevant complaint route. | Sales documents, HIS name, number, messages and contractor details. |
Prepare these items before starting the complaint
- Signed contract, estimate and written change orders.
- Invoices, receipts, cancelled checks and payment records.
- Official license search result and date checked.
- Dated photographs and videos.
- Permit and inspection documents.
- Advertisements and screenshots showing the license claim.
- Emails, texts and written correction requests.
- A short dated timeline of what happened.
Call CSLB With the Right Information Ready
The Public Information Center can help consumers, applicants and license holders interpret status, application and licensing information.
Inside California
Outside California
Staffed hours
Monday–Friday, 8:00 a.m.–5:00 p.m. Pacific, excluding state holidays.
Have these details ready
- Contractor license number or application fee number.
- Exact legal business and person names.
- Project address and type of work.
- Classification shown in the official record.
- Bond or workers’ compensation question.
- Exact status or disclosure wording shown online.
- Dates and names of forms or documents involved.
Common License Lookup Mistakes
Most failed searches and unsafe hiring decisions come from identity, classification or payment mistakes rather than from the search tool itself.
Trusting a printed number
A number on a truck, estimate or website can be copied or belong to another company.
Stopping at a matching name
Open the complete record and review status, classifications, bond and disclosures.
Ignoring payment identity
The requested payment name should not be unrelated to the licensed business.
Assuming “B” covers everything
General building and specialty classification limits still matter for the proposed work.
Skipping the HIS check
Verify the salesperson registration and its connection with the licensed contractor.
Paying ahead of progress
Do not allow deposits or progress payments to get ahead of lawful limits and completed work.
Contractors State License Board Lookup FAQs
What is the official California contractor license lookup website?
The official search is the CSLB Check a Contractor License or Home Improvement Salesperson Registration page on cslb.ca.gov.
Is the California CSLB license search free?
Yes. The official CSLB contractor license and Home Improvement Salesperson registration search is free and does not require payment to view a public record.
Can I search a California contractor by business name?
Yes. Enter approximately the first 10–15 characters of the legal business name. Try fewer letters, omit “The” or “A” at the beginning, or search the contractor or qualifier name if no result appears.
Can a California contractor license number contain letters?
No. CSLB states that a contractor license number contains no alphabetic characters and should not exceed eight digits. Home Improvement Salesperson registrations use a different format that includes “SP.”
When is a California contractor license required?
A current license is required when the complete project is valued at $1,000 or more, requires a building permit, or uses employee labor or other workers.
How much is the California contractor license bond?
The ordinary contractor license bond is $25,000. A licensed limited liability company generally needs an additional $100,000 employee or worker bond.
Does every California contractor need workers’ compensation insurance?
Employers must carry workers’ compensation insurance. Qualifying no-employee licensees may file an exemption, except classifications that must maintain coverage or valid self-insurance even when no employees are reported.
How much can a California contractor request as a down payment?
For a standard home-improvement or swimming-pool contract, the down payment generally cannot exceed $1,000 or 10% of the total contract price, whichever is less.
Can I file a complaint against a California contractor?
Yes. CSLB provides complaint routes for licensed contractors, unlicensed contractors, active unlicensed projects, illegal advertising and permit concerns. Preserve the contract, payments, photos, messages and license details.
What should I use if the project is outside California?
Use the official contractor licensing authority for the state where the work will happen, then check city, county and trade-specific requirements because there is no single national Contractors State License Board.
Verify the Record Before You Sign
Search the exact contractor, compare the official business with the contract and payment name, confirm active status and classification, review bond and workers’ compensation information, and save the result.
When the identity, status, classification or payment request does not match, pause and contact CSLB before money changes hands.