California Class B General Building Contractor License: Scope, Verification, and What It Covers

The Class B general building classification authorizes a contractor to construct, alter, or repair any structure that requires at least two unrelated building trades or crafts, or to superintend the whole of such a project (Business & Professions Code §7057). It is the broad 'general contractor' license for whole-building work.

There are limits. A B can't take a job that involves only one trade (other than framing or carpentry) unless it holds the matching C-class or subcontracts that work to a properly licensed specialist. And a B can't self-perform certain specialties at all, notably C-16 fire protection and C-57 well drilling, which must be subcontracted to the right specialist.

Start with the license. On the CSLB "Check a License" tool or in this directory, confirm it reads Active and that the classification fits the project: a B for a whole-home build or remodel spanning multiple trades. Match the license to the exact business you're hiring; license numbers don't change when a business name does. Check that the $25,000 contractor bond is on file (Business & Professions Code §7071.6) and that workers' compensation coverage, or a valid exemption, is shown.

General liability insurance, which covers property damage and injuries, is generally optional for contractors and not tracked by CSLB. The exception is LLC licensees, which must carry liability insurance ($1,000,000 minimum) as a license condition, visible on the CSLB record as liability insurance history. For everyone else, ask the contractor for a current certificate of insurance and verify it with the insurer directly. 'Licensed and insured' means checking the CSLB record and the insurance certificate, not taking the phrase on a flyer at face value.

Any project where labor, materials, and all other items total $1,000 or more must be performed by a CSLB-licensed contractor. The threshold rose from $500 to $1,000 on January 1, 2025 under Assembly Bill 2622 (Business & Professions Code §7048). Below $1,000, a narrow minor-work exemption can apply only if the job is casual, minor, and standalone (not part of a larger project), requires no building permit of any kind, no one is employed on the job, and any advertising discloses that the person is not licensed.

On a whole-building project, the general contractor pulls the permits in their own name and is responsible for the licensed subcontractors. For anything beyond a minor repair, look for an Active B (or the matching C-class for a single-trade job).

A general building contractor must carry workers' compensation insurance for any employees. A contractor that genuinely works alone can currently file a no-employee exemption, so the CSLB record may show an exemption rather than a policy: confirm one or the other before you hire. Since January 1, 2026 (SB 291), a licensee caught employing workers without coverage faces minimum penalties of $10,000 per violation for a sole owner and $20,000 per violation for a partnership, corporation, or LLC, and cannot renew without current coverage.

Senate Bill 1455 will extend that requirement to every CSLB licensee, regardless of employees, on January 1, 2028, with CSLB's exemption-verification process due by January 1, 2027. Five high-risk classifications already carry no exemption at all, C-8 (concrete), C-20 (HVAC), C-22 (asbestos abatement), C-39 (roofing), and C-61/D-49 (tree service), and must hold coverage regardless of employees.

CSLB license numbers are six or seven digits; if the number on a business card has a different length or leads nowhere, treat that as a red flag rather than a typo to forgive. For name searches, small formatting differences matter: search individuals last name first, try both spaced and unspaced forms of a name ('Mc Donald' and 'McDonald'), use the first 10 to 15 letters of a long business name, and drop a leading 'The' or 'A'.

Remember whose name the license is in: CSLB licenses the business through its qualifying individual (an RMO or RME), so individual crew members won't appear in the database, and the record you find should match the exact business name on your contract. The record also shows only resolved disciplinary actions; CSLB does not publish pending complaints, so a clean record means no adjudicated discipline, not necessarily no complaints ever filed.