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Investigate Your Contractor

Updated: Apr 30

Investigating a contractor in California before hiring is a critical step to ensure that you engage with a reliable and reputable professional for your construction needs. Here’s a comprehensive guide to help you through this process, featuring trusted resources like the Contractors State License Board (CSLB) and the Better Business Bureau (BBB).


1. Verify Contractor’s License with the Contractors State License Board (CSLB)

The CSLB is an essential resource for anyone looking to hire a contractor in California. It provides detailed information about the contractor’s license status, including any past violations, current standing, and the types of licenses held. Verifying a contractor’s license ensures that they are legally authorized to perform the work they are hired for in the state.


  • CSLB Website: Visit CSLB's official website for comprehensive information and tools to verify a contractor’s license status. The site offers guidance on how to check a contractor's license and provides resources for filing complaints.

2. Check Reviews and Complaints on the Better Business Bureau (BBB)

The BBB is a well-established organization that tracks business reliability and customer satisfaction. By checking a contractor on the BBB website, you can find reviews, ratings, and any complaints filed against them. This will give you insight into the contractor’s business practices and their track record with past clients.


  • BBB Website: For detailed reviews and to check the accreditation of businesses, including contractors, you can visit the Better Business Bureau’s website. The BBB offers a searchable database where you can find specific businesses or browse by service category.

3. Ask for References and Past Work Samples

In addition to these resources, directly asking the contractor for references and samples of past work can provide tangible proof of their capabilities and professionalism. Reaching out to past clients or reviewing past project portfolios can give you a better sense of the contractor’s quality of work and reliability.


4. Look for Additional Certifications or Memberships

Some contractors might hold certifications from industry organizations or memberships in professional associations. These can be indicators of their commitment to ongoing education, adherence to industry standards, and a professional approach to their work. While not all excellent contractors will have such affiliations, those who do may offer additional reassurance of their qualifications.


5. Consult Local Building Departments or Consumer Protection Agencies

Local government agencies or consumer protection offices often have records of complaints or legal actions taken against contractors. They might also offer additional resources for vetting professionals in your area.



Thoroughly investigating a contractor before hiring them for your project in California is essential for ensuring quality work and protecting your investment. By utilizing resources like the CSLB and the BBB, along with direct communication with potential contractors, you can make an informed decision and select a contractor who is both reputable and well-suited to meet your project’s needs.

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