What is the 2025 Class B Study Guide?

• The California Business and Professions Code is written in dense legal language. We translate it into simple English.
• Commercial study guides cost $1,000+ but we believe that knowledge should be free, so you don't need to enroll in a program to use this guide b/c it's available to anyone, anywhere, anytime!
• Sources:
  • CSLB YouTube Channel
  • CSLB Class B Study Guide
  • California Building Code Definitions
  • California Contractors License Law & Reference Book
• Sections:
  1. Acronyms
  2. Random
  3. Occupancy Classification

Section: Random

When is a contractor's license required?

• When the total job cost (labor & materials) is $1,000 or more

What is the contractor's license experience requirement?

• Four years of experience w/in the last 10 years as any of the following:
• Journeyperson
  • Can perform the trade w/o supervision
• Foreperson
  • Oversee journeypeople
• Supervising employee
  • Construction lead
• Three years of Apprenticeship/Educational/Technical training (still need 1 year of practical experience)
  • College Transcripts
  • Technical School Transcripts
  • Apprenticeship Completion Certificates

What is egress?

• An exit from an occupied portion of a building or structure to a public space

What is a perimeter line?

• A boundary (line) drawn on an architect's site plan

What is a fire barrier?

• Wall, floor, or ceiling assembly designed to slow down or stop the spread of fire and smoke

What does x hour fire barrier mean?

• Fire-resistance rating
• For x hours the barrier must:
  • Maintain structural integrity
  • Limit temperature rise on the unexposed side
  • Act as a barrier to flames and hot gases