Every California contractor who takes on remodeling work must hold a license from the Contractors State License Board (CSLB). Checking it takes a few minutes and is the single best protection you have.
Step by Step
- Go to the CSLB website and open the “Check a License” page.
- Search by license number (it should be on the estimate, the contract and the company’s website) or by business name.
- Confirm the status is Active.
- Check the business name matches the one on your contract.
- Look at the classification, the bond, and the workers’ compensation status.
Classifications
- B — General Building: may take projects involving multiple unrelated trades, such as a remodel, an addition or an ADU.
- C classifications: specialty trades — for example C-10 electrical, C-36 plumbing, C-33 painting.
- A B contractor generally cannot contract a single specialty trade on its own unless it holds that specialty license, which is why some single-trade jobs need a specialist.
Warning Signs
- No license number on the estimate or contract
- A license that is expired, suspended or in another name
- Workers’ compensation shown as “exempt” when the company has employees on your job
- Pressure to sign quickly or pay a large deposit
Our License
IronNest Construction holds CSLB license #1130134, Class B (General Building). We carry general liability insurance and workers’ compensation, and we send certificates on request.
Beyond the License: Other Checks
- Read reviews on more than one platform, looking at how problems were handled
- Ask for a certificate of insurance sent from the insurer
- Ask who will supervise your job day to day
- Request a written, itemised proposal
- Confirm the business address and phone number
A contractor who is happy to answer these questions before you sign is likely to communicate well during the project.
Licensed Specialists on a General Contractor’s Job
On a remodel, a general contractor coordinates the trades — some work is done by the contractor’s own crew, and some by licensed specialists such as electricians and plumbers. The general contractor remains responsible for the whole project, its schedule and its quality, which is the main reason to hire one for multi-trade work.
If you are planning a project, IronNest Construction (CSLB #1130134) gives a written fixed price after a free site visit, handles the permit, and keeps one project manager on the job. Request a free estimate — we reply within 3–6 business hours.
Common Questions
Do handymen need a license?
California allows unlicensed workers only for very minor jobs below a low dollar threshold that includes labour and materials. Anything beyond that requires a licensed contractor, and work must not be split into small contracts to avoid the rule.
What does “Class B” mean?
A Class B General Building license allows a contractor to take projects that involve multiple unrelated trades on a structure, such as remodels, additions and ADUs.
Where do I report a problem with a contractor?
The Contractors State License Board accepts complaints about licensed and unlicensed contractors and can help resolve disputes.
